Answer:
The correct answer is the acceleration will decrease.
Explanation:
This refers to Newton's second law, where it is established that if a force acts on an object, the object accelerates in the sense of force.
And if the mass of this object is continuous, as the force increases the acceleration will grow. But if what remains constant is force, and what we increase is mass, then the acceleration will be less.
To understand it in a simpler way, let's think about horses and a carriage. The horses begin to pull hard from a carriage, whose mass will remain the same all the way. If this movement continues, then the carriage will start to go faster.
But suppose we change the mass of the carriage, adding two men of 100 kg each. The strength of the horses remains the same, and remains constant. But having a greater mass to move, the carriage will lose speed.
A player kicks a football from ground level with a velocity of 26.2m/s at an angle of 34.2° above the horizontal. How far back from a field goal (whose bar is at 4.0m) could the kicker be and still make a goal?
For the ball to go straight into the goal, the kicker needs to be no more than 6.54 meters away from the goal.
For the ball to arc into the goal, the kicker needs to be between 58.5 and 65.1 meters away from the goal.
ExplanationHow long does it take for the ball to reach the goal?
Let the distance between the kicker and the goal be [tex]x[/tex] meters.
Horizontal velocity of the ball will always be [tex]26.2\times\cos{34.2\textdegree}[/tex] until it lands if there's no air resistance.
The ball will arrive at the goal in [tex]\displaystyle \frac{x}{26.2\times\cos{34.2\textdegree}}[/tex] seconds after it leaves the kicker.
What will be the height of the ball when it reaches the goal?
Consider the equation
[tex]\displaystyle h(t) = -\frac{1}{2}\cdot g\cdot t^{2} + v_{0,\;\text{vertical}} \cdot t + h_0[/tex].
For this soccer ball:
[tex]g = 9.81\;\text{m}\cdot\text{s}^{-2}[/tex],[tex]v_{0,\;\text{vertical}} = 26.2\times \sin{34.2\textdegree{}}\;\text{m}\cdot\text{s}^{-2}[/tex],[tex]h_0 = 0[/tex] since the player kicks the ball "from ground level."[tex]\displaystyle t=\frac{x}{26.2\times\cos{34.2\textdegree}}[/tex]
when the ball reaches the goal.
[tex]\displaystyle h= - 9.81 \times \frac{x^2}{(26.2\times\cos{34.2\textdegree})^2} + (26.2 \times \sin{34.2\textdegree})\times\frac{x}{26.2\times\cos{34.2\textdegree}} \\\phantom{h} = -\frac{9.81}{(26.2\times\cos{34.2\textdegree})^2}\cdot x^{2} + \frac{\sin{34.2\textdegree}}{\cos{34.2\textdegree}}\cdot x[/tex].
Solve this quadratic equation for [tex]x[/tex], [tex]x > 0[/tex].
[tex]x = 65.1[/tex] meters when [tex]h = 0[/tex] meters.[tex]x = 6.54[/tex] or [tex]58.5[/tex] meters when [tex]h = 4[/tex] meters.In other words,
For the ball to go straight into the goal, the kicker needs to be no more than 6.54 meters away from the goal. For the ball to arc into the goal, the kicker needs to be between 58.5 and 65.1 meters away from the goal.Two wave pulses move toward each other along a rope.
Which diagram shows the resulting wave when they cross at point X?
Answer:
The answer is B. It is the one that has the triangle pointing up on the topside of the rope and seems to be a bit bigger than the other triangles.
Explanation:
Answer:
The second option with a vertex pointing upwards.
Explanation:
A wave is a disturbance that can be transmitted through a medium without causing a permanent displacement of the particles of the medium. The two types are; longitudinal and transverse.
In transverse wave, the direction of propagation of the wave is perpendicular to the direction of vibration of the particles of the medium. Examples are; water waves, light waves, X-ray etc. While in longitudinal waves, the direction of vibration of the particles is parallel to the direction of propagation of the waves. Examples are; waves in a slinky, waves in a rope, sound waves etc.
A wave in a rope is a form of longitudinal waves. When two wave pulses move toward each other, interference is observed.
What can cause a change in the direction of a magnetic field?
The changing magnetic field caused by the material's motion induces a current in the coil of wire proportional to the change in field. If a 0 is represented, the magnetic field does not change between the two domains of a bit, so no current is induced as the magnetic material passes the coil.
Answer:
Change in the direction of current in a wire will change the magnetic field caused by that wire
Explanation:
As we know by Biot Savart law that magnetic field due to a current carrying element is given by
[tex]dB = \frac{\mu_o i (\vec {dL} \times \hat r)}{4\pi r^2}[/tex]
so here if the direction of current in the wire reversed then it will change the direction of length vector
This will reverse the direction of magnetic field at a given space
So magnetic field produced by a current carrying element only depends on the direction of the current so on reversing the direction of current we can change the magnetic field direction
The ability to do work or cause change is called ?
energy is the ability to do work or change
Final answer:
Energy is defined as the capacity to do work or cause change, with work being a transfer of energy in the form of a force moving an object over some distance.
Explanation:
The ability to do work or cause change is called energy. When we use energy to perform tasks, such as throwing a ball or warming a house, we are actually transferring energy from one object or system to another. This transfer can occur in the form of work or heat. Specifically, work is done when a force causes matter to move against an opposing force. An example of this would be when you inflate a bicycle tire; you are doing work on the tire by moving air into it against the pressure of the air inside the tire.
In the realm of physics, work is quantified as the product of force exerted on an object and the distance the object moves as a result, which is mathematically expressed as W = F x Δx. The work-energy theorem further relates this work to changes in an object’s kinetic energy, supporting the idea that energy is essential for doing work and causing changes.
If you know the input distance in the output distance of a machine what do you calculate
[tex]\bf slope = m = \cfrac{rise}{run} \implies \cfrac{ \stackrel{out put}{f(x_2) - f(x_1)}}{ \stackrel{in put}{x_2 - x_1}}\impliedby \begin{array}{llll} average~rate\\ of~change \end{array}[/tex]
What is the centripalaccele
Answer:
[tex]96 m/s^2[/tex]
Explanation:
Centripetal acceleration is given by:
[tex]a_c = \omega^2 r[/tex]
where
[tex]\omega[/tex] is the angular frequency
r is the radius of the trajectory
In fan completes 2 rotations every second, so its frequency is
[tex]f=\frac{2}{1.0 s}=2 Hz[/tex]
And the angular frequency is
[tex]\omega=2\pi f=2\pi(2 Hz)=12.6 rad/s[/tex]
The radius of the trajectory is
r = 0.61 m
So, the centripetal acceleration is
[tex]a=(12.6 rad/s)^2 (0.61 m)=96.8 m/s^2 \sim 96 m/s^2[/tex]
what does the delta symbol represent in the equation
Delta means change usually
Answer: A) Change in velocity
Explanation:
USA test prep
Use the law of conservation of mass to explain why a chemical equation must be balanced
The chemical equation needs to be balanced so that it follows the law of conservation of mass. A balanced chemical equation occurs when the number of the different atoms of elements in the reactants side is equal to that of the products side. Balancing chemical equations is a process of trial and error.
In a closed all mass is conserved. tThe Conservation of mass explains the balanced chemical equation.
Conservation of mass:This law states that in a closed system the mass of the total mass of all reactants is equal to the total mass of products in a reaction.
For example -
[tex]\bold {CH_4 + 2O_2 \rightarrow2 H_2O +CO_2}[/tex]
1 mole of methane reacts with 2 moles of oxygen to produce 2 moles of water and 1 mole of Carbon dioxide.
Means 3 moles or reactant 3 moles of products.
Therefore, the Conservation of mass explains the balanced chemical equation.
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if jack was traveling at 100 miles in 2 hours what was his velocity in miles per second
1 hour is 3600 seconds. In 2 hours, it would be 7200 seconds. Divide the amount of miles by seconds. 100/7200=.01388..
We don't know anything about the direction Jack was traveling, so we can't determine his velocity. The best we can do is work with his speed.
Speed = (distance covered) / (time to cover the distance)
Speed = (100 miles) / (2 hours)
Speed = 50 miles/hour
The question has specified a different unit, so we'll need to convert the unit of our answer.
Let's multiply the answer by (1 hour / 3600 seconds). The numerator and denominator of this fraction are both the same quantity, so the value of the fraction is ' 1 ', and multiplying the answer by it won't change the answer in any way except the unit.
Speed = (50 mi / hr) x (1 hr / 3600 sec)
Speed = (50mi · 1hr) / (hr · 3600sec)
Speed = 50 mi / 3600 sec
Speed = 0.01389 mi/sec
Sayid drew an energy pyramid. What does each section of the triangle represent?
Pyramid of numbers: relative number of individual organisms at each trophic level in an ecosystem. Pyramids of energy show the relative amount of energy available at each trophic level. On average, about 10 percent of the energy available within one trophic level is transferred to the next trophic level.
HOPE THIS HELPED!!! XD
Represents a:
A Trophic Level
What is the processing of information and other input into your memory called?
A. Sensory representation
B. Encoding
C. Storage
D. Conditioning
Answer:
B. Encoding
Explanation:
Memory is the set of processes used to encode, store, and retrieve information over different periods of time.Encoding is the process through which we get information into our brains. It involves the input of information into the memory system. Storage on the other hand is the retention of the encoded information. Retrieval involves getting the information out of memory and back into awareness, is the third function.Encoding is the processing of information and input into memory.
Explanation:The processing of information and other input into your memory is called encoding. Encoding is the input of information into the memory system. It involves labeling or coding sensory information and connecting new concepts to existing concepts. Encoding can occur through automatic processing or effortful processing.
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two stars are the same distance from us. what can you use to determine which star is brighter?
A.)parallax
B.) absolute magnitude or apparent magnitude
C.) only apparent magnitude
The correct answer is B.
Explanation
Astronomers use both apparent magnitude and absolute magnitude to define how bright a star is. By way of apparent magnitude, astronomers gauge how bright the star seems from the Earth, and b way of absolute magnitude, astronomers gauge how bright the star seems from 10 parsecs/32.6 light years which is a set standard distance.
Hope this helpsWhich parts of the spectrum show the presence of elements in the stars atmosphere
Answer:
the one right behind 600 and the one in between 600 and 700
Explanation:
Final answer:
Scientists determine the presence of elements in the stars' atmospheres by analyzing their atomic spectra, which are obtained by spreading out the light emitted by stars into a spectrum using a spectrograph. The spectrum shows dark lines or absorption lines that indicate the presence of specific chemical elements.
Explanation:
Scientists determine what elements are present in distant stars by analyzing the light that comes from stars and finding the atomic spectrum of elements in that light. By using a spectrograph to spread out the light into a spectrum, scientists can observe the presence of elements in the stars' atmospheres. The spectrum shows dark lines or absorption lines that are produced by atoms in the atmospheres of stars and absorb light at certain wavelengths, providing evidence of the presence of specific chemical elements.
which would be an example of your emotional brain at work?
Answer:
the amygdala, the prefrontal cortex, the cingulate cortex, the hippocampus, and the basal ganglia
Explanation:
These are the regions of the brain that read emotions
(not sure if i answered correctly but i tried. )
An example of the emotional brain at work is the activation of the amygdala during stress, which can trigger a fight-or-flight response. Emotional intelligence involves managing these reactions to make balanced decisions, highlighting the intertwined nature of emotion and rational thought in our cognitive processes.
An example of the emotional brain at work can be seen when you react to a stressor, such as an argument with a friend. In this situation, your amygdala, a part of the limbic system, gets activated. The amygdala processes emotional responses and is known for its role in fear and other emotions. It sends a distress signal to the hypothalamus, which can trigger a fight-or-flight response, involving the release of stress hormones and activation of the sympathetic nervous system.
This reaction is not always rational and can sometimes be too quick, bypassing logical thought processes. However, emotional intelligence at work involves recognizing these emotional responses, understanding their impact, and managing them effectively to make balanced decisions. As research suggests, emotions are integral to rational thinking, and a lack of emotional response due to brain injury can make decision-making difficult and lead to significant life issues.
Which of the following is the best hypothesis for this experiment? (Remember that the variable we are going to manipulate is the IF part of a hypothesis and the variable we hope will respond and we will measure is the THEN part of a hypothesis.) Question 1 options: a. If I increase the pressure outside of an air filled balloon, then the balloon will become smaller b. If I increase the temperature of the air in a balloon, then the balloon will become larger. c. If I increase the size inside of a balloon, then the air in the balloon will become hotter.
answer would be A becuz that's the only reasonable choice according to real life situations
The best hypothesis for this experiment is that if I increase the pressure outside an air-filled balloon, then the balloon will become smaller. Hence, option (a) is correct.
What is Pressure?The force perpendicularly applied to an object's surface divided by the area over that it is dispersed is known as pressure. The pressure as compared with the surrounding air pressure is referred as gauge pressure.
To express pressure, a variety of measures are employed. Some of these come by dividing a unit of force by a unit of area; for instance, the SI unit of pressure, the pascal (Pa), is equivalent to one newton per square meter (N/m2), whereas the conventional unit of pressure in the metric and U.S. conventional systems is the pound-force per square inch (psi).
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What is the force, in units of femtoNewtons, on an electron moving at a velocity of 7.26 x 106 ms-1 perpendicularly to a magnetic field when the magnetic flux density of 0.049 T?
Answer:
56.9 fN
Explanation:
The force exerted on the electron is:
[tex]F=Bqv[/tex]
where
B is the magnetic field strength
q is the electron's charged
v is the speed of the electron
In our problem,
B = 0.049 T
[tex]q=1.6\cdot 10^{-19} C[/tex]
[tex]v=7.26\cdot 10^6 m/s[/tex]
Therefore, the force is
[tex]F=(0.049 T)(1.6\cdot 10^{-19} C)(7.26\cdot 10^6 m/s)=5.69\cdot 10^{-14} N=56.9 fN[/tex]
Two objects have charges 2.0 C and 1.0 C. If the objects are placed 2 meters apart, what is the magnitude of the force that the 2 C object exerts on the 1 C obejct?
Answer:
[tex]4.5\cdot 10^9 N[/tex]
Explanation:
The electric force between two charged objects is given by:
[tex]F=k\frac{q_1 q_2}{r^2}[/tex]
where:
k is the Coulomb's constant
q1 and q2 are the charges of the two objects
r is their separation
In this problem:
q1 = 2.0 C
q2 = 1.0 C
r = 2 m
So, the electric force is
[tex]F=(9\cdot 10^9 Nm^2C^{-2})\frac{(2.0 C)(1.0 C)}{(2 m)^2}=4.5\cdot 10^9 N[/tex]
6. The magnitude of the force that the 2 C object exerts on the 1 C object is 4.495 * 10^9 N. Option C is the right choice.
7. Only increasing the combined charge of both spheres increases the electrical force between them. Option C is the right choice.
6.
The force between two charged objects is given by Coulomb's law:
F = k * |q1 * q2| / r^2
where:
F is the force between the two charges
k is Coulomb's constant, approximately equal to 8.99 * 10^9 N⋅m^2/C^2
q1 and q2 are the magnitudes of the charges of the two objects
r is the distance between the two objects
In this case, q1 = 2.0 C, q2 = 1.0 C, and r = 2 meters. Plugging these values into Coulomb's law, we get:
F = 8.99 * 10^9 N⋅m^2/C^2 * |2.0 C * 1.0 C| / (2 meters)^2
F = 4.495 * 10^9 N
So the answer is Option C. 4.495 * 10^9N.
7.
The electrical force between two charged spheres depends on the magnitude of their charges and the distance between them, as described by Coulomb's Law.
Increasing the combined mass of the spheres, the diameter of one sphere, or the distance between them has no effect on the force.
Therefore, the only option that increases the force is to increase the combined charge of both spheres. Option C is the right choice.
which pair of objects will have the least gravitational attraction to each other
A: 2 concrete blocks 6 cm apart
B: 2 marbles 12 cm away
C: A concrete block and a marble 6 cm apart
D: A concrete block and a marble 12 cm apart
Hey i am here to help you.
A: 2 concrete blocks 6cm apart will have the least gravitational attraction to each other.
I believe that this answer was helpful.
Describe the relationship between gravitational force, mass, and distance. Also answer if doubling mass or doubling distance would result in a greater increase in the gravitational force.
The gravitational force depends on the mass of objects and the distance between them, doubling in force with double the mass and reducing to one-fourth with double the distance due to the inverse-square law.
Explanation:The relationship between gravitational force, mass, and distance is governed by the universal law of gravitation. According to this law, the gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This can be expressed by the formula F = G (m1*m2) / d2, where F is the gravitational force, G is the gravitational constant, m1 and m2 are the masses of the objects, and d is the distance between the centers of the two masses.
Doubling the mass of an object would result in a doubling of the gravitational force since force is linearly proportional to mass. Conversely, doubling the distance between two objects would result in the gravitational force being reduced to a quarter of its original value, as the force is inversely proportional to the square of the distance. Therefore, doubling the distance has a more significant effect in decreasing the gravitational force than doubling the mass has in increasing it.
A 6-newton object is raised 12 meters. How much work is done?
Work = 6N x 12 meters = 72 J
The work done in lifting a 6-newton object by 12 meters is 72 joules.
When a 6-newton object is raised 12 meters, the work done can be calculated using the formula Work (W) = [tex]force (F) imes[/tex] distance (d). In this case, the force is equivalent to the weight of the object since it is being lifted against gravity. Thus, the work done is calculated as W = (6 N)(12 m) = 72 joules (J). Remember, work is the product of the force applied to an object and the distance the object moves in the direction of the force.
a car engine changes chemical potential energy into the blank energy of the moving car
Kinetic energy
A car engine changes chemical potential energy into the kinetic energy of the moving car.
Explanation;A car engine converts potential chemical energy stored in gasoline into thermal energy and then into kinetic mechanical energy.When gasoline undergoes combustion it reacts with oxygen to produce carbon dioxide and water vapor.Gasoline is a mixture of octane and similar hydrocarbons and contains potential chemical energy.The hot exhaust gases from the combustion of gasoline that are produced within the cylinder expand and exert pressure, moving the piston in the cylinder outward then inward as the gas is exhausted. Kinetic mechanical energy of the moving pistons is transferred to the drive shaft and eventually to the wheels, giving the car kinetic mechanical energy.Which best describes the relationship between the frequency, wavelength, and speed of a wave as the wave travels through different media
As speed changes, wavelength changes and frequency stays constant. (1)
Answer:
As speed changes, wavelength changes and frequency stays constant.
Explanation:
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A ------ and a-------- are examples of inclined planes.
CHOICES FOR FIRST BLANK: lever and wedge
CHOICE FOR SECOND BLANK:Pulley and screw
My guess is Wedge & Pulley
What data are needed to calculate the actual mechanical advantage of a machine? efficiency and force of friction input distance and output distance work input and work output input force and output force
input force and output force
Explanation;Mechanical advantage of a machine is the number of times that the machine increases an input force. Actual mechanical advantage is equal to the ratio of the output of force to the input of force .ideal mechanical advantage is the mechanical advantage take place in the absence of friction. ideal mechanical advantage = input distance/output distanceBecause friction is always present, the actual mechanical advantage is always less than the ideal mechanical advantage .Answer:
input force and output force
2 What are the products of the following general reaction? acid + base _______ + _______ A. salt; water B. oxygen; hydrogen C. water; carbon dioxide D. metal; salt
Salt + water because salt dissolved in water
Which is true about the pressure of a fluid at a specific depth?
It varies with the total volume of the fluid.
It depends only on the type of fluid.
It is exerted only in the downward direction.
It depends on the surface area of the fluid.
It varies with the total volume of the fluid.
Explanation;Pressure and depth have a directly proportional relationship, due to the greater column of fluid that pushes down on an object submersed.The relationship between pressure and depth may be looked at with respect to the relationship between pressure and volume, as the column of fluid has a specific volume and corresponding to depth.Please help me with homework
Answer:
The coefficient of static friction between the hockey puck and the surface.
Explanation:
Static friction is the force that keeps an object from moving. A force must be applied enough to overcome the static friction to move the object. If a smaller force is applied on the object, there is an equal opposite force by static friction against it.
Force of static friction can be calculated if the coefficient of static friction is known.
Which of the following materials is an insulator against electric current?
A. Aluminum foil
B. A silver spoon
C. A copper penny
D. A glass pane
Answer: D. A glass pane
Explanation: Glass is a poor conductor of electricity. Aluminum, copper and silver are all good conductors of electricity.
A pane of glass can be used as an insulator against electric current because it is a poor conductor of heat.
Glass is made up of silica which is abundant in nature.
On earth you have a mass of 140kg in space you will have a mass of how many kg
If your mass is 140kg , then your mass is 140kg.
It doesn't make a bit of difference what time it is, whether you're happy or sad, sleeping or lifting weights or running, whether it's raining or shining, hot or cold, climbing a mountain or falling out of an airplane, on the surface of a planet, asteroid, comet or star, or floating or falling through empty lonely outer space. Your mass is your mass. The only way it can change is if YOU make changes in yourSELF, like eating a big steak, sweating through a long tough workout, or skipping dinner, or growing to maturity.
(I guess you're already pretty mature. If your mass is 140kg, then you weigh about 308 pounds when you're on Earth.)
140 kg. since earth and space have different gravity, you will weigh differently. you dont grow or shrink in size. Weight is just how much your pulling on the earth and how much the earth is pushing back. Its in Newtons 3 laws.
A ball is projected into the air. Where is potential energy the greatest? A) A. B) B. C) C. D) A. and C.
The point with the greatest potential energy is B.
The potential energy of an object is depends on the relative distance between the object and the ground and its mass. The higher the object is from the ground the greater the potential energy posses.
Potential energy (P.E) = mgh
Where m is the mass, g is the gravity and h is the height from the ground to where the object is.
Since the mass and gravity is constant in this case, only the height will determine the point with the greatest P.E and that point is B.