The main purpose of DST is to save ______________
Fill in the blank(s) with correct word
energy
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A total lunar eclipse is visible only from the path of totality
Indicate whether the statement is true or false
The force of gravity from one object extends to infinity never going to zero.When we say that gravitation is universal we mean that
a. the Earth exerts gravitational force on objects on its surface b. the Earth exerts a gravitational force on its moon and vice versa c. the Earth, moon and sun exert gravitational forces on each other d. all material objects in the universe exert gravitational forces on one another.
Simple Harmonic Motion: If the frequency of the motion of a simple harmonic oscillator is doubled, by what factor does the maximum speed of the oscillator change?
A. 2 B. 4 C. It does not change. D. 1/2 E. 1/4
Eta Carinae is an example of a:
A) black hole. B) supermassive star. C) red dwarf. D) nebula. E) stellar nursery.