Answer:A Male,age 50
Explanation:
From forensic odontology description of a Male at age 50 to have a skull characteristic of no milk teeth, deep rooted maxillary due to change in structure of the canine teeth and no wisdom tooth.
The skull fits that data, if the data is A forensic deontologist examines the teeth of a skull and finds no baby teeth, no wisdom teeth, deep roots in the maxillary cuspids, and substantial tooth degeneration to a male of age 50, so option A is correct.
What is a skull?The skull's supporting bones. The skull is made up of facial bones and cranial bones, which surround and protect the brain (bones that form the eye sockets, nose, cheeks, jaw, and other parts of the face). The spinal cord and brain are joined by a gap at the base of the skull. Similar to the cranium.
According to forensic ontology, a male with a skull characteristic of age 50 had no milk teeth, a deep-rooted maxilla due to a change in the structure of the canines, and no wisdom teeth.
Therefore, the skull fits that data, if the data is A forensic deontologist examines the teeth of a skull and finds no baby teeth, no wisdom teeth, deep roots in the maxillary cuspids, and substantial tooth degeneration to a male of age 50.
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During a demonstration of the gravitational force on falling objects to her class, Sarah drops an 11 lb. bowling ball from the top of the science building. Determine distance the ball has traveled after falling for 1.0 second, ignoring air resistance and given the gravitational acceleration of 9.8 m/sec^2.
A) 4.9 m
B) 11 m
C) 20 m
D) 32 m
The instant it was dropped, the ball had zero speed.
After falling for 1 second, its speed was 9.8 m/s straight down (gravity).
Its AVERAGE speed for that 1 second was (1/2) (0 + 9.8) = 4.9 m/s.
Falling for 1 second at an average speed of 4.9 m/s, is covered 4.9 meters.
ANYTHING you drop does that, if air resistance doesn't hold it back.
The Answer is A)
nvfobovbb
Electrical energy is used to turn the blades of a fan. The amount of energy transformed is seen here : 750 J electrical energy is transformed into 400 J kinectic energy . What happened to the remaining 350j of energy?
In the conversion of electrical energy into kinetic energy in a fan, 350 J out of 750 J is lost as thermal energy due to resistance and inefficiencies.
Explanation:The 750 J of electrical energy is not entirely transformed into kinetic energy in this case. The fan only converts 400 J into kinetic energy, which is the energy that results in the fan's blades spinning. The remaining 350 J of energy is typically lost as thermal energy - this is seen in many electrical appliances where the device may start to heat up after continuous use.
This is because when electrical energy is converted into another form of energy, there is usually a certain amount of energy lost as thermal energy due to resistance and inefficiencies in the electric circuit.
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The remaining 350 J of energy is primarily converted into heat due to friction and air resistance, as well as sound energy produced by the fan.
When 750 J of electrical energy is transformed into 400 J of kinetic energy to turn the blades of a fan, the remaining 350 J of energy is not lost. According to the principle of energy conservation, energy can neither be created nor destroyed, only transformed from one form to another.
In this case, the remaining 350 J of energy is primarily converted into heat due to friction and air resistance, as well as possibly into sound energy produced by the fan.
This conversion happens because the fan's motor and mechanical components generate heat due to internal resistance and friction between moving parts. Additionally, some energy is used to produce the sound of the fan’s operation, contributing to the transformation of the original electrical energy.
A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. What is the maximum height attained by the ball? Round the answer to the nearest tenth of a meter
Answer:
8.6 m
Explanation:
The motion of a soccer ball is a motion of a projectile, with a uniform motion along the horizontal (x-) direction and an accelerated motion along the vertical (y-) direction, with constant acceleration [tex]a=g=-9.8 m/s^2[/tex] towards the ground (we take upward as positive direction, so acceleration is negative).
The initial velocity along the vertical direction is
[tex]v_{y0} = v_0 sin \theta = (26 m/s)(sin 30^{\circ})=13 m/s[/tex]
Now we can consider the motion along the vertical direction only. the vertical velocity at time t is given by:
[tex]v_y(t)=v_{y0} +at[/tex]
At the point of maximum height, [tex]v_y(t)=0[/tex], so we can find the time t at which the ball reaches the maximum height:
[tex]0=v_{y0}+at\\t=-\frac{v_{y0}}{a}=-\frac{13 m/s}{-9.8 m/s^2}=1.33 s[/tex]
And now we can use the equation of motion along the y-axis to find the vertical position of the ball at t=1.33 s, which corresponds to the maximum height of the ball:
[tex]y(t)=v_{y0}t + \frac{1}{2}at^2=(13 m/s)(1.33 s)+\frac{1}{2}(-9.8 m/s^2)(1.33 s)^2=8.6 m[/tex]
The scientist who discovered the laws of motion was _____.
A.Aristotle
B.Albert Einstein
C.Galileo Galilei
D.Isaac Newton
Sir Isaac Newton discovered and described the laws of motion in his book Principia Mathematica published on July 5th, 1687.
D. Isaac Newton
Answer:
D, Isaac Newton.
Explanation:
Newton's laws of motion, relations between the forces acting on a body and the motion of the body, first formulated by English physicist and mathematician Sir Isaac Newton.
There are multiple tuning forks present in the room, and Annie strikes one with a natural frequency of 400 Hz. Which of these other tuning forks will begin to vibrate through resonance and make the sound louder?
a 200 Hz tuning fork
a 400 Hz tuning fork
a 800 Hz tuning fork
a 1600 Hz tuning fork
B. a 400Hz tuning fork
Answer: The correct answer is 400 Hz tuning fork.
Explanation:
Resonance occurs when the natural frequency of the object matches with frequency of the others.
In the given problem, there are multiple tuning forks present in the room, and Annie strikes one with a natural frequency of 400 Hz.
Therefore, the tuning fork having frequency of 400 Hz will begin to vibrate through resonance and the sound louder.
The center on a high school basketball team wants to increase the maximum height of his jump. What statement correctly describes how he could achieve this goal?
A) Wearing lighter shoes would increase the height of his jump.
B) Jumping at a 45° angle would increase the height of his jump.
C) Jumping with greater acceleration would increase the height of his jump.
D) Jumping with greater initial velocity would increase the height of his jump.
Answer:
D) Jumping with greater initial velocity would increase the height of his jump.
Explanation:
As the center of the team jumps, his motion is an accelerated motion with initial velocity [tex]v_0[/tex] upward and constant acceleration [tex]g=9.8 m/s^2[/tex] (acceleration due to gravity) towards the ground.
According to the law of conservation of energy, the gravitational potential energy of the center as it reaches its maximum height (h) is equal to the initial kinetic energy just after he starts the jump:
[tex]U=K\\mgh=\frac{1}{2}mv_0^2[/tex]
where
m is the mass of the center
g is the acceleration due to gravity
h is the maximum height
v0 is the initial velocity
Re-arranging the formula, we find:
[tex]h=\frac{v_0^2}{2g}[/tex]
Therefore, we see that the greater the initial velocity v0, the higher the center will jump.
If a particle spends 8 seconds in the air and travels 320 m forward and to a height of 64 m what is the horizontal velocity
he speed up the incline is 300m/5s = 60m/s
the horizontal component of that is 60 cos 15 = 57.95m/s
the research of a social physiologist Vincent Hsu determined that americans tend to fulfill their ideal of self-reliance through
A. developing personal ideals
B.rebellion against social norms
C. confirming to role models
D. strong individualism
Vincent Hsu’s research shows that Americans tend to full their ideal of self-reliance by (B) rebellion against the social norms. These are quite commonly found throughout each American generations, where counter-culture is a way for them to establish self-reliance.
Though individualism is a value that is an embodiment of American culture back then and now, it is not how Americans establish self-reliance. Nor do they develop personal ideals or confirm to a role model.
An object's natural frequency depends partially on the material from which it is made.
Yes. Partly. Also on the size and shape of the object, and also on what material it's IN at the time ... like air, water, Helium, Jello, etc.
An object's natural frequency depends partially on the material from which it is made.
true - material determines its strength, hardness, elasticity n other physical properties dat affect its natural frequency. other factors include the shape n size of the object.
please help on this one?
Number c is right answer because it doesn't talk about forces rather it talks about planetary motions and orbits
Kepler and Newton studied the movement of planets. Kepler studied the speed of the planets while Newton studied the forces that kept the planets in place. Which of these statements best explains why the two scientists proposed different theories about the planets?
They had different goals.
They studied different models.
They used different sets of data.
They misinterpreted their findings.
Answer:
They studied different models.
Explanation:
Newton's laws pertained to the study of objects based on the concepts of gravity. Forces between the planetary bodies were give by the universal law of gravitation of Newton.
Kepler's 3 laws defined the orbits of the planets, and also a way to relate their orbital radius to their time periods and the velocity law. According to the law of speed, if a planet is close to the Sun it will move faster and if it is farther away from the sun, it slows down and will have lesser speed.
According to Newton's gravitational law , a planet that is closer to the sun experiences a greater force or gravitational pull and vice versa.
The collision of the deep impact probe with the nucleus of comet tempel 1 in 2005 revealed the nucleus as a rubble pile held together by
Answer
correct Answer is gravitation
Explanation
In 2005, collision of deep impact probe with the nucleus of comet tempel 1 was carried out. In this probe the length of Tempel 1's nucleus was about 5km long. In this probe it was revealed that the nucleus behave as a rubble pile which is held together by gravitation.
In this probe speed of Tempel 1 which is moving towards the nucleus was 10km/s. In this probe series of images was recorded and cloud of debris was analyzed,It was discovered that comet is made up of a primordial chunk of solar system material. It was observed that Tempel 1's has tiny grains of silicates, iron compounds, complex hydrocarbons, and clay and carbonates thought to require liquid water to form it was more appropriate for a cosmic souffle, as the nucleus is apparently porous and fluffy.
Answer:
Self Gravity
Explanation:
Tempel 1 is a periodic Jupiter-family comet discovered in 1867 by Wilhelm Tempel which is where it got its name from.It takes 5.5 years for it to complete an orbit of the Sun.
After the probe of the collision which took place in 2005, it was discovered that the comet was held together only by self-gravity rather than by structural bonds between the cometary particles themselves.
What is the velocity in meters per second of a runner who runs exactly 110 m towards the beach in 72 seconds
v=d/t=110/72=1.5277 m/s
Which of these statements correctly describe the atom? Check all that apply. All matter on Earth is made up of atoms. The subatomic particles of an element retain the properties of that element. The neutron has no charge and identifies the element. The electron is negatively charged and is located in a cloud surrounding the nucleus. The proton is positively charged and is found in the nucleus.
Answer:
All matter on Earth is made up of atoms.
The electron is negatively charged and is located in a cloud surrounding the nucleus.
The proton is positively charged and is found in the nucleus.
Explanation:
As we know that the atom is made up of three sub atomic particles give as
1). Electrons
2). Protons
3). Neutrons
Now we know that neutrons do not have any charge but it stays inside the nucleus and more than 50% of mass of the nucleus is due to neutrons.
Protons are of positive charge and it also stays inside the nucleus and number of protons inside the nucleus is same as atomic number.
Electrons are always of negative charge and it stays outside the nucleus in form of electron cloud and total negative charge of electron must be equal to total positive charge of proton in neutral atom.
Atoms are the basic building blocks of all matter on Earth. The subatomic particles retain the properties of the element, and the electron is negatively charged and located in a cloud surrounding the nucleus.
Explanation:The statements that correctly describe the atom are:
All matter on Earth is made up of atoms. Atoms are the basic building blocks of all matter. Everything around us, including ourselves, is made up of atoms.The subatomic particles of an element retain the properties of that element. The three subatomic particles of an atom are protons, neutrons, and electrons. Protons identify the element and determine its atomic number, while neutrons and electrons contribute to the atom's mass and charge. Each element has a unique combination of these subatomic particles that give it its specific properties.The electron is negatively charged and is located in a cloud surrounding the nucleus. The proton is positively charged and is found in the nucleus. Electrons are negatively charged particles that orbit the nucleus in specific energy levels or shells. Protons, on the other hand, are positively charged particles located within the nucleus of the atom.Learn more about Atom here:https://brainly.com/question/30735712
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A train traveling at a constant speed covers a distance of 960 meters in 30 seconds. What is the train's speed?
32 meters per second
Answer:
32 m/sec
Explanation:
Given,
⇒ Distance that is covered= 960 meters
⇒ Time taken= 30 seconds
We know that,
⇒ [tex]Speed=\frac{distance}{time taken}[/tex]
⇒ [tex]Speed =\frac{960}{30}[/tex]
Therefore, speed = 32 m/sec.
The resultant of 3 forces in equilibrium is equal to the vector sum of any 2 of the forces.
True or False?
Answer:
False
Explanation:
When 3 (non zero) forces are in equilibrium, the resultant (net) force is 0. The sum of any two components will therefore be non-zero and consequently not equal to the original resultant.
Which metal is the most abundant in the Earth’s crust
aluminum (Al)
iron (Fe)
copper (Cu)
zinc (Zn)
The metal that is the most abundant in the earths crust is Aluminum
I believe it is iron (Fe).
Iron + oxygen are usually found together.
a rocket blasts off and moves away (distance is increasing) form earth. how is the rocket affected by the earths gravitational pulls as it moves further away?
the right answer is C
During the first 5 seconds of a rocket launch, the momentum of the rocket increased by 10,000 kg m/s. What was the impulse applied to the rocket during this time?
Answer:
10,000 kg m/s
Explanation:
The impulse exerted on an object is equal to the change in momentum of the object itself:
[tex]I=F \Delta t = \Delta p[/tex]
where
I is the impulse
F is the force applied
[tex]\Delta t[/tex] is the time during which the force has been applied
[tex]\Delta p[/tex] is the change in momentum
In this problem, we are already given the change in momentum of the rocket: since the rocket starts from rest, its change in momentum is equal to its momentum after 5 seconds,
[tex]\Delta p = 10,000 kg m/s[/tex]
and so, the impulse is equal to this value.
Final answer:
The impulse applied to the rocket during the first 5 seconds of its launch, which resulted in a momentum increase of 10,000 kg m/s, is equal to 10,000 kg m/s, as impulse is directly equivalent to the change in momentum.
Explanation:
The question involves the concept of impulse in physics, which relates to the change in momentum of an object when a force is applied over a period of time. In the scenario provided, the rocket's momentum increased by 10,000 kg m/s over the first 5 seconds of the launch. By definition, the impulse applied to the rocket is equal to the change in momentum, which in this case is also 10,000 kg m/s. Since impulse (J) is equal to the product of the force (F) and the time interval (δ) during which the force is applied, we can express the formula as J = Fδt. Because the momentum change is given for a specified time interval (the first 5 seconds), the impulse can be directly calculated without needing to determine the specific force values at each moment during that period.
The position equation for a particle is s of t equals the square root of the quantity 2 times t plus 1 where s is measured in feet and t is measured in seconds. find the acceleration of the particle at 4 seconds. 3 ft/sec2 one third ft/sec2 negative 1 over 27 ft/sec2 none of these
The acceleration of the particle at 4 seconds is -1/15 ft/sec².
Explanation:The position equation for the particle is s(t) = √(2t+1). In order to find the acceleration at t = 4 seconds, we need to differentiate the position equation twice with respect to time, t. First, differentiate the position equation to find the velocity equation, v(t). Then, differentiate the velocity equation to get the acceleration equation, a(t). Finally, substitute t = 4 into the acceleration equation to find the acceleration of the particle at 4 seconds.
Step 1: Differentiate s(t) with respect to t to find v(t)
v(t) = d/dt(√(2t+1)) = 1/(2√(2t+1)) * d/dt(2t+1) = 1/(2√(2t+1)) * 2 = 1/√(2t+1)
Step 2: Differentiate v(t) with respect to t to find a(t)
a(t) = d/dt(1/√(2t+1)) = (-1/2)(2t+1)^(-3/2) * d/dt(2t+1) = (-1/2)(2t+1)^(-3/2) * 2 = -1/(t+1)√(2t+1)
Step 3: Substitute t = 4 into a(t)
a(4) = -1/(4+1)√(2(4)+1) = -1/5√9 = -1/5 * 1/3 = -1/15 ft/sec²
Therefore, the acceleration of the particle at 4 seconds is -1/15 ft/sec².
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To find the acceleration of a particle, we first and second derivative of the position equation. Substituting time t=4s into this equation yields the acceleration: -1/108 ft/sec², which is not among the given options.
Explanation:To find the acceleration of a particle whose position equation is given, it's necessary to compute the first and second derivatives of s with respect to t. In this case, the equation is s(t) = sqrt(2t+1). Its derivative, v(t), represents the velocity of the particle, and the derivative of v(t) gives a(t), the acceleration.
First find the derivative of s(t):
v(t) = ds/dt = 1 / 2*sqrt(2t+1)
Then, find the second derivative, which will yield the acceleration:
a(t) = dv/dt = -1 / 4*(2t+1)^(3/2)
By substituting t=4s into the acceleration equation a(t), we get a(4) = -1/108 ft/sec², which reduces to approximately -0.00926 ft/sec². Therefore, the correct answer is none of the given options.
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20 points, just need a basic understanding. You are on a mystery planet, what you know is that from a height of 10.0 meters, a dropped ball takes 0.88 seconds to hit the ground.
a. List givens
b. Calculate g
c. Determine the final velocity of the ball before striking the ground.
(since you asked for basic understanding only, I am not including actual calculations. Please let me know in the comments section if you wish to verify your solution(s))
For (b): Use the formula for distance (s) made during an accelerated motion:
[tex]s = \frac{1}{2}at^2+ v_0t+s_0= \frac{1}{2}at^2= \frac{1}{2}gt^2[/tex]
with v_0 and s_0 being the initial velocity and distance, both 0 in this case, and with "a" denoting the acceleration, in this case solely due to gravitational acceleration so: "g."
You are given the distance made, namely 10 m, and the duration t (0.88s) and so using the formula above you can solve for g.
For (c), to determine the final velocity at time 0.88s use the formula for the instantaneous velocity of an accelerated motion
(velocity at time t) = (acceleration) x (time)
again, with acceleration due to gravity, i.e., a = g and with g as determined under (b).
If my calculation is correct, this mystery planet could be the Jupiter.
Beth exerts 14 N of force to propel a 4.5 kg bowling ball down the lane. Describe how the ball will travel
It will have a certain kinetic energy at the beginning, but it will be lost by resistant work done by friction. Thus, itsmotion wil be uniformly decelerating.
The ball will accelerate at a rate of 3.11 m/s² and the ball will travel an accelerated motion.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. A spring balance can be used to calculate the Force. The Newton is the SI unit of force.
Given parameters:
Mass of the ball: m = 4.5 kg.
Force exerted on it: F = 14 N.
From Newton's second law of motion: it can be written that:
Applied force = mass of the object × acceleration of the object
acceleration = force/mass
= 14 N/4.5 kg
= 3.11 m/s².
Hence, the ball will accelerate at a rate of 3.11 m/s² and the ball will travel an accelerated motion.
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pitbulllover101
Rutherford's famous gold foil experiments shot heavy particles at a thin sheet of gold foil. What did he observe, and why did these observations eventually result in the addition of a nucleus to the atomic model?
Some of the heavy particles bounced off the foil, because there are positive particles spread throughout the atom.
Some of the heavy particles bounced off the foil, because there is a dense, positive area in the atom.
The heavy particles all passed straight through the foil, because the atoms are mostly empty space.
The heavy particles all bounced off the foil, because the subatomic particles have mass and volume.
Answer:
Some of the heavy particles bounced off the foil, because there is a dense, positive area in the atom.
Explanation:
As per the observation of experiment he observed that very few heavy particles in this experiment bounced off in opposite direction.
Due to this reverse direction motion we can conclude that there must be a small dense region in which there is same charge concentrated which will repel the heavy particle
This region is concluded in very small space because major proportion move out the foil without any deviation only few of the particles will return back.
So here we can say that correct option must be
Some of the heavy particles bounced off the foil, because there is a dense, positive area in the atom.
A wave travels at a speed of 34 cm/s. It’s wavelength is 18 cm. What is the period of the wave?
0.75 s
1.2 s
0.66 s
0.53 s
Regions of compression and rarefaction help define _______.
Electromagnetic waves
Longitudinal waves, but not transverse waves
Transverse waves, but not longitudinal waves
All mechanical waves
The period of a wave with a speed of 34 cm/s and a wavelength of 18 cm is 0.53 seconds. Regions of compression and rarefaction define longitudinal waves, not transverse waves.
Calculate the period of a wave, we can use the relationship between speed (v), wavelength (λ) , and period (T). This relationship is expressed as
v = λ / T
which can be rearranged to find T
Given that the speed of the wave is 34 cm/s and its wavelength is 18 cm, we substitute these values into the equation to find the period:
T = 18 cm / 34 cm/s.
Calculating this gives us T = 0.5294117647 seconds, which rounds to 0.53 seconds.
As for the second part of your question, the regions of compression and rarefaction help define longitudinal waves, but not transverse waves. Transverse waves have crests and troughs, while longitudinal waves consist of compressions and rarefactions.
In this lab you will use a cart and a track to explore Newton's second law of motion. You will vary two different variables and determine how each one affects how quickly the cart moves along the track. In the space below, write a scientific question that you can answer by doing this experiment.
Answer:
Newtons II law:
It is defined as "the net force acting on the object is a product of mass and acceleration of the body" . Also it defines that the "acceleration of an object is dependent on net force and mass of the body".
Let us assume that,a string is attached to the cart, which passes over a pulley along the track. At another end of the string a weight is attached which hangs over the pulley. The hanging weight provides tension in the spring, and it helps in accelerating the cart. We assume that the string is massless and no friction between pulley and the string.
Whenever the hanging weight moves downwards, the cart will accelerate to right side.
For the hanging weight/mass
When hanging weight of mass is m₁ and accelerate due to gravitational force g.
Therefore we can write F = m₁ .g
and the tension acts in upward direction T (negetive)
Now, Fnet = m₁ .g - T
= m₁.a
So From Newtons II law F = m.a
Answer:
Sample Response: How do force and mass affect the acceleration of an object?
Explanation:
The density of an object has the equation d = m/v. If an object has a mass of 2.5 g and a volume of 1.3 cm^3, what is its density?
A. 0.59 g/cm^3
B. 3.8 g/cm^3
C. 1.93 g/cm^3
D. 1.2 g/cm^3
Equation
d = m/v
Givens
m = 2.5 gramsV = 1.3 cm^3d = ??Solution
d = m/vd = 2.5 / 1.3d = 1.92 g/cm^3Answer C
Give the electron geometry, molecular geometry, and hybridization for cbr−3. give the electron geometry, molecular geometry, and hybridization for . eg = trigonal pyramidal; mg = trigonal pyramidal; sp3 eg = octahedral; mg = octahedral, sp3 eg = trigonal planar; mg = trigonal planar; sp2 eg = tetrahedral; mg = linear; sp3 eg = tetrahedral; mg = trigonal pyramidal; sp3
Answer: Electronic geometry is tetrahedral, molecular geometry is trigonal pyramidal and hybridization is [tex]sp_3[/tex]
Explanation: Formula used for calculating the no of electrons:
[tex]:{\text{Number of electrons}} =\frac{1}{2}[V+N-C+A][/tex]
where, V = number of valence electrons present in central atom i.e. carbon = 4
N = number of monovalent atoms bonded to central atom=3
C = charge of cation = 0
A = charge of anion = -1
[tex]CBr_3^{-}:[/tex]
[tex]{\text{Number of electrons}} =\frac{1}{2}[4+3-0+1]=4[/tex]
The number of electrons is 4 that means the hybridization will be [tex]sp^3[/tex] and the electronic geometry of the molecule will be tetrahedral.
But as there are three atoms around the central carbon, the fourth position will be occupied by lone pair of electrons. The repulsion between lone and bond pair of electrons is more and hence the molecular geometry will be trigonal pyramidal.
The CBr₃ compound has a tetrahedral electron geometry and molecular geometry because it has four regions of electron density. As a result, the carbon atom undergoes sp3 hybridization. The structure and chemical bonding of a molecule, which are indicated by its electron pair geometry, molecular geometry, and hybridization, are key in predicting its properties and reactivity.
Explanation:The compound CBr₃ has an electron geometry and molecular geometry that are both tetrahedral due to the presence of four regions of electron density (three for the bonded Bromine atoms and one for the lone pair). This also results in the carbon atom undergoing sp3 hybridization. As a result, the electron pair geometries and molecular structures for CBr₃ are tetrahedral.
An easy way to figure this out is by using the valence shell electron pair repulsion (VSEPR) theory, where the molecular structure is largely determined by the repulsion between the electron pairs in the valence shell of the atoms in the molecule. Overall, the electron pair geometry, molecular geometry, and hybridization of a molecule provide key information about its structure and chemical bonding which are crucial to predicting its properties and reactivity.
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Which is a way that acoustic engineers attempt to limit the destructive interference of reflected sound waves in an auditorium?
designing a space with a lower ceiling
designing a space with sound-absorbing tiles
designing a smaller space
designing a larger space
Correct answer is B. Designing a space with sound-absorbing tiles.
In order to limit the destructive interference of reflected sound waves in an auditorium, the acoustic engineers needs to provide sound-absorbing tiles in that area. Due to reflection of sound waves, destructive interference is created in the hall of auditorium. Sound-absorbing tiles have ability to absorb those waves and provide good sound ecosystem to the auditorium room.
A golf club hits a stationary 0.05kg golf ball with and average force of 5.0 x 10^3 newtons accelerating the ball at 44 meters per second. What is the magnitude of impulse imparted to the ball by the golf club?
Answer: The magnitude of impulse imparted to the ball by the golf club is 2.2 N seconds
Explanation:
Force applied on the golf ball = [tex]5.0\times 10^3 N[/tex]
Mass of the ball = 0.05 kg
Velocity with which ball is accelerating = 44 m/s
Time period over which forece applied = t
[tex]f=ma=\frac{m\times v}{t}[/tex]
[tex]t=\frac{0.05 kg\times 44m/s}{5.0\times 10^3 N}=4.4\times 10^{-4} seconds[/tex]
[tex]Impulse=(force)\times (time)=f\times t = 5.0\times 10^3\times 4.4\times 10^{-4} seconds=2.2[/tex] Newton seconds
The magnitude of impulse imparted to the ball by the golf club is 2.2 N seconds
The magnitude of impulse imparted to the ball by the golf club is 2.2 N-s.
Given data:
The mass of golf is, m = 0.05 kg.
The magnitude of average force on ball is, [tex]F = 5.0 \times 10^{-3} \;\rm N[/tex].
The velocity of the ball is, v = 44 m/s.
Apply the impulse-momentum theorem, which says that the average force acting on the body is equal to the change in momentum with respect to time. therefore,
[tex]F = \dfrac{dp}{dt} \\\\F = \dfrac{m \times v}{t} \\F \times t = m \times v[/tex]
Here, t is the impact time and the expression [tex](F \times t)[/tex] is known as impulse (I).
Solving as,
[tex]F \times t = m \times v\\I = 0.05 \times 44\\I = 2.2 \;\rm N-s[/tex]
Thus, the magnitude of impulse imparted to the ball by the golf club is 2.2 N-s.
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You are in a planet where the acceleration due to gravity is known to be 3.28 m/s^2. You drop a ball and record that the ball takes 2.40 s to reach the ground. How fast is the ball moving just as it lands? Neglect air resistance.
A.) 1.12 m/s
B.) 7.87 m/s
C.) 3.55 m/s
D.) 2.81 m/s