What factors affect the strength of the electric force between two objects

Answers

Answer 1

Answer: There are three factors:

The charge of the two objects. The electric force is proporcional to the product of the charges of both objects.

The distance that separetes them. The electric force is proportional to the inverse of the squared distance that separates the objects.

The media. The electric force constant of proportionality depends on the media: air, water, oil, glass.

Answer 2

Answer:

Answer:c or 3 or the distance between the objects and the amount of charge on the objects

Explanation:

Bc i know it pls give me brainliest

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A 1000-kg car is moving along a straight road down a 30∘ slope at a constant speed of 20.0m/s. What is the net force acting on the car?

Answers

Answer:

net force acting on the car is zero

Explanation:

given data

mass of car = 1000 kg

slope = 30°

constant speed = 20.0 m/s

to find out

net force acting on the car

solution

we know here that car is moving with given 20 m/s velocity so here net force acting on the car will be zero

as net force is express as

Force = mass × acceleration .....................1

and here acceleration is change of velocity per change in time

and here change in velocity is 0

so that net force will be zero

so net force acting on the car is zero

Final answer:

In this scenario, the car is moving at a constant speed down a slope, which according to Newton's first law of motion, means that the net force acting on the car is zero.

Explanation:

The key to figuring out this problem lies within understanding Newton's first law of motion which states that an object will stay in constant motion as long as the net force acting upon it is zero. In this case, the car is moving at a constant speed implying that the net force, or the sum of all forces acting on it, equals zero. As the car moves down a slope, there's the force of gravity pulling it downwards and the normal force from the road acting upwards. When the car moves in a constant speed, these two forces are balanced, making the net force zero (0 Newtons).

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You step off of a ledge and land 0.5 seconds later. How high was the ledge?

Answers

1.25m

hope this is what you needed

1.25m

hope this is what u needed

Weather differs from climate in that weather can change on a daily basis and is not considered a description of year-to-year conditions of temperature and precipitation.

Answers

The statement that weather differs from climate in that weather can change on a daily basis and is not considered a description of year-to-year conditions of temperature and precipitation is true. While the climate pertains to the atmospheric conditions over long periods of time.

Answer: true

Explanation:

got it right on edge

A 400 kg object is sitting at rest at the top of a hill that is 30.0m high and 80.0m long measured along the hill . If there is no friction ,how fast will the object be going at the bottom of the hill?

Answers

The object be going at the bottom of the hill with velocity 7.75 m/s.

What is velocity?

When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time.

Given in the question a 400 kg object is sitting at rest at the top of a hill that is 30.0 m high and 80.0 m long measured along the hill . If there is no friction, velocity with which object be going at the bottom of the hill,

θ =sin^-1(30/80)

θ =22

F = 400 g sin(22) = 150 N

F = ma

150 = 400 a

a = 0.375 m/s²

v² - u²= 2 a s

v² - 0 = 2 x 0.375 x 80

v = 7.75 m/s

The object be going at the bottom of the hill with velocity 7.75 m/s.

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theater=sin^-1(30/80)
theater=22
F=400gsin22=150N
F=ma
150=400a
a=0.375ms^-2
v^2-u^2=2as
v^2-0=2x0.375x80
v=7.75ms^-1

5. Projectile A with mass m is launched at an angle of 20° above the horizontal with a speed v0. Projectile B also with mass m is launched from the same location at an angle of 70° above the horizontal, also with speed v0. Thus, both projectiles have the same initial total energy. a. Which projectile has a larger speed when it hits the ground or do they have the same speed? Explain using energy. b. Which projectile reaches a greater height? Given that both projectiles have the same initial energy, how is this possible?

Answers

Answer:

a) They both have the same final speed.

b) Projectile B reaches a greater height

Explanation:

The initial total energy of both projectiles is the same, and since the initial height is zero, that initial energy is entirely kinetic energy:

$E_0=K_0=(1)/(2)mv_0^(2)$

Now, when the projectiles are going to reach the ground, their height also becomes zero, so the final energy is also entirely kinetic energy:

$E_f=K_f=(1)/(2)mv_f^(2)$

As stated in the conservation of mechanical energy, the final total energy has to be equal to the initial total energy, and then:

$E_0=E_f\n \n (1)/(2)mv_0^(2)=(1)/(2)mv_f^(2)\n\n\implies v_0=v_f$

Finally, since the initial speed is the same for both projectiles, they have the same speed when they hit the ground (a).

Next, we know that the height reached by a projectile depends only of their initial vertical velocity, nor their horizontal one. So, the projectile with the highest initial vertical velocity has to reach a greater height. We use trigonometry to calculate that:

$v_0_A_y=v_0\sin20\°=0.34v_0\n\nv_0_B_y=v_0\sin70\°=0.93v_0$

It means that projectile B has a higher initial vertical velocity, so it reaches a greater height (b).

This is possible because some of the kinetic energy of both projectiles is never transformed to gravitational potential energy (because is related to the horizontal velocity) and this amount of kinetic energy depends on the angle at which the projectile is launched. As their potential energies at the highest points are different, their maximum heights are, too.

HELP!!! In the "Monster study," what did psychologists tell the group of orphans who did not suffer from stuttering?

A.

They were told that they weren’t really stutterers.

B.

They were told that they had very severe cases of stuttering.

C.

They were told that stuttering could be overcome with practice.

D.

They were told that their parents were responsible for their stuttering.

Please select the best answer from the choices provided

A

B

C

D

Answers

B. They were told that they had very severe cases of stuttering.

The Monster Study was conducted by Dr. Wendell Johnson to learn more about why children developed a stutter and to see if stuttering was a result of learned behavior. However, there are several ethical problems with the the Monster study.

In this study, psychologists tell the group of orphans who did not suffer from stuttering that they had very severe cases of stuttering.

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Answer:

They were told that they had very severe cases of stuttering.

Explanation:

The monster study conducted in 1939 was a certain stuttering experiment that was done by Wendell Johnson on 22 Orphan at the University of Iowa, United States. Eleven of the children got positive speech therapy while the other half was seen to have negative speech therapy which belittled them for their speech imperfections.

The experiment was called monster because many people were horrified that such experiments could be done on children who were orphans.

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How do elements change as you move down a column in a periodic table? a.the atomic radius decreases b.the number of protons decreases c.the atomic mass decreases d.the electronegativity decreases

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Why are some pots and pans designed with wooden handles?Wood is a conductor. Wood has a high heat capacity. Wood is an insulator. Wood is an organic substance.