Most stars are usually formed singularly or as binaries, not in clusters
Indicate whether the statement is true or false
FALSE
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The resultant of a 40-N force at right angles to a 30-N force is
A) 30 N. B) 40 N. C) 50 N. D) greater than 50 N.
You lift a 10. lb physics book up in the air a distance of 1 ft, at a constant velocity of 0.5 ft/s. The work done by gravity is
A) +5 ft?lb. B) -10 ft?lb. C) -5 ft?lb. D) zero. E) +10 ft?lb.
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The kinetic energy of the crate is 1/2 mv2
Indicate whether the statement is true or false
A sound source of frequency 1000 Hz moves at 40.0 m/s toward a listener who is at rest. What is the apparent frequency heard by the listener? (speed of sound = 340 m/s)
a. 853 Hz c. 1130 Hz b. 872 Hz d. 1170 Hz