An optical telescope is able to resolve blue objects better than red objects.
Answer the following statement true (T) or false (F)
True
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Newton's law of gravitational force states that ____
a. an object with no force on acting on it continues at rest or moves in uniform motion in a straight line with constant velocity b. an object with no force on it moves in a straight line with constant acceleration c. for every action, there is an equal and opposite reaction d. the force between two objects is directly proportional to the product of their masses and inversely proportional to the distance between them squared e. an object with a force on it is accelerated in the direction of the force an amount inversely proportional to its mass and directly proportional to the size of the force
The figure above shows the geological time scale of Earth. The K-T event that marks the extinction of the dinosaurs occurred approximately ________ years ago.
A) 65 million B) 10 million C) 650 million D) 100 million
How long have mammals been present on Earth?
A) about 1 million years B) about 65 million years C) about 225 million years D) about 510 million years
Suppose an object is moving in a straight line at 50 miles/hr. According to Newton's first law of motion, the object will
A) continue to move in the same way forever, no matter what happens. B) continue to move in the same way until it is acted upon by a force. C) eventually slow down and come to a stop. D) continue to move in a straight line forever if it is in space, but slow and stop otherwise. E) continually slow down but never quite come to a complete stop.