How and why an can be fertilized by one sperm only

How much heat is givne out when 6.0g of water freezes at 0 degrees celcius the heat of fusion of water is 80.0 cal/g?

What creates the phenomenon known as red shift? a. When light emitting bodies move closer to us c. When light is refracted by solar particles b. When light emitting bodies move away from us d. When the amplitude of a wave of light increases

Suppose you see the constellation Orion directly overhead around midnight in February. During which of the following months would it be directly overhead in the daytime (around noon) ? A. March B. December C. August

When is a zero not significant?

Formula for refractive index

Why do different elements emit different colors of light

In an experiment, 108 J of work was done on a closed system. During this phase of the experiment, 79 J of heat energy was added to the system. What was the total change in the internal energy of the system?

J. J. Thomsons experiments provided evidence that an atom

How does our sun differ from most other main sequence stars?

A large body of air hats has similar properties of a temperature and moisture is a