A heavy ball hangs by a string, with a second string attached to its bottom. A slow pull on the bottom string breaks the
A) top string.
B) bottom string.
C) top or bottom string equally.
Answer: A
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The factor most directly responsible for making a black hole invisible is its
A) size. B) mass. C) color. D) surface escape velocity. E) none of the above
The ____ of the Moon and Sun vary slightly because the orbits of the Moon and Earth are slightly elliptical
a. angular distance b. linear diameter c. linear distance d. angular diameter e. angular momentum
Weight and g: ?MassRadiusOrbital radiusOrbital periodMoon A4.0 × 1020 kgunknown2.0 × 108 m4.0 × 106 sMoon B1.5 × 1020 kg2.0 × 105 m3.0 × 108 munknownMithra is an unknown planet that has two airless moons, A and B, in circular orbits around it. The table summarizes the hypothetical data about these moons. If you dropped a laser at the surface of Moon B, at what rate would it accelerate toward the ground? (G = 6.67 × 10-11 N ? m2/kg2)
A. 0.10 m/s2 B. 0.15 m/s2 C. 0.20 m/s2 D. 0.25 m/s2 E. 0.30 m/s2
Projectile Motion: A projectile is thrown upward at 24° with the vertical and returns to the horizontal ground 12.5 s later with no air drag.(a) How fast was it thrown?(b) How far from its original position did it land?(c) How high above its original position did it go?
What will be an ideal response?