As it orbits the Earth, the Moon appears to move its own diameter (0.5 degrees) eastward every hour against the background stars
Indicate whether the statement is true or false
TRUE
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A block is dragged without acceleration in a straight-line path across a level surface by a force of 6 N. What is the force of friction between the block and the surface?
A) less than 6 N B) 6 N C) more than 6 N D) need more information
Exactly 500 grams of ice are melted at a temperature of 32°F. (LF,ice = 333 J/g.) The change in entropy (in J/K) is
A. 321. B. 146. C. 512. D. 610. E. 5230.
When you stand on tiptoes on a bathroom scale, there is an increase in
A) weight reading. B) pressure on the scale, not registered as weight. C) both weight and pressure on the scale. D) none of the above
Energy Conservation With Conservative Forces: A small but dense 2.0-kg stone is attached to one end of a very light rod that is 1.2 m long. The other end of the rod is attached to a frictionless pivot. The rod is raised until it is vertical, with the stone above the pivot. The rod is released and the stone moves in a vertical circle with no air resistance. What is the tension in the rod as the stone moves through the bottom of the circle?
A. 20 N B. 40 N C. 60 N D. 80 N E. 100 N