Suppose Earth collapsed down to one-tenth of its present radius, while retaining all of its present mass. Compared to your present mass, your mass would be
A) reduced by a factor of 100.
B) unchanged.
C) reduced by a factor of 10.
D) increased by a factor of 10.
E) increased by a factor of 100.
B
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YSOs are in hydrostatic equilibrium
a. True b. False Indicate whether the statement is true or false
The daytime surface temperature of Mercury is higher than Earth's Moon's surface temperature because
a. clouds shield the Earth's Moon during the day. b. Mercury is farther from the Sun than the Earth's Moon. c. Mercury is closer to the Sun than the Earth's Moon. d. the atmosphere of the Earth's Moon has a strong greenhouse effect.
A 905-g meteor impacts the earth at a speed of 1629 m/s. If all of its energy is entirely converted to heat in the meteor,
what will be the resulting temperature rise of the meteor, assuming it does not melt? The specific heat for the meteor material is 472 J/kg?K, which is about the same as that of iron. A) 2810°C B) 2,540,000°C C) 3.10°C D) 11,700°C
A 5 500-N weight is held suspended in equilibrium by two cables. Cable 1 applies a horizontal force to the right of the object and has a tension, T1 . Cable 2 applies a force upward and to the left at an angle of 40.0° to the negative x-axis and has a tension, T2 . What is the tension, T1?
a. 4.6E+3 N b. 6.6E+3 N c. 4.2E+3 N d. 8.6E+3 N e. 1.1E+4 N