In the absence of air resistance, projectiles exhibit accelerated vertical motion due to gravity and constant horizontal motion, as there is no horizontal force acting upon it.
Explanation:Assuming no air resistance, all projectiles exhibit C) accelerated vertical motion and constant horizontal motion.
In physics, the motion of a projectile under gravity is divided into two components: vertical and horizontal. The vertical motion of a projectile is influenced by the force of gravity, which causes a constant acceleration downwards. This is why when a projectile is launched, it moves upwards slowing down until it reaches a peak, and then accelerates downwards as it falls. The force of gravity does not affect the horizontal motion, which remains constant assuming no air resistance.
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Final answer:
The answer is C) accelerated vertical motion and constant horizontal motion, due to gravity's constant acceleration acting vertically and no horizontal forces acting after launch.
Explanation:
The correct answer to the student's question is C) accelerated vertical motion and constant horizontal motion. In projectile motion, assuming no air resistance, the horizontal component of the motion has a constant velocity because there is no force acting in the horizontal direction once the object is in flight. However, the vertical component is influenced by the constant acceleration due to gravity (9.80 m/s2 downward). Thus, the vertical motion of a projectile is always accelerating downward at a constant rate, while the horizontal motion proceeds at a constant velocity.
One way to think about this is to imagine throwing a ball forward; the ball will move horizontally at the speed you threw it (ignoring air resistance) but will also begin to fall vertically due to gravity. This results in a characteristic parabolic motion, which is a path that the projectile follows under the influence of only constant gravitational acceleration.
Directions: WRITE a summary of the Newton’s Laws of Motion reading.
Your summary must correctly use the following academic language:
-Motion.
- inertia .
-acceleration interaction.
Answer:
In Newton's 1st Law, a stationary body or that moving with a uniform motion, will only change its state if acted upon by other external forces.This restance to change in position/motion is called inertia. In his second law, when a body is acted upon by a force, the force will be equal to the product of mass and acceleration of the body.i.e. Force= m.a. In the third law, it explains that a body will exert an equal and opposite force when intracting with another body.Here, every action force experiences an equal and opposite reaction force, where the momentum of the bodies will be conserved.
Which are examples of a medium? water and air amplitude and wavelength crests and troughs compressions and rarefactions
Answer:
water and air
Explanation:
A wave is a transmission of a disturbance from one point or the source to another point.Transmission of a wave occurs through a material medium or a vacuum. Therefore a medium is the material through which a wave travels through. The medium may be in gaseous form, slid form or liquid form. Therefore water and air are example of medium of transmission of a wave.Air and water offer passage to waves so each can serve as a medium. A medium is the material through which waves pass.
What is a medium?The term medium refers to a pathway through which waves can pass. It refers to any thing that can offer a passage to waves.
Having known what a medium is, we now ask ourselves, what are the tings among the options that can serve as a medium? Clearly air and water offer passage to waves so each can serve as a medium.
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Please help!!!! discussion Topic
An enormous amount of electricity is created at
power-generating stations and sent across the
country through wires that carry high voltages.
Appliances, power lines, airport and military
radars, substations, transformers, computers, and
other equipment that carries or uses electricity all
generate electromagnetic fields.
Many questions have been raised about how
electromagnetic fields affect our bodies. Do they
pose a public health risk? Perform an Internet
search to find information about the effects of
electromagnetic fields on public health. Then,
discuss the pros and cons of using equipment that
produces an electromagnetic field.
Answer:
Scientists studies have found that the terrestrial electromagnetic environment is actually affecting our health. It is hard to avoid these fields because there are so many things in our life that generate electro magnetic fields. Some of the bioeffects inculde changes in melatonin levels, effects on spatial memory, alteration of intracellular calcium concentration, changes in blood-brain-barrier permeability, enzyme activity, genotoxicity, nonspecific disabilities, and subjective symptoms. Scientists have also found that radiation exposure from mobile phones has been linked with tinnitus, brain tumours, and acoustic neuroma.
The electromagnetic fields have many pros and cons and the human being. Yes, they pose a public health risk.
What is magnetic field?The magnetic field is the region of space where a charged object experiences magnetic force when it is moving.
When current flows through the circuit, the coil gets magnetized. In an electrical circuit , the magnetic field of a straight wire has less magnetic field strength than that of coiled wire.
An enormous amount of electricity is created at power-generating stations and sent across the country through wires that carry high voltages. Appliances, power lines, airport and military radars, substations, transformers, computers, and other equipment that carries or uses electricity all generate electromagnetic fields.
Scientist have discovered that the earthly electromagnetic climate is really influencing our wellbeing. It is difficult to keep away from these fields since there are such countless things in our day to day existence that create electromagnetic fields.
A portion of the bioeffects include changes in melatonin levels, consequences for spatial memory, modification of intracellular calcium fixation, changes in blood-mind hindrance penetrability, chemical movement, genotoxicity, vague handicaps, and emotional side effects. Researchers have additionally found that radiation openness from cell phones has been connected with tinnitus, cerebrum cancers, and acoustic neuroma.
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Into how many main groups are fish divided?
a. one
b. two
c. three
d. four
Answer:
Fish are divided into three main groups, which include Cartilaginous fish, Bony fish, and Lobe-finned fish.
A light ray in air is incident on an air to glass boundary at an angle of 40 degrees and is refracted in the glass of 25 degrees with the normal. What is the index of refraction of the glass? A. 1.10 B. 1.25 C. 1.33 D. 1.52 HELP PLEASE!!!!!!!!!
Answer:
D
Explanation:
Snell's law states:
n₁ sin θ₁ = n₂ sin θ₂
where n is the index of refraction and θ is the angle of incidence (relative to the normal).
The index of refraction of air is approximately 1. So:
1 sin 40° = n sin 25°
n ≈ 1.52
Theindex of refraction of glass is calculated to be 1.52, which is option D.
To find the index of refraction of glass when a light ray in air is incident on an air to glass boundary at an angle of 40 degrees and is refracted in glass at 25 degrees with the normal, we use Snell's law. Snell's law is expressed as n1 sin(θ1) = n2 sin(θ2), where n1 and n2 are the indices of refraction of the first and second mediums, respectively, and θ1 and θ2 are the angles of incidence and refraction, respectively. Given that the index of refraction of air (n1) is approximately 1, we can solve for the index of refraction of glass (n2) as follows: 1 ×sin(40 degrees) = n2 × sin(25 degrees). Solving this equation gives us n2 = 1.52, which indicates the index of refraction of the glass is 1.52, corresponding to option D.
Work and Energy
A 68 kg students runs up a flight of stairs 3.5 meters high in 11.4 seconds. The student takes 8.5 seconds to run up the same flight of stairs during a second trial. Determine the following:
a. The work done in each trial. You should identify these values as W1 and W2.
b. The power exerted by the student in each trial. You should identify these values as P1 and P2.
a) [tex]W_1 = 2332 J[/tex], [tex]W_2= 2332 J[/tex]
The work done by the student in each trial is equal to the gravitational potential energy gained by the student:
[tex]W=mg\Delta h[/tex]
where
m = 68 kg is the mass of the student
g = 9.8 m/s^2 is the acceleration of gravity
[tex]\Delta h[/tex] is the gain in height of the student
For the first student, [tex]\Delta h = 3.5 m[/tex], so the work done is
[tex]W_1 = (68)(9.8)(3.5)=2332 J[/tex]
The second student runs up to the same height (3.5 m), so the work done by the second student is the same:
[tex]W_2 = (68)(9.8)(3.5)=2332 J[/tex]
2) [tex]P_1 = 204.6 W[/tex], [tex]P_2 = 274.4 W[/tex]
The power exerted by each student is given by
[tex]P=\frac{W}{t}[/tex]
where
W is the work done
t is the time taken
For the first student, [tex]W_1 = 2332 J[/tex] and [tex]t=11.4 s[/tex], so the power exerted is
[tex]P_1 = \frac{W_1}{t_1}=\frac{2332 J}{11.4 s}=204.6 W[/tex]
For the second student, [tex]W_2 = 2332 J[/tex] and [tex]t=8.5 s[/tex], so the power exerted is
[tex]P_2 = \frac{W_2}{t_2}=\frac{2332 J}{8.5 s}=274.4 W[/tex]
Which of the following types of units is based on the metric system in the United States?
the mile
the ounce
the dollar
the pound
Answer:
The mile
Explanation:
this is calculated using the metric system in kilometers..
Final answer:
None of the listed units (the mile, the ounce, the dollar, the pound) are based on the metric system used in the United States; these are all part of the customary or English system, except for the dollar, which is a currency.
Explanation:
None of the units mentioned - the mile, the ounce, the dollar, or the pound - are based on the metric system. These are all part of the English (Imperial) system of measurement that is primarily used in the United States. The metric system units for length, mass, and volume would be the meter (m), kilogram (kg), and liter (L), respectively. Meanwhile, the mile, ounce, and pound pertain to customary units of length and mass used in the U.S. which are based on the system developed in England. In contrast, the dollar is a unit of currency and not a unit of measurement for physical quantities.
When dealing with units used in science, the metric system is generally preferred because it facilitates easier conversion and calculation due to its base 10 structure. For example, a meter is approximately 1.1 yards, a kilogram is equivalent to about 2.2 pounds, and the second is the same in both the metric and American systems. In science, SI (International System of Units) units are used, which are metric units.
How much force was applied to an object if was moved 2 meters and the work done on the object was 8 joules?
A.) 0.25 N
B.) 4 N
C.) 6 N
D.) 16 N
Answer:
The answer is 4N or B
Explanation:
Just the equation W = F x D.
We have W = 8 J and D = 2 m using algebra ....
8J/2m = F ... F = 4.
Answer:
B 4N
Explanation:
How many chlorine atoms are needed on the left in order to balance this chemical equation?
__ Ag __ Cl → __ AgCl2
Answer:
2
Explanation:
There are 2 chlorine atoms in AgCl₂. So to balance the equation, there needs to be 2 atoms on the left side as well.
Final answer:
The question likely contains a typo, as AgCl2 is not a standard chemical compound. Assuming a standard compound AgCl, the balanced equation would require two silver atoms and one chlorine molecule to produce two units of AgCl.
Explanation:
The chemical equation provided in the question seems to have a typo since AgCl2 is not a common chemical compound, as silver typically forms AgCl. Assuming the intention was to balance a reaction forming AgCl, the balanced equation would look like this:
[tex]2 Ag (s) + Cl_2 (g) - > 2 AgCl (s)[/tex]Here, you need two silver (Ag) atoms and one chlorine (Cl2) molecule to produce two units of AgCl. Each chlorine molecule provides two chlorine atoms, which combine with the two silver atoms to form two AgCl units.
If the typo is ignored and we consider AgCl2, balancing a non-standard chemical equation may not be possible since the compound is not representative of known stable silver chlorides.
What state of matter has the most energy
Answer:
gas particles have the greatest amount of energy
The main characteristic of all vertebrates is the presence of
a. cartilage
b. a large brain
c. a backbone
d. an exoskeleton
I got it. The answer was B
Answer:
c
Explanation:
backbone is the correct answer
Which of the following is not a simple machine?
A. A Wheel and axle
B. A lever
C. A pair of scissors
D. A screw
Answer:
C
Explanation:
A wheel and axle, a lever, and a screw are all simple machines.
A pair of scissors is not a simple machine.
Answer is C.
C. scissors are a TYPE of. it is not a simple machine
The image shows positions of the earth and the moon in which region would an astronaut feel the lightest
Answer:
The moon region
Explanation:
This is because there is little to no gravity on the moon. That is where the astronaut would feel the lightest.
Answer:
The moon region should be right i got it right on the test
Explanation:
Compare and contrast power and work.
Answer:
Comparison
Displacement and force are factors of both work and power
Work=Force× Displacement
power=(Force×Displacement)/time
Therefore power is the derivative of work with respect to time.
Contrast
Work is defined as a product of force and distance while power is the rate at which the work is done.
Match the vocabulary terms to their definitions.
See the attached picture:
Answer:
the order of blanks from top to bottom is
6
3
2
4
5
1
Explanation:
PLEASE HELP APEX
in an isolated system, two cars, each with a mass of 1,100 kg, collide. car 1 is initially at rest, while car 2 was moving at 10m/s. what is the magnitude of their combined momentum after the collision?
Answer:
A
Explanation:
Momentum before = momentum after
(1,000 kg) (0 m/s) + (1,000 kg) (10 m/s) = p
10,000 kg m/s = p
Answer is A.
Answer: The answer is A.
Okey, here we need to use the conservation of momentum!
(in the text and the image the masses are different, i will use the one of the image)
the total momentum before the collision is:
P = momentum of car 1 + momentum of car 2 = 0m/s*1000 kg + 10 m/s*1000 kg.
so the initial momentum is 10000 kg*m/s.
Because the system is isolated, and we will think that there is no loss of energy because of friction or anything like that, the momentum will conservative after the collision ( in a real situation the cars will absorb some of the energy in the collision).
So using the conservation of momentum, the momentum after the collision must be the same as before, so the answer is A = 10000 kg*m/s.
How is the Sun similar to the stars that can be seen at night?
A) The Sun makes light energy.
B) The Sun takes light energy from space.
C) The Sun warms the Earth with its light.
D) The Sun reflects light from the planets.
Answer:
A
Explanation:
Answer:
A
Explanation:
cuz it is
The average radius of Mars is 3,397 km. If Mars completes one rotation in 24.6 hours, what is the tangential speed of objects on the planet’s surface? Round your answer to the nearest whole number.
Answer:
Tangential speed of objects on the planet’s surface = 241 m/s
Explanation:
Speed is given by the ratio of distance traveled to the time.
Radius of mars, r = 3397 km = 3.397 x 10⁶ m
Distance traveled = 2πr = 2 x π x 3.397 x 10⁶ = 2.13 x 10⁷ m
Time taken = 24.6 hours = 24.6 x 60 x 60 = 88560 s
[tex]\texttt{Tangential speed =}\frac{2.13\times 10^7}{88560}=240.51m/s[/tex]
Tangential speed of objects on the planet’s surface = 240.51 m/s = 241 m/s
The tangential speed of objects on Mars' surface is approximately 242 m/s, calculated using the planet's circumference and rotation time.
To calculate the tangential speed of objects on Mars' surface, we first find the circumference of Mars using the formula:
Circumference=2π×radius=2π×3,397km≈21,371km.
Next, convert the time taken for one rotation from hours to seconds:
24.6hours×60minutes/hour×60seconds/minute≈88,560seconds.
Now, calculate the tangential speed using the formula:
Tangential Speed= Circumference / Time taken for one rotation
Tangential Speed≈ 21,371km / 88,560seconds ≈0.2417km/s≈241.7m/s.
Rounding to the nearest whole number, the approximate tangential speed of objects on Mars' surface is ≈242m/s.
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Matt (m = 80 kg) and Trey (m = 90 kg) slide across an ice skating rink and collide with each other.
Before the collision, Matt was moving 3 m/s to the east and Trey was moving 2 m/s to the west.
After the collision, Matt is moving 1.5 m/s to the west.
a. What was the total momentum of the system before the collision? (1 point)
(80kg)(3m/s)+(90)(-2m/s)=60N*s
Answer:
Total momentum of the system before the collision is 60 kg-m/s.
Explanation:
Given that,
Mass of Matt, m = 80 kg
Mass of Trey, m' = 90 kg
Initial speed of the Matt before the collision, u = 3 m/s (east)
Initial speed of the Trey before the collision, u = -2 m/s (west)
After the collision, Matt is moving 1.5 m/s to the west.
We need to find the total momentum of the system before the collision. We know that the momentum is given by the product of mass and velocity. Initial momentum is given by :
[tex]p_i=mu+m'u'\\\\p_i=80\times 3+90\times (-2)\\\\p_i=60\ kg-m/s[/tex]
So, the total momentum of the system before the collision is 60 kg-m/s. Hence, this is the required solution.
HELP PLEASE!!! 30+ points!!
a book is 9.26 cm tall and placed 22.7 cm to the left of a plane mirror. What is the height of the image formed by the mirror?
4.63
18.5
2.45
9.26
a book is 9.26 cm tall and placed 22.7 cm to the left of a plane mirror. What is the magnitude of the image distance?
22.7
9.26
24.5
11.4
You move away from a plane mirror at a speed of 1.60 m/s. At what speed does your image move away from you?
1.60 m/s
3.20m/s
6.40m/s
0.40m/s
1) 9.26 cm
Explanation:
The focal length of a plane mirror is virtually infinite. Considering the lens equation,
[tex]\frac{1}{f}=\frac{1}{p}+\frac{1}{q}[/tex]
where f is the focal length, p is the object distance, q the image distance. If we replace f with infinity, we get
[tex]q=-p[/tex]
The magnification equation states that
[tex]y' = -\frac{q}{p}y[/tex]
where y is the size of the object and y' the size of the image. Substituting q=-p, we get
[tex]y'=y[/tex]
this means that the image produced by a plane mirror is always:
- Upright (y' is positive)
- The same size as the object
In this case, we have a book of height 9.26 cm (y=9.26 cm). This means that the magnitude of the size of the image (y') will be 9.26 cm as well.
2) 22.7 cm
As we said before, due to the infinite focal length of a plane mirror,
[tex]q=-p[/tex]
this means that the image produced by a plane mirror is always:
- Virtual (because q is negative)
- At the same distance from the mirror as the object
In this case, we have a book placed at 22.7 cm from the mirror (p=22.7 cm). This means that the magnitude of the distance of the image from the mirror (q) will be 22.7 cm as well.
3) 1.60 m/s
We said previously that the image produced by a plane mirror is always at the same distance from the mirror as the real object. This implies that whenever we move the object toward/away from the mirror, the distance p will alway remain equal to the distance q. But this also means that the object and the distance are moving toward/away from the mirror at the same speed.
Therefore, since in this case the person is moving away from the mirror at 1.60 m/s, the image will also move away at a speed of 1.60 m/s.
What parts are found in an electric generator? Check all that apply
An electric generator primarily consists of wire loops which rotate within a magnetic field, generating an AC voltage that drives an AC current. The mechanical energy to rotate the wire loops can be derived from various sources like hydropower, fossil fuels, or wind energy. Another important component is the commutator or slip rings.
Explanation:The essential parts of an electric generator are the wire loops and a magnetic field. An external source provides mechanical energy that drives the wire loops to rotate within the magnetic field. This mechanical action generates an alternating current (AC) voltage which in turn drives an AC current through the wire loops.
The source of this mechanical energy can be various, such as falling water (used in hydroelectric power), steam produced by the burning of fossil fuels (used in coal or natural gas power plants), or the kinetic energy of the wind (used in wind turbines). Another key part of the electric generator is the commutator or slip rings, which help in transferring the produced electric current from the rotating part of the generator to the stationary part.
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What is magnetism ?
Hello There!
As you already know, magnetism is invisible. Magnetism comes from minerals that are found in the Earth. The earth has so many minerals so our planet is basically a giant magnet. The most common mineral that can be made into a magnet is Iron.
What type of relationship does this graph show?
a negative relationship
an inverse relationship
a non-linear relationship
a direct relationship
Negative because the graph goes down
Answer:
Negative because the graph goes down
Explanation:
A spaceship hovering over the surface of Venus drops an object from a height of 17 m. How much longer does it take to reach the surface than if dropped from the same height on Earth? Neglect air resistance in both cases.
Explanation:
It is given that,
A spaceship hovering over the surface of Venus drops an object from a height of 17 m, h = 17 m
Acceleration due to gravity on the surface of Venus, [tex]g'=8.87\ m/s^2[/tex]
The second equation of motion is given by :
[tex]s=ut+\dfrac{1}{2}gt^2[/tex], u = 0
[tex]s=\dfrac{1}{2}gt^2[/tex]
[tex]t=\sqrt{\dfrac{2s}{g'}}[/tex]
[tex]t=\sqrt{\dfrac{2\times 17}{8.87}}[/tex]
t' = 1.95 s..............(1)
Acceleration due to gravity on the surface of Earth, [tex]g=9.8\ m/s^2[/tex]
Again using second equation of motion to find the time taken on the surface of earth.
[tex]s=ut+\dfrac{1}{2}gt^2[/tex], u = 0
[tex]s=0+\dfrac{1}{2}gt^2[/tex]
[tex]t=\sqrt{\dfrac{2\times 17}{9.8}}[/tex]
t = 1.86.................(2)
Change in time, [tex]\Delta t=t'-t=1.95-1.86=0.089\ s[/tex]
So, on the surface of earth it will taken 0.089 seconds more. Hence, this is the required solution.
Final answer:
When an object is dropped from a height on Venus, it takes longer to reach the surface compared to Earth due to the smaller acceleration due to gravity on Venus. It takes approximately 1.56 times longer for the object to reach the surface on Venus than on Earth.
Explanation:
When an object is dropped from a height on Venus, it will take longer to reach the surface compared to dropping the same object from the same height on Earth. This is because the acceleration due to gravity on Venus is smaller than on Earth. Gravity on Venus is about 0.904 times the gravity on Earth.
To calculate the time taken to reach the surface on Venus, we can use the equation:
t = sqrt((2h) / g)
Where h is the height and g is the acceleration due to gravity.
Let's assume the acceleration due to gravity on Earth is 9.8 m/s^2 and the acceleration due to gravity on Venus is 0.904 times that value. Plugging in the values, we get:
time on Venus = sqrt((2 * 17) / (0.904 * 9.8))
Simplifying the equation, we find that it takes approximately 1.56 times longer for the object to reach the surface when dropped on Venus compared to Earth.
If a foam cube 20 cm on a side has a density of 300kg/m^3 is placed in fresh water, how much of the cube will be underwater?
Answer:
6 cm
Explanation:
The weight of the water displaced equals the weight of the cube.
mg = ρVg
m = ρV
The mass of the cube is its density times its volume, and volume of a cube is the side length cubed.
The volume of the water displaced is the area times the depth.
(300 kg/m³ * (0.20 m)³) = (1000 kg/m³) ((0.20 m)² h)
2.4 kg = 40 kg/m h
h = 0.06 m
h = 6 cm
So 6 cm of the cube will be underwater.
all the planets in the solar system have ____ except for mercury and venus?
Answer:
have moon except merc and Venus
A boy pushes a toy car with the force of 50N. The force of friction as the car moves is 5N. What is the net force on the car
Explanation:
The first Newton Law of Motion states that an object at rest or describing a uniform straight line motion (moving at constant velocity), will remain at rest or moving unless a force is applied to it and changes its state of rest or motion.
According to his law, an object in rest can be in equilibrium (net force equals to zero), and a moving object can also be in equilibrium, as long as it keeps a constant velocity.
So, in the case of the toy car the forces acting on it (considering there is equilibrium between the normal force and the weight of the toy) are:
F1=50 N in the direction of the movement of the car
F2=-5 N (in the opposite direction of the movement of the car, that s why it has the negative sign)
Therefore the net force F is:
F=F1+F2=50N - 5 N
F=45N
SO what exactly is beyond our atmosphere, like space, has anybody actually been in space ????? or are we just making hopeless fantasies
Answer:
The universe, milky Way even black holes. Yes the first people who went to the moon put a flag to represent America. We are not making hopeless fantasies.
Explanation:
1A, 3B, and 7A are examples of
__________
on the periodic table.
Answer:
1 A, 3 B, and 7 A are examples of group number on the periodic table.
Explanation:
The table that consists of elements arranged systematically on the basis of atomic numbers is called periodic table. Groups and periods are two important part of a periodic table. A periodic table contains seven horizontal rows, called as periods and 18 vertical columns, called group.
The groups name is given in the form of number and alphabets. It represents the columns present in the periodic table.
Hence, 1 A, 3 B, and 7 A are examples of group number on the periodic table.
Answer:
group number
Explanation:
What must be true about tow objects if heat is flowing between them?
Explanation:
They have different temperatures. Heat always flows from high temperature to low temperature.