A car is driven 1 200 m north at 20.0 m/s and then driven 1 600 m east at 25.0 m/s. What are the magnitude and direction of the displacement for this trip?
a. 1 400 m, northeast
b. 2 000 m, 36.9° north of east
c. 2 000 m, 53.1° north of east
d. 2 800 m, 36.9° east of north
e. 2 800 m, 53.1° east of north
B
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Which of the following is not a carbohydrate?
a. Maltose b. Glycine c. Fructose d. Glucose
A hypothetical planet has a mass of one-half that of the earth and a radius of twice that of the earth. What is the free-fall acceleration on the planet in terms of g, the free-fall acceleration at the surface of the earth?
A) g B) g/2 C) g/4 D) g/8 E) g/16
According to dark matter theory, most of the mass of a spiral galaxy is found
A) within the central supermassive black hole. B) within the luminescent spiral arms. C) outside of the luminescent spiral arms. D) in the form of dark energy.
A rigid cylinder (15 cm radius, 15 cm height) contains nitrogen gas 
at standard temperature and pressure. What heat input is required to increase the average translational kinetic energy of the nitrogen molecules by 15%?
A. 150 J B. 130 J C. 260 J D. 86 J E. 51 J F. 77 J