Which is a way to express concentration of a solution?

parts per billion

moles

molar mass

force per square meter

How do you calculate the average speed of an object?

If the earth were not revolving around the sun would the earth fall into the sun? Why?

The news media often report an earthquake's magnitude on the Richter scale. Which of the following items are characteristics of a Richter earthquake magnitude?

If 3920 J are used to raise a 200-kg mass, how high is the mass raised?

Suppose your hair grows at the rate 1/31 in. per day. find the rate at which it grows in nanometers per second. because the distance between atoms in a molecule is on the order of 0.

What does Kepler's second law state? A. Planets travel in ellipses. B. Planets sweep equal areas in equal times. C. A planet's apparent backward movement is termed retrograde motion. D.

Why do charges build up in a cloud

How does the wave model of electrons orbiting the nucleus account for discrete energy values?

An ecosystem is all the populations of organisms that live together and A. the microorganisms that depend on them. B. the organisms that generate energy from sunlight. C. the physical factors with which they interact. D.

Which statement about magnetic poles is accurate? A) Same magnetic poles attract, while different magnetic poles repel. B) Same magnetic poles attract, while different magnetic poles attract.