Answer:
I already know the first one is electromagnetic but I don't know the second one sorry
Explanation:
Answer:
-80 J
Explanation:
The first law of thermodynamics states that:

where
is the change in internal energy of the system
Q is the heat absorbed by the system
W is the work done by the system
In this problem, we have:
Q = -30 J is the heat released by the system (negative because the system releases it)
W = +50 J is the work done by the system on the surrounding (positive since it is done by the system)
Therefore, the change in internal energy is

Answer:1.7 rev/s
Explanation:
Given
Frequency of wheel 
angular speed 
mass of wheel 
diameter of wheel 
radius of wheel 
mass of clay 
the radius of the chunk of clay 
Moment of inertia of Wheel

Combined moment of inertia of wheel and clay chunk

Conserving angular momentum

Common frequency of wheel and chunk of clay is

Answer: 100 m
Explanation:
Initial speed(u) = 40 m/s
Final speed(v) = 0 m/s
Acceleration = v-u/t
=> 0-40/5
=> 8 m/s^2
Displacement= s
=> 2as = v^2-u^2
=> 2(-8)(s) = 0 - (40)^2
=> -16s = -1600
s = 100 m
We can say the vehicle move 100 meters before stopping.
Aerospace engineering is responsible for a plane design