An astronaut on a strange new planet finds that she can jump up to a maximum height of 27. meters when her initial upward speed is 6.0 m/s. What is the magnitude of the acceleration of gravity on the planet?
What will be an ideal response?
0.67 m/s2
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A cylindrical tank is assembled by welding steel sections circumferentially. Tank diameter is 1.5 m, thick- ness is 20 mm, and internal pressure is 2.0 MPa. The maximum shear stress in the heads is approximately:
(A) 19 MPa
(B) 23 MPa
(C) 33 MPa
(D) 35 MPa
Einstein's theory of relativity tells us that travelers who make a high-speed trip to a distant star and back will
A) age less than people who stay behind on Earth. B) age more than people who stay behind on Earth. C) have more fun than people who stay behind on Earth. D) never be able to make the trip within their lifetimes.
The velocity of a boat with respect to the water is 4.0 m/s at an angle of 30.0 degrees NORTH of WEST. The velocity of the water with respect to the ground is 8.0 m/s at an angle of 45 degrees SOUTH of EAST. What is the velocity of the boat with respect to the ground?
A. 4.7 m/s at 32 degrees SOUTH of WEST B. 4.3 m/s at 59 degrees SOUTH of EAST C. 8.3 m/s at 22 degrees SOUTH of WEST D. 9.8 m/s at 330 degrees SOUTH of EAST E. 8.3 m/s at 25 degrees SOUTH of WEST
Standing waves can result from _____ waves
a. longitudinal b. transverse c. both longitudinal and transverse d. neither longitudinal nor transverse