How many btus of heat energy are needed to raise the temperature of 99.6 lbs of water from 50 °f to 130 °f?

Lightning sometimes happens between clouds. suggest a possible way that a discharge can occur between clouds

An atom emits a light wave with a wavelength of 449 nm. what type or color of light does this represent?

Which of the following is NOT an example of accelerated motion? A. an airplane taking off down a straight runway B. a boulder falling off a cliff in a straight path C. a ball being thrown straight up D.

Why does the temperature of melting ice not change even though is being transferred as heat to the ice? A. The potential energy of the molecules does not change. B. Energy is used to break bonds between molecules in ice. C.

A 2.00 m long string is vibrated 5.00 times every second to create a standing wave with 2 antinodes. 1.) what is the speed of the waves creating the standing wave? 2.) what is the fundamental frequency of the string? 3.

justin pushes basket of toys with 50N of force for 3 meters in 100 seconds. how much work did he do on the basket

In general, what can be said about metals.

If the moon did not have an atmosphere what would happen to it

Density is calculated by: dividing volume by mass dividing mass by volume multiplying mass and volume multiplying mass and gravity

The Burj Khalifa in Dubai is the tallest building in the world at about 828 m. A daredevil climbs to the top of the building and sees the the Boulevard Plaza 2 (141 m tall) about 300 m away.