Approximately how long is a light-year?
a. 9.5 billion km
b. 95 billion km
c. 9.5 trillion km
d. 95 trillion km

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?