In the late 18th century, two astronomers, both with the last name of _______________, were the first to attempt to map the shape of the galaxy

Fill in the blank(s) with correct word


Herschel

Physics & Space Science

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Radio waves, of sufficient frequency, pass through which of the following ion layers?

a. C b. D c. E d. F

Physics & Space Science

A 3.0-kg mass is dropped from the edge of a 50-m tall building with an initial speed of zero. The mass strikes the ground with a downward velocity of 25 m/s. Find the change in mechanical energy of the mass caused by air resistance between the point where it is dropped and the point where it strikes the ground?

a. -0.46 kJ b. -0.53 kJ c. -0.61 kJ d. -0.38 kJ e. -0.81 kJ

Physics & Space Science

General Questions: A person who normally weighs 700 N is riding in a rather swift elevator that is moving at a constant speed of 9.8 m/s. If this person is standing on a bathroom scale inside the elevator, what would the scale read?

A. more than 700 N B. less than 700 N C. 700 N D. It could be more or less than 700 N, depending on whether the elevator is going up or down.

Physics & Space Science

Pluto is smaller than many moons in the solar system

Indicate whether the statement is true or false

Physics & Space Science