After the discovery of the electron, scientists knew that atoms must also have positively changed particles because?

A. Atoms have mass

B. Atoms have electrical charge

C. Atoms have neutral charge

How many joules does a shortbread cookie have

A solid nonconducting sphere of radius r has a charge q uniformly distributed throughout its volume. a gaussian surface of radius r with r < r is used to calculate the magnitude of the electric field e at a distance r from the center of the sphere.

In your own words explain efficiency

A flashlight has a resistance of 2.4 what voltage is applied by the batteries if the current in the circuit is 2.5 a?

What is the station's orbital speed? the radius of earth is 6.37*106m, its mass is 5.98*1024kg.

Dark matter has been detected by its

The catcher catches a. 5 kg baseball traveling at 40 m/s and the glove is pushed back 10 cm. What average force did the catcher put on the ball?

Describe the climate and name the climate zone at alaska; portland, oregon; and key west, florida.

If a river is 20 feet wide in nature and needs to be scaled to one-tenth its real size, how wide should it be in a model?

A sample has a density of 30 g/ml. there is 60 ml of this substance. how much does it weigh?