Let's convert the initial height from feet to meters first:

The object is in free fall, so it is moving by uniformly accelerated motion with constant acceleration

(gravitational acceleration) from initial height h=121.9 m. Its vertical position at time t is given by

We want to know how long it will take to reach the ground, therefore we should calculate the time t at which the vertical position y(t) becomes zero:

rearranging,
because of the tensity in the earth surface
The volume of the can remains constant, and as the pressure increases with temperature, the can can't contain the pressure any longer.
No they don't. Incident rays parallel to the axis of a concave mirror
reflect from the mirror's surface and converge at its focal point.
Answer:
B)a tool to drop temperatures, mercury, an electric current, and a tool to measure resistance