Answer:
Inelastic collisions actually do conserve energy, but the loss of energy to heat and mechanical vibration is hard to calculate so the math equating energy before and energy after is hard to balance.
Answer:
zero
Explanation:
For a solid conducting sphere, charges are present on the surface of the sphere due to a phenomenon known as electrostatic sheilding. This affects the charge present in the body and makes it zero. However, the electrostatic potential appears to be equal to the whole present point that shows on the surface. The surface of a spherical conducting solid sphere is known as an equipotential surface. Thus, the potential difference between the two opposite points on the surface of the sphere will also be zero.
An electric motor converts electrical energy into physical movement. Electric motors generate magnetic fields with electric current through a coil. The magnetic field then causes a force with a magnet that causes movement or spinning that runs the motor.
Answer:
the expression is ΔT = v²/(4*c)
Explanation:
the kinetic energy K of the bullet is given by
K=1/2*m*v²
where m= mass , v= velocity
the heat Q absorbed by the bullet is given by
Q = m * c * ( T final - T initial ) , where c= specific heat of lead, T initial = initial temperature, T final = final temperature
then
thermal energy = kinetic energy converted into thermal energy
Q = K - 1/2* K = 1/2*K
replacing values
m * c * ( T final - T initial ) = 1/2* 1/2*m*v² = 1/4*m*v²
the increase in temperature ΔT = ( T final - T initial ) , then
ΔT = ( T final - T initial ) = 1/4*m*v² /(m * c ) = v²/(4*c)
ΔT = v²/(4*c)