POSSIBLE POINTS: 1. A 60 Kg student wearing frictionless skates, pushed by a friend with a force of 30N. How far must the student be pushed, starting from rest with a fina velocity of 2m/s?​

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.

Which accurately compares concave and convex lenses?