The atomic number of krypton (kr) is 36, and its mass number is 84. how many neutrons does it have? 18 36 48 72

Compare the advantages and disadvantages of buying compact fluorescent bulbs rather than filament bulbs (6 marks)

What is the atomic number of a sodium atom that has 11 protons and 12 nuetrons?

A person whose mass is m = 70.0 kg m=70.0 kg steps on a mechanical bathroom scale placed on an inclined plane that makes the angle α = 22.3 ∘ α=22.3∘ with the horizontal. What is the reading on the scale?

Which chamber of the heart receives blood with sugar and high oxygen levels from the lungs? A. left atrium B. right atrium C. left ventricle D. right ventricle

Increasing the speed of an object__its potential energy. A. does not affect B. increases C. decreases D. changes

What is Newton's second law of motion?

a father has brown hair (B), but the offspring have red hair (a recessive trait), like their mother (b). How is this possible?

You move a 4 N object 10 meters. Find work. Then find power if it is done in 5 seconds.

An explanation of the steady state theory

If a car traveling at 60 km/h will skid 20m when its brakes lock, how far will it skid if it's traveling at 120 km/h when it's brakes lock?