A 64 kg student travels from the first floor to the fourth floor of a school (a height of 15 m). What

total work did she do climbing the stairs?

How long would this trip last if the student

produced 240 W of power?

What are atoms of the same element with varying number of neutrons

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

An owl dives toward the ground with a constant velocity of 4.40 m/s at 53.0° below the horizontal. the sun is directly overhead and casts a shadow of the owl directly below it. what is the speed (in m/s) of its shadow on level ground?