The universe contains

A. Few black holes

B. Billions of galaxies

C. Millions of stars

D. Few wavelengths

If 500 thousand btus of energy are available to raise the temperature of a water boiler from 20°f to 100°f, how many gallons of water can be added to the boiler?

Which bonds are found inside a water molecule

A work crew is using a pulley to lift a small piano up the outside of a building to a second-floor balcony. The piano has mass 180 kg. At a height of 3.0 m, what is the piano's gravitational potential energy with respect to the ground? A. 9.8 J B.

Energy transformation of a jet plane rapidly accelerates down a runway

A hot-air balloon is ascending at the rate of 10 m/s and is 74 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground?

A large balloon is initially filled to a volume of 1.96 l at 318.44 k and a pressure of 2.89 atm. what volume of gas will the balloon contain at 1.77 atm and 336.33 k?

How to calculate kinetic energy? (physics/physical science)

What's the difference between the offspring of an asexual organism and a sexual organism

The contamination that results from the spread of bacteria from meat to vegetables is called

A rock has a mass of 5 kg on the moon. What is the mass of the rock on the earth