It requires 0.30 kJ of work to fully drive a stake into the ground. If the average resistive force on the stake by the ground is how long is the stake?
A) 0.36 m
B) 0.23 m
C) 0.31 m
D) 0.41 m
A
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If a pizza radiates more energy than it absorbs, its temperature
A) decreases. B) is unaffected. C) increases. D) none of the above
Knowledge of a star's temperature and ________ enables us to calculate its radius, surface area, and volume from the appropriate radiation law
Fill in the blank(s) with correct word
Pulling out of a dive, the pilot of an airplane guides his plane into a vertical circle with a radius of 600 m. At the bottom of the dive, the speed of the airplane is 150 m/s
What is the apparent weight (the force that the pilot exerts on the seat) of the 70-kg pilot at that point? A) 3300 N B) 690 N C) 2600 N D) 490 N E) 1400 N
One of the harmonics of a column of air in a tube that is open at one end and closed at the other has a frequency of 448 Hz, and the next higher harmonic has a frequency of 576 Hz. How long is the tube? The speed of sound in air is 343 m/s
A) 1.34 m B) 0.670 m C) 0.335 m D) 1.00 m E) 2.68 m