A spacecraft can gain energy by passing near a planet

a. True
b. False
Indicate whether the statement is true or false


True

Physics & Space Science

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The factor most directly responsible for making a black hole invisible is its

A) size. B) mass. C) color. D) surface escape velocity. E) none of the above

Physics & Space Science

Evidence gathered from observations of exoplanets indicates approximately what percentage of stars have planets?

A) 0 B) 1 C) 10 D) 100 E) It is not yet possible to make an estimate.

Physics & Space Science

A catcher stops a 0.15-kg ball traveling at 40 m/s in a distance of 20 cm. What is the magnitude of the average force that the ball exerts against his glove?

What will be an ideal response?

Physics & Space Science

An object that weighs 75.0 N is pulled on a horizontal surface by a horizontal pull of 50.0 N to the right. The friction force on this object is 30.0 N to the left. The acceleration of the object is closest to

A) 0.267 m/s2 B) 1.07 m/s2 C) 2.61 m/s2 D) 10.5 m/s2

Physics & Space Science