The closest star to the Sun is named _______________
a. Proxima Centauri
b. Sol
c. Jupiter
d. Polaris
a
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Uranus' large axial tilt is thought to be the result of:
A) the same orbital irregularities that led to the discovery of Neptune. B) a single collision or impact event early in the solar system's history. C) the captures of one or more of Uranus' moons. D) giant planet migration. E) multiple catastrophic events, such as glancing collisions.
What primary wavelength and corresponding photon energy is emitted by a body at:
(a) 400.°C? (b) 800.°C? (c) 1200.°C?
A 50-kg child riding a Ferris wheel (radius = 10 m) travels in a vertical circle. The wheel completes one revolution every 10 s. What is the magnitude of the force on the child by the seat at the highest point on the circular path?
a. 0.29 kN b. 0.49 kN c. 0.69 kN d. 0.20 kN e. 0.40 kN
Uncertainty Principle Using Momentum and Position: A 10-g bouncy ball is confined in a 8.3-cm-long box. What is its minimum energy? (h = 6.626 × 10-34 J ? s)
A. 8.1 × 10-65 J B. 3.2 × 10-46 J C. 1.3 × 10-20 J D. 9.4 × 10-75 J