A 2.0-kg projectile moves from its initial position to a point that is displaced 20 m horizontally and 15 m above its initial position. How much work is done by the gravitational force on the projectile?

a. +0.29 kJ
b. -0.29 kJ
c. +30 J
d. -30 J
e. -50 J


B

Physics & Space Science

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A barge is 10.0 m wide and 60.0 m long and has vertical sides. The bottom of the hull is 1.20 m below the water surface. What is the weight of the barge and its cargo, if it is floating in fresh water?

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Extra mass dumped on a white dwarf creates a nova, but if dumped on a neutron star, it creates

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At what distance could one theoretically distinguish two automobile headlights separated by 1.5 meters? Assume a pupil diameter of 0.50 cm and yellow headlights seen at the wavelength 5.0 × 10^?7 m. Assume eye fluid has an average n = 1.33

a. 6.0 km b. 12 km c. 9.0 km d. 3.0 km e. 16 km

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