What equals the number of protons in an atom

Starting with 100 grams of uranium-238, after one half life has gone by, how many grams of uranium-238 will remain? Group of answer choices 50 g 100 g 12.5 g 25 g

What is true about the refractive index of a medium? A. It increases with an increase in angle of incidence. B. It decreases with a decrease in angle of refraction. C. It decreases with an increase in angle of incidence. D.

What would happen if you dropped two balls of different masses but equal shape and volume from a building?

A northfield raider defensive back runs 20 m in 2.5 s what's the average speed

When heat is transferred to a substance explain why the temperature goes up?

What causes ice to melt and water to boil

A block of mass 3.5 kg slides down a frictionless inclined plane of length 6.4 m that makes an angle of 30 degrees with the horizontal. if the block is released from rest at the top of the incline, what is its speed at the bottom

What is the wavelength of an earthquake wave if it has a speed of 5 km/s and a frequency of 10 Hz?

The gamma ray released by each decay carries 140kev of energy. find the total energy e released by decays in the 2 hours.

Think of the last five things you read. Now think of a type of reading you havent done recenty have never read. What kind of pattern do you see in your reading? What is your favorite type of reading and your least favorite type of reading?