Most extrasolar Neptunes and Jupiters found to date have:
A) orbits very close to their parent stars, making them hot Neptunes and hot Jupiters.
B) orbits that are more eccentric than those of planets in our solar system, with eccentricities greater than 0.1.
C) orbits that are less eccentric than those of planets in our solar system, with eccentricities less than 0.01.
D) much larger orbits than the jovian planets in our solar system.
B
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A particle whose mass is 2 kg moves in the xy plane with a constant speed of 3 m/s in the x direction along the line y = 5. What is its angular momentum (in kg?m2/s) relative to the origin?
A.
B.
C.
D.
E.
A 2.0-kg block slides down a frictionless incline from point A to point B. A force (magnitude P = 3.0 N) acts on the block between A and B, as shown. Points A and B are 2.0 m apart. If the kinetic energy of the block at A is 10 J, what is the kinetic energy of the block at B?
a.
27 J
b.
20 J
c.
24 J
d.
17 J
e.
37 J
An automobile and a golf cart traveling at the same speed collide head-on. The impact force is
A) greater on the automobile. B) greater on the golf cart. C) the same for both.
Significant Figures: Add 1299 g and 45.1 kg and express your answer in milligrams (mg) to the correct number of significant figures.
A. 4.64 × 107 mg B. 4.64 × 104 mg C. 4.64 × 105 mg D. 4.64 × 106 mg