a) dU=Q-A, so DU=400 J
b) When you decrease heat while increase work and when you increase work while decreasing heat.
c) It takes heat from colder places and releases the heat to warmer places.
d) Because the order there is made by human.
Answer: 0.0328 A
Explanation:
Given
No of turns
Length of solenoid
Magnetic field
the magnetic field at the center of the solenoid is
Putting values we get
Answer:
Explanation:
I got this answer from Penn Foster. I hope this helps!
Answer:
753.9Watts
Explanation:
Given parameters:
Mass of the student = 75kg
Height = 4m
Time = 4.9s
Unknown:
Power exerted by the student = ?
Solution:
To solve this problem, we must know that power is the rate at which work is done.
Power =
Work done = mgh
m is the mass
g is the acceleration due to gravity
h is the height
Power = = 753.9Watts
Answer:
Work, energy and power are inter-related and interdependent. Let's see how, Work- Energy is needed for work. Power- It is the effectiveness of doing work. It is the rate of doing work. Energy- It is the capacity or potential to work.
Thank you