What are the units for measuring current and voltage

Why do trains use steel wheels rather than rubber tires? A) Steel wheels provide more grip, making it easier to stop a train. B) Rubber tires don't provide enough friction to allow the train to move.

You hear a sound in the distance. Suddenly the sound gets deeper, decreasing in pitch. Which can you assume about the sound waves reaching your ears? A. The wavelengths of the new sound waves are longer. B.

Use the term cell differentiation in a sentence

The SI unit for energy is the Joule (J). Sam wants to convert 338.25 J into kJWhich operation should he choose? a. He should multiply 338.25 by 10. b He should multiply 338.25 by 100. c He should divide 338.25 by 100. c He should divide 338.

During a storm, the power went out at Bailey's house. She had no electricity. What could she use as an alternate form of electrical energy? A) candles B) a fire in the fireplace C) a battery-operated lamp Eliminate D) a light in the refrigerator

What is the mass in kg of a leopard in a tree if the tree branch is 36 m up and the leopard's gravitational potential energy is 29988 J?

Venus's average distance from the sun is 0.72 AU and Saturn's is 9.54 AU. Calculate the orbital velocity of Venus and Saturn around the sun. (The mass of the sun is 1.99 X 10^30 KG. an AU is 1.50 X 10^11 M.

Caleb's parent drove him to a swim meet 208 km away. It took them 2 hours, which included a 15-minute break to refuel. What was their average driving speed?

Why is thermal energy from the Sun transferred to Earth through electromagnetic waves instead of any other type of thermal energy transfer? Electromagnetic waves can carry energy through matter. Electromagnetic waves can travel through empty space.

Why do different elements emit different colors of light