If the atomic number of an element is 8 and its mass number is 20, how many neutrons are in the atom's nucleus?

1) Which conditions will result in the smallest change in momentum?. A) a large force over a long time period. B) a large force over a short time period. c) a small force over a long time period. D) a small force over a short time period.

How can an element be identified using its emission spectrum? A. By measuring the frequencies of the spectral lines, and calculating the energies that these correspond to B.

Which two terms best describes the gravitational force

In a battery electrons flow from the what terminal to the what terminal

Watery clay soil slides down a mountain is an example of what

An object with a mass of 10.9 kg experiences a force of 18.53 N. What is the acceleration of the object? A. 2.2 m/s2 B. 1.7 m/s2 C. 16.83 m/s2 D. 1.3 m/s2

A proton, starting from rest, accelerates through a potential difference of 1.0 kV and then moves into a magnetic field of 0.040 T at a right angle to the field. What is the radius of the proton's resulting orbit

Which of the following terms are needed to completely describe speed? Check all that apply. A. Units B. Direction C. Number D. Mass

Drivers are able to see objects ahead of them because light travels through windshields.

How are trade winds affected by the coriolis effect