The Schwartzschild radius for a 12 solar mass star is
A) 4 km.
B) 15 km.
C) 36 km.
D) 100 km.
E) 3000 km.
C
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A 4.00 kg object is moving at 5.00 m/s NORTH. It strikes a 6.00 kg object that is moving WEST at 2.00 m/s. The objects have a completely inelastic (stick together) collision. The velocity of the 4.00 kg object after the collision is
A. 2.54 m/s at an angle of 35.0 degrees NORTH of WEST. B. 1.93 m/s at an angle of 59.0 degrees NORTH of WEST. C. 1.93 m/s at an angle of 45.0 degrees NORTH of WEST. D. 2.33 m/s at an angle of 59.0 degrees NORTH of WEST. E. 2.33 m/s at an angle of 45.0 degrees NORTH of WEST.
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What will be an ideal response?
A rubber ball and a lump of clay have equal mass. They are thrown with equal speed against a wall. The ball bounces back with nearly the same speed with which it hit. The clay sticks to the wall
Which one of these objects experiences the greater momentum change? A) the ball B) the clay C) Both of them experience the same non-zero momentum change. D) Both of them experience zero momentum change.
Earth's atmosphere gets most of its heat from the
A) Sun. B) Earth's core. C) both of these D) neither of these