The ____________________ is the point on the celestial sphere directly above an observer, regardless of where the observer is located on Earth
Fill in the blank(s) with correct word
Zenith
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A 3.0-kg block is dragged over a rough horizontal surface by a constant force of 16 N acting at an angle of 37° above the horizontal as shown. The speed of the block increases from 4.0 m/s to 6.0 m/s in a displacement of 5.0 m. What work was done by the friction force during this displacement?
A. ?34 J B. ?64 J C. ?30 J D. ?94 J E. +64 J
All of the following are units used to describe radiation dosage in humans except
A) curie. B) rad. C) rem. D) RBE. E) sievert.
A ball is rolled horizontally off a table with an initial speed of 0.18 m/s. A stopwatch measures the ball's trajectory time from table to the floor to be 0.30 s. What is the height of the table? Note: g = 9.8 m/s2 and air resistance is negligible
a. 0.11 m c. 0.33 m b. 0.22 m d. 0.44 m
A board that is 20.0 cm wide, 5.00 cm thick, and 3.00 m long has a density 300 kg/m3. The board is floating partially submerged in water. What fraction of the volume of the board is above the surface of the water?
A) 0.300 B) It depends on which edge of the board is vertical. C) 0.700 D) zero E) 0.200