Which of the following best explains the origin of primitive meteorites?
A) They are leftover chunks of rock from the earliest period in the formation of the solar system.
B) They are fragments of comets rather than of asteroids.
C) They are fragments of an asteroid that was shattered by a collision.
D) They are fragments of rock chipped off the planet Mercury.
E) They are fragments of rock chipped off the planet Mars.
A) They are leftover chunks of rock from the earliest period in the formation of the solar system.
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The figure shows two 1.0 kg-blocks connected by a rope. A second rope hangs beneath the lower block. Both ropes have a mass of 250 g. The entire assembly is accelerated upward at 2.3 m/s2 by force . What is the tension at the top end of rope 1?
A) 18 N B) 15 N C) 2.9 N D) 3.5 N
The speed of electromagnetic waves through a vacuum is ten times the speed of sound in air
Indicate whether the statement is true or false
A truck is using a hook to tow a car whose mass is one quarter that of the truck. If the force exerted by the truck on the car is 6000 N, then the force exerted by the car on the truck is
A) 12000 N. B) 24000 N. C) 1500 N. D) 6000 N. E) We need to know if the car is accelerating to answer this question.
Neptune circles the Sun at a distance of 4.50 × 1012 m once every 164 years. Saturn circles the Sun at a distance of 1.43 × 1012 m. What is the orbital period of Saturn?
A) 304 years B) 121 years C) 109 years D) 88.6 years E) 29.4 years