An atom of calcium-48 and an atom of calcium-47 differ in A) atomic number. B) nuclear charge. C) number of neutrons. D) number of electron

Since there are no aurora observed on Venus we can conclude that Venus a. lacks atmospheric oxygen b. is too hot for magnetic forces. c. lacks a strong magnetic field. d. lacks strong winds.

How long does it take to. travel 500 miles in. a car at 75mph?

A car traveling at 65mph has kinetic energy because of its position on the road

A cube of ice, 12 cm on each side, is melted into a measuring cup. What is the volume of the liquid water? I tried 12x12x12 but the answer is wrong

Suzanne bikes 3 km to school every day. it takes her 20 minutes because she always has to stop at a traffic light. what is her average speed? a. 0.15 km/s b. 3 m/s c. 6.7 km/minute d. 9 km/h

F an electron fell to a lower orbit or energy level, energy would be A. created. B. emitted. C. absorbed. D. transferred.

Which is the correct order from the closest to the sun to the farthest away from the sun? A. terrestrial planets, asteroid belt, gas planets, Kuiper belt B. gas planets, asteroid belt, terrestrial planets, Kuiper belt C.

Ethylene (C2H4) reacts with oxygen gas to produce carbon dioxide and water. 45.0 grams of ethylene reacts, how many grams of carbon dioxide gas will be produced?

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