The planet closest in size to Earth is

A) Mercury.
B) Venus.
C) the Moon.
D) Mars.
E) Pluto.


B

Physics & Space Science

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You are holding on to one end of a long string that is fastened to a rigid steel light pole. After producing a wave pulse that was 5 mm high and 4 cm wide, you want to produce a pulse that is 6 cm wide but still 5 mm high. You must move your hand up and down once,

a. the same distance up as before, but take a shorter time. b. the same distance up as before, but take a longer time. c. a smaller distance up, but take a shorter time. d. a greater distance up, but take a longer time. e. a greater distance up, but take the same time.

Physics & Space Science

Which of the following is the most precise method for measuring the mass of a galaxy?

A) The parallax method B) The rotation curve method C) The visual field test D) Colorimetry

Physics & Space Science

Series Resonance: In the figure, which of the phasor diagrams represents a series RLC circuit driven at resonance?

A. 1 B. 2 C. 3 D. 4 E. 5

Physics & Space Science

By what length will a slab of concrete that is originally 18 m long contract when the temperature drops from 24°C to -16°C? The coefficient of linear thermal expansion for this concrete is 1.0 × 10-5 K-1

A) 0.50 cm B) 0.72 cm C) 1.2 cm D) 1.5 cm

Physics & Space Science