A herd of sheep eats 10 bales of hay every 4 days. If a bale of hay costs $2.85, how much will it cost to feed the sheep hay for one year?
a. $912.50
b. $2,600.63
c. $28.50
d. $3,650.00
b
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Which source generates the most energy over its lifetime?
A) A supernova. B) A gamma-ray burst. C) A quasar. D) The Sun. E) A camp fire.
Which of the following statements best describes the exclusion principle?
A) If a particle has a precisely defined position, it is excluded from having a precisely defined momentum. B) The laws of quantum mechanics are excluded from applying to large objects made of many atoms. C) Two fermions cannot occupy the same quantum state at the same time. D) Two photons cannot be in the same place at the same time. E) The laws of quantum mechanics are excluded from our common sense.
An astronaut who weighs 800 N on the surface of the Earth lifts off from planet Zuton in a space ship. The free-fall acceleration on Zuton is 3.0 m/s2 (down). At the moment of liftoff the acceleration of the space ship is 0.50 m/s2 (up). What is the magnitude of the force of the space ship on the astronaut?
A. 41 N B. 0.29 kN C. 0.24 kN D. 0.20 kN E. 0.37 kN
A diatomic molecule has 2.6 × 10-5 eV of rotational energy in the L = 2 quantum state. What is the rotational energy in the L = 1 quantum state?
A) 3.4 × 10-6 eV B) 4.1 × 10-6 eV C) 5.3 × 10-6 eV D) 7.8 × 10-6 eV E) 8.7 × 10-6 eV