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ID: 2107498 • Letter: S
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13.5 m
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0.46 kN
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A 0.75 kg object is at rest. A 2.50 N force to the right acts on the object during a time interval of 1.55 s. What is the velocity of the object at the end of this interval?
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Air is cooled from 23 C to 101 K. What is the temperature difference in K?
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_____ is the energy the thermal energy that flows from a material with a higher temperature to one with a lower temperature.
Work
Potential energy
Kinetic energy
Heat
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The transfer of energy through matter by direct contact of particles is called _____.
convection
radiation
confluence
conduction
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Which of the following conducts heat most effectively?
solid
liquid
gas
plasma
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The temperature at which a helium atom (mass=6.63 x 10^-27 kg) in a gas at thermal equilibrium has rms speed of 3000 m/s is
2880 C
1440 K
2880 K
1440 C
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A body vibrating with simple harmonic motion experiences its maximum restoring force when it is at its
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A wave has a frequency of 4 Hz and an amplitude of 0.02 m. Its maximum velocity is _____.
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25 000 170 000 50 000 1400 This cannot be determined without knowing how many reels were used.Explanation / Answer
2) 550.357142857e+3 km/s 3) 90 km; 18 km N. 4) 20 cm, 180 degrees 5) 13.5 m 6) 12N
7) 0.83KN 8)
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