Answer:
a)
b)
Explanation:
From the exercise we got final position, final velocity and how much time does it takes the body to cover the distance
From the concept of moving objects we know the following equations:
and
Now, we have two equations with two unknowns
(1)
Now, we need to replace (1) in the other equation
Solving for a
b)
Now, we can solve (1)
a)
Answer:
Explanation:
Given:
- Initial pressure of nitrogen,
- initial temperature,
- polytropic index,
- initial volume,
- work done in the process,
<u>For heat interaction during the polytropic process we have:</u>
<u>For ideal gas we have the Gas Law:</u>
<u>For work we have the relation:</u>
putting respective values
We know entropy change:
Answer:
392 Newtons
Explanation:
In order to find the weight, you have to multiply the mass by the gravitation constant (9.8), which gives us 40.0 * 9.8 = 392 Newtons.
Answer:
All the hairs on the child's head must gain the same type of charge. Like charges repel so the strands of hair experience a force that pushes them away from each other.
Explanation:
Regards: Your Friendly Study Co-Pilot!
Answer: For the given process it is true that the balloon has a net charge on it, but the wall may be neutral (have no net charge).
Explanation:
When we tend to rub a balloon against a woolen sweater then it is possible that the balloon might stick to the wall. This might be due to the increase in number of electrons on the balloon and the wall gets positively charged.
Since, opposite charges tend to attract each other hence, the balloon will stick to the wall.
A neutral object also tends to acquire a certain charge when it is rubbed by a charged object.
Therefore, we can conclude that the balloon has a net charge on it, but the wall may be neutral (have no net charge).