Most asteroids are oblong in shape. Approximate an asteroid as being made up of two identical spheres of mass M and radius R that are just touching each other, in a figure eight
In terms of G, M, and R, what is the escape velocity for a spaceship taking off from the top of the figure eight? A) (2GM/R)1/2
B) (4GM/3R)1/2
C) (8GM/3R)1/2
D) (3GM/R)1/2
E) (7GM/5R)1/2
C
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If y = 0.02 sin (30x - 400t) (SI units), the frequency of the wave is
a. 30 Hz b. 15/p Hz c. 200/p Hz d. 400 Hz e. 800p Hz
Would a nitrogen atom in Venus's atmosphere, whose temperature is 740 K, eventually es-cape into outer space? Note that a nitrogen atom has a mass that is 14 times that of a hydro-gen atom. Recall that atoms eventually will escape if their average velocity is greater than 1/6 times the escape velocity of the planet. The escape velocity of Venus is 10 km/s. For comparison, a hydrogen atom has an average velocity of 2.5 km/s at a temperature of 300 K.
a. The average velocity of nitrogen atoms is 0.4 km/s, and nitrogen does not escape. b. The average velocity of nitrogen atoms is 1.0 km/s, and nitrogen does not escape. c. The average velocity of nitrogen atoms is 1.0 km/s, and nitrogen escapes. d. The average velocity of nitrogen atoms is 4.5 km/s, and nitrogen does not escape. e. The average velocity of nitrogen atoms is 4.5 km/s, and nitrogen escapes.
The special theory of relativity predicts that there is an upper limit to the speed of a particle. It therefore follows that there is also an upper limit on the following properties of a particle
A) the kinetic energy B) the total energy C) the linear momentum D) more than one of these E) none of these
Starting from rest, a 2 kg body acquires a speed of 8 m/s in 2 seconds. The net force acting on the body is
a. 2 N b. 4 N c. 8 N d. 16 N e. 6 N