Answer:
thermal energy
Friction does negative work and removes some of the energy the person expends and converts it to thermal energy. The net work equals the sum of the work done by each individual force. The forces acting on the package are gravity, the normal force, the force of friction, and the applied force.
Explanation:
I attached a free body diagram for a better understanding of this problem.
We start making summation of Moments in A,



Then we make a summation of Forces in Y,



At the end we calculate the angle with the sin.


The density is 5.22 g/cm³.
Density=

Density=

Density= 5.22 g/cm³
Electromagnetic waves don't require medium to travel
Ex- light waves
Answer:
C
Explanation:
Most probable exchange of ions occurs for option C.