Q4. The arrangement of electrons in atoms can change. (a)
Describe what might happen to make an electron move from a lower energy level to a higher
energy level in a neon atom.

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.

What is the coefficient of kinetic friction μk between the block and the tabletop?

A1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. what is the magnitude of the friction force required to keep the car from sliding?