Fire a cannonball with enormous speed from a hypothetical cannon and it curves due to gravity. Shine a light from a flashlight parallel to the cannon and it
A) follows a straight-line path.
B) curves downward as much as the cannonball.
C) curves slightly upward.
Answer: B
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Gravitational Force: ?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 moons, A and B, in circular orbits around it. The table summarizes the hypothetical data about these moons. What is the magnitude of the maximum gravitational force that Moon A exerts on Moon B? (G = 6.67 × 10-11 N ? m2/kg2)
A. 1.6 × 1013 N B. 4.4 × 1013 N C. 1.0 × 1014 N D. 2.0 × 1014 N E. 4.0 × 1014 N
You want to store 1,000 J of energy in an ideal spring when it is compressed by only 2.5 cm. What should be the spring constant of this spring?
What will be an ideal response?
Uncertainty Principle Using Momentum and Position: A measurement of an electron's speed is 2.0 × 106 m/s and has an uncertainty of 10%. What is the minimum uncertainty in the position of the electron? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A. 0.29 nm B. 0.58 nm C. 0.87 nm D. 1.5 nm E. 4.9 nm
In noting that the Earth is "differentiated," we mean that
A) the density increases as you descend downward toward the core. B) the Earth's magnetic field varies at different locations on the globe. C) the Earth is very different than any other planet we study. D) the radioactive heating in the core is increasing with time. E) the density of oceanic basalt is less than that of granite on the mountain tops.