A 20 watt light bulb uses 20 joules of energy every second. A person expends 50 watts of energy per stair when climbing up stairs. Calculate how long you could light the light bulb if the energy used to climb 20 stairs were converted to electricity.

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.

Using proper grammar, spelling, and punctuation, write at least one 5 sentence paragraph describing 3 ways we use the elements of the electromagnetic spectrum (ems) in our everyday lives.

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem