Why do comets have tails?

3. A force of 70 N is applied to turn a wrench that is 0.6 long. What is the moment? * 52 Nm 42 Nm 42 42 N

When one side of the Earth is at high tide, then the opposite side of the Earth is also at high tide. True False

What is the total number of quarks in a tritium nucleus

Huifen weighs herself on her bathroom scales. She says "My weight is 54 kg!"In Science, what Huifen said would be considered wrong. Explain why.

A liquid is cooled if a. evaporation exceeds condensation. b. condensation exceeds evaporation. c. evaporation and condensation proceed at equal rates. d. condensation occurs at twice the rate of evaporation

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