Which subatomic particle has the least mass? a) electron b) nucleus c) neutron d) proton

Which property of fossils allow scientists to determine the relative rock ages..

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.

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine