If a sample that is 4860 years old has 50 radium atoms remaining, how many atoms were in the original sample?

He amount of current flowing in a circuit can be measured by A. an ammeter. B. a voltmeter. C. a neon test lamp. D. an ohmmeter. User: 3. Which one of the following letters is used in formulas as the symbol for voltage? A. P B. W C. I D. E

Which of the following is a fundamental quantity? A) speed B) density C) length D) impulse E) angle

How far from the center of the earth is the center of mass of the earth + moon system?

List a few reasons you do not support nuclear energy

Describe the issues with hypnotic regression.

Which of the following is considered a contact forces?1) the force between two magnets. 2) the gravitational pull of a planet. 3) friction between an object and air. 4) the force between two charged particles.

All matter can be described by using what properties

When a quantity of monatomic ideal gas expands at a constant pressure of 4.00*104pa, the volume of the gas increases from 2.00*10-3m3 to 8.00*10-3m3?

When the notebook is sitting on the table, what force prevents it from falling into the space below the table? If you don't know the name of this force, just describe it. What force keeps the notebook from floating in the air?

1. A moving object with a mass of 8.8 kg has linear momentum of magnitude 13 kg mis. What is the kinetic energy of the object? a) 19) b) 4.8 c) 9.63 d) 0.743 e) 38)