An object is thrown upwards with a speed of 16 m/s. How long does it take it to reach a height of 7.0 m on the way up?
A) 0.52 s
B) 1.2 s
C) 2.4 s
D) 3.1 s
E) 4.2 s
A
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Project a cannonball from atop Newton's hypothetical mountain at 8 km/s and it orbits Earth. Project it at 9 km/s and the shape of the orbit is
A) a somewhat larger circle. B) a wide parabola. C) an ellipse.
When myopia is corrected surgically, the shape of the ________ is changed
Fill in the blank(s) with correct word
Which of the following worlds has the most substantial atmosphere?
A) the Moon B) Earth C) Venus D) Mercury E) Mars
Two pipes are smoothly connected together without leaks. One has a diameter of 3 cm and the other has a diameter of 5 cm. Water flows through the pipes. In which pipe is the flow speed the greatest?
1.in the pipe that the water flows through first (the "upstream" pipe) 2.in the 3 cm pipe 3.in the 5 cm pipe 4.in neither, the flow rate is the same in both pipes