An object is at rest on the equator. Estimate its speed relative to the center of the Earth in m/s
1.less than 0.001
2.between 0.001 and 0.01
3.between 0.01 and 0.1
4.between 0.1 and 1
5.between 1 and 10
6.between 10 and 100
7.between 100 and 1,000
8.between 1,000 and 10,000
9.more than 10,000
10.Impossible to determine
7
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A box is placed on a table which rests on the floor. The box pushes on the table; the reaction force to the box's push on the table is the table's push on the floor
A) True B) False
The Local Group of galaxies is dominated by the presence of spiral galaxies
a. True b. False Indicate whether the statement is true or false
When we say that the speed of sound is measured under adiabatic conditions we assume that
a. the time associated with heat conduction is slow relative to the speed of the wave. b. no heat can flow between the system and its surroundings. c. the speed of the wave is directly proportional to the bulk modulus. d. the speed of the wave is proportional to the square root of the bulk modulus. e. air is an ideal gas.
The isotope, tritium, has a half-life of 12.3 years. Assume we have 10 kg of the substance. What will be the disintegration constant (in s-1)?
a. 5.6 × 10^-2 b. 5.6 × 10^8 c. 3.2 × 10^7 d. 1.8 × 10^-9 e. 1.6 × 10^6