Current statistical evidence suggests that Earth-sized planets orbiting in the habitable zone are
A) extremely rare.
B) likely to exist around at least about 20% of all stars.
C) found around virtually all stars.
B) likely to exist around at least about 20% of all stars.
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Fluid Flow: A hole of radius 1.0 mm forms in the bottom of a very large water storage tank that holds water to a depth of 15 m. At what volume rate will water flow out of the hole?
A. 5.4 × 10-4 m3/s B. 5.4 × 10-5 m3/s C. 5.4 × 10-6 m3/s D. 5.4 × 10-7 m3/s
Kinetic energy of a rolling object
A. Is zero B. Is the same as a non-rotating object with the same speed C. Is greater than that of a non-rotating object with the same speed D. Is less than that of a non-rotating object with the same speed
If the average translational kinetic energy of the molecules of one sample of gas has twice the value of that of another sample of gas, how do the internal energies of the two gases compare?
1.The internal energy of the first gas is greater. 2.The internal energy of the second gas is greater. 3.The internal energies of both gases are the same. 4.We cannot determine which gas has the greater internal energy.
Uranus completes one revolution about its own axis every 17.24 hours. What is the radius of the orbit required for a satellite to revolve about Uranus with the same period? Uranus has a mass of 8.69 × 1025 kg and G = 6.67 x 10-11 N•m2/kg2
A) 8.27 × 107 m B) 3.41 × 108 m C) 2.56 × 108 m D) 9.03 × 107 m E) 1.04 × 107 m