How do you make a lightsaber?

What is potential energy? Question 6 options: The energy an object has due to its motion. The stored energy of an object due to its position or cintidion The energy an object might have it it existed The energy of a chemical reaction

During a storm, thunder is heared 7s after the lightining is seen. If the temperature of the air at the time of the storm is 28°C. how far away is the storm?

A compact car with a mass of 1,000 kg, traveling at 15 m/s, runs into and sticks to - an at-rest SUV of 2,200 kg. What is the final speed of the two cars? A. 4.7 m/s B. 67 m/s C. 2.2 m/s D. 147 m/s

a ball at rest falls from a platform above the ground. the ball falls freely and hits the ground 1.1 s later. what is the platform

What is a light-year equal to? A. the distance light travels in one year B. the time it takes light to travel 10 trillion kilometers C. the mean distance between the Sun and the center of our galaxy D.

A car accelerates uniformly from 0 to 15m/s in 5 s. Calculate acceleration.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is:

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.

What two factors determine how fast weathering occurs