What surprised newton when he started studying at the university?

Falling of apple downward towards the surface of earth.

Explanation:

When Newton was studying at the university below the apple tree. Suddenly an apple fell on his head. He was surprised to see the apple falling on the surface of the earth. He observed few more process and all object came back to the surface of earth.

Through these observations he discovered the phenomenon of gravitational force.

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

a skateboard rolling across the street - apex