A spherically symmetric planet has four times the Earth's mass and twice its radius. If a jar of peanut butter weighs 12. N on the surface of the Earth, how much would it weigh on the surface of this planet?
A) 18 N
B) 12 N
C) 30 N
D) 6 N
E) 24 N
B
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A constant force of 15 N in the negative y direction acts on a particle as it moves from the origin to the point (3i+3j-1k)m. How much work is done by the given force during this displacement?
What will be an ideal response?
A certain spherical asteroid has a mass of is 4.65 × 1017 kg and a radius of 39,600 m
If a 150-kg object is dropped from rest at an altitude of 12,400 m above the surface of this asteroid, with what speed will it hit the surface? (G = 6.67 × 10-11 N ? m2/kg2 ) A) 19.3 m/s B) 22.7 m/s C) 26.2 m/s D) 18.2 m/s E) 13.8 m/s
In order for two waves to interfere completely destructively, they must
a. have the same amplitude. b. be exactly out of phase. c. one wave's peak must align with the other's valley. d. be transverse waves. e. all of the above
The temperature of a quantity of an ideal gas is
a. one measure of its ability to transfer thermal energy to another body. b. proportional to the average molecular kinetic energy of the molecules. c. proportional to the internal energy of the gas. d. correctly described by all the statements above. e. correctly described only by (a) and (b) above.