All categories

2 years ago

Question 4 (1 point)

Physics

1 answer:

djverab [1.8K]2 years ago

5 0

Answer:

directly proportional.

Explanation:

Coulomb's has the formular :

F = kQ₁Q₂ / d²

from the formular F = force

also from the formular Q = charge

hence, from the equation above, force and charge are directly related.so if the charge doubles, the force exerted by it on another charge also doubles because they are directly proportional.

You might be interested in

A 25 newton force applied on an object moves it 50 meters. The angle between the force and displacement is 40.0°. What is the va

zloy xaker [14]

Answer:

The value of work being done on the object is 958J.

Explanation:

Work done is equal to force multiply by distance, but when the angle is between the force and distance work done=Force (cos theta) × distance

Work done = Force(cos theta) × distance

Work done = 25N(cos 40.0°) × 50m

Work done = 25N(0.7660) × 50m

Work done = 19.15N × 50m

Work done = 957.5J = 958J

Therefore the value of work being done on the object is 958J.

3 0

1 year ago

Compare the percent change in angular momentum of the system to the percent change in the rotational kinetic energy of the syste

Lapatulllka [165]

Answer:

change in the angular momentum gives a greater change in the kinetic energy since it has a quadratic dependence with the angular velocity

Explanation:

Let's write the definition of angular momentum

L = I w

the kinetic energy is

K = ½ I w²

w = L / I

we substitute

K = ½ I L² / I²

K = L² / 2I

K / L = w / 2

therefore a change in the angular momentum gives a greater change in the kinetic energy since it has a quadratic dependence with the angular velocity

8 0

3 years ago

An objest with the mass of 2 kg is accelerated at 4 m/s2. the net force acting on the object is

poizon [28]

From Newton’s 2nd law of motion
F=ma
= 2*4
=8N

8N should be the answer

5 0

2 years ago

Which description correctly summarizes how an electric motor causes an axle to turn?

Tasya [4]

Answer:

The poles of the magnetic field generated around the armature are attracted to the opposite poles of the permanent magnet. As the opposite poles align, the commutator reverses the current direction so like poles are aligned and the armature continues to spin.

Explanation:

3 0

3 years ago

A planet has a period of revolution about the sun equal to T and a mean distance from the sun equal to R. T2 varies directly as

Tamiku [17]

Answer:

T² ∝ R³

Explanation:

Given data,

The period of revolution of the planet around the sun, T

The mean distance of the planet from the sun, R

According to the III law of Kepler, " Law of Periods' states that the square of the orbital period to go around the sun once is directly proportional to the cube of the mean distance between the sun and the planet.

T² ∝ R³

$\frac{T^{2}}{R^{3}} = Constant$

From the above equation it is clear that T² varies directly as the R³.

7 0

3 years ago