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4 years ago

Which would best describe what occurs when a ball is thrown against a wall

1 answer:

6 0

It depends on how hard the ball is one and so if its hard it might put a dent in the wall depending on how the ball is thrown at the wall and how hard the ball is and like any other way or big and small and other ways you have to pay attention on how hard it is, how hard you threw it, and how big it is

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A 6.89-nC charge is located 1.76 m from a 4.10-nC point charge. (a) Find the magnitude of the electrostatic force that one charg

iogann1982 [59]

Answer: a) 8.2 * 10^-8 N or 82 nN and b) is repulsive

Explanation: To solve this problem we have to use the Coulomb force for two point charged, it is given by:

$F=\frac{k*q1*q2}{d^{2}}$

Replacing the dat we obtain F=82 nN.

The force is repulsive because the points charged have the same sign.

5 0

3 years ago

Which of the following is not a part of a wave?

Alisiya [41]

B is the correct answer
y=Asin(wt-kx)
A=amplitude
f=frequency
x=wavelength
since refraction is not on the wave formula,then option B is the correct answer

5 0

3 years ago

Read 2 more answers

What is true of an object pulled inward in an electric field?

slava [35]

Answer:

option b

Explanation:

There is an object pulled inward in an electric field.

We have to find out of the four options given which is true.

a) The object has a neutral charge is false since when electric field pulls the object inward, there is a charge inside.

b) The object has a charge opposite that of the field, this option is correct since there will be an equal and opposite charge created by the object

c) The object has a negative charge will be correct only if the original charge was positive hence wrong

d) The object has a charge the same as that of the field is incorrect since this would be opposite the charge

So only option b is right

5 0

4 years ago

According to Newton's First Law (the Law of Inertia) -

Nana76 [90]

Answer:

Explanation:

I am snart plus I took the same test last year

3 0

3 years ago

Match the law of thermodynamics to its definition. 1. zeroth The tendency of the universe is to increase entropy. 2. first Two o

netineya [11]

Answer:

1. zeroth --> Two objects in thermal equilibrium will have no net heat flow between them.

2. first --> Heat can change energy from one form to another, but the amount of energy in the universe is constant.

3. second --> The tendency of the universe is to increase entropy.

Explanation:

1. The zeroth law of thermodynamics states that:

"If object A is in thermal equilibrium (=same temperature) with object B, and object B is in thermal equilibrium with object C, then object A and object C are in thermal equilibrium as well". According to this, there is no heat flow between two objects in thermal equilibrium: in fact, two objects in thermal equilibrium have same temperature, so they have same thermal energy, therefore heat does not flow spontaneously from one object to the other. Heat flows spontaneously only if there is a temperature difference between the two objects.

2. The first law of thermodynamics states that:

"The variation of internal energy of a system is given by the sum between the heat absorbed by the system and the work done by the surrounding on the system itself". In formula:

$\Delta U = Q + W$

where $\Delta U$ is the variation of internal energy of the system, Q is the heat absorbed by the system and W the work done by the environment on the system. A result of this law is that energy cannot be created nor destroyed, but only converted from one form to another.

3. The second law of thermodynamics states that:

"The total entropy of an isolated system can never decrease over time".

Entropy of a system is a measure of its degree of "disorder": the higher the entropy, the more disordered the system is. In nature, every system tends to go to a state of more entropy, and since the universe can be thought as an isolated system, the tendency of the universe is to increase its entropy.

8 0

3 years ago