Granulation is caused by which energy transport?
a. convection b. radiation
c. conduction d. none of the others
a
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A car moving at a steady 10 m/s on a level highway encounters a bump that has a circular cross-section with a radius of 30 m
The car maintains its speed over the bump. What is the force exerted by the seat of the car on a 60.0-kg passenger when the car is at the top of the bump? A) 200 N B) 390 N C) 790 N D) 490 N E) 590 N
If a body were in orbit very near the surface of the Earth, its centripetal acceleration would be
a. equal to g. b. smaller than g. c. larger than g. d. dependent on its mass. e. none of the above.
With which of the following observations could Tycho have demonstrated that a comet must be a celestial phenomenon? (Note: you may want to review Ch. 2)
A) from the comet causing a full solar eclipse across much of Europe B) measuring changes in its brightness over time C) parallax measurements from observing it from two locations on Earth
At what speed will a car round a 125 m radius curve, banked at a 45° angle, if no friction is required between the road and tires to prevent the car from slipping? (g = 9.8 m/s2)
a. 27 m/s c. 23 m/s b. 17 m/s d. 35 m/s