Which of the following contains both protons and neutrons?

a. outer shell

b. nucleus

c. covalent bond

d. ionic bond

Which of the following statements is not true regarding atmospheric pressure? A. When atmospheric pressure is higher than the absolute pressure of a gas in a container, a partial vacuum exists in the container B.

The lowest note on a grand piano has a frequency of 28.1 Hz. It is a fixed string oscillating in its fundamental (longest wavelength) mode. The string is 2.00 m long and has a mass of 340 g.

The density of a fish tank is 0.2fish over feet cubed. There are 8 fish in the tank. What is the volume of the tank?

If the humidity is 95% does that mean 95% of the air is water vapor?

What is the kinetic energy in Joules of a 1,500kg car traveling at 75mph? What is the kinetic energy in Joules of a 1,500kg car traveling at 75mph?

A child pushes horizontally on a box of mass m which moves with constant speed v across a horizontal floor. The coefficient of friction between the box and the floor is μ. At what rate does the child do work on the box?

What two qauntities must be known to calculate the density of a sample of matter

An element's atomic number is 38. How many protons would an atom of this element have?

What's are some forms of chemical energy

True or false a liquid does not have a definite shape, but it does have a definite volume.