A lunar eclipse may occur

a. when the Moon is first quarter phase.
b. when the Moon is 3rd quarter phase.
c. when the Moon is full.
d. when the Moon is new.


c

Physics & Space Science

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The rate of flow of electric charge is measured in units called ______________

Fill in the blank(s) with correct word

Physics & Space Science

As you make a right-hand turn in your car, you are pushed against the door to your left.pushed against the door to your left. This is because

A. the centrifugal force pushed you to the left. B. no force pushed you to the right.

Physics & Space Science

A rock sample contains 1/8 micrograms of the parent radioactive isotope Al-26 and 7/8 micrograms of its daughter isotope Mg-40. If the half-life of this decay is approximately 700,000 years, how old is this rock?

A) 2.1 million years B) 2.8 million years C) 1.4 million years D) 700,000 years

Physics & Space Science

Which two processes can generate energy to help a star maintain its internal thermal pressure?

A) nuclear fission and supernova B) nuclear fusion and gravitational contraction C) nuclear fusion and supernova D) nuclear fusion and nuclear fission

Physics & Space Science