One liter of pure water at its maximum density has a mass of 1 ______________

Fill in the blank(s) with correct word


kg

Physics & Space Science

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Newton concluded that a force from the Earth had to act on the moon because

a. a force is needed to keep the moon in motion in its orbit. b. a force is needed to pull the moon outward. c. a force is needed to accelerate the moon toward Earth away from straight-line motion. d. the moon moved at a constant velocity in a straight line. e. all of the above

Physics & Space Science

Proportional Reasoning: In the absence of air resistance, a ball is thrown vertically upward with initial speed v. An identical ball is thrown upward with initial speed 2v. If the first ball reaches a maximum height h, what maximum height will the second ball reach?

A. 8h
B. 4h
C. 2h
D. h
E. h

Physics & Space Science

Which orbital shapes are possible under the force of gravity?

A) ellipses only B) ellipses and spirals C) ellipses, parabolas, and hyperbolas D) ellipses, spirals, and parabolas E) spirals, circles, and squares

Physics & Space Science

Photon Momentum: What is the momentum of a photon of light that has a wavelength of 480 nm? (h = 6.626 × 10-34 J ? s)

A. 1.1 × 1027 kg?m/s B. 2.2 × 1027 kg?m/s C. 1.8 × 1027 kg?m/s D. 1.4 × 1027 kg?m/s E. 2.0 × 1027 kg?m/s

Physics & Space Science