According to the ages of the globular clusters, our Galaxy is about ________ times as old as the solar system
Fill in the blank(s) with correct word
two
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A camera with a 20-cm diameter lens is recording images using a filter that allows only light of wavelength 600 nm to pass through
(a) What is the limit on the angular resolution (in microradians) in this case? (b) What is the diameter of the minimum-sized features that could be resolved on Mars with this camera? The distance to Mars at the time is 9.0 × 107 km.
A ball is thrown straight up with a speed of 30 m/s
(a.) How long does it take the ball to reach the maximum height? (b.) What is the maximum height reached by the ball? (c.) What is its speed after 4.2 s?
A dancer begins performing a pirouette with arms extended. (A pirouette is a complete spin about a vertical axis.) This motion is completed most easily when the rotational inertia is decreased by
A. bringing the arms and legs in a line with the body. B. holding the arms straight up and extending one foot straight out to the side. C. bending at the waist at a right angle. D. extending the arms and one leg straight out to the sides.
Graphical Analysis: The figure shows a graph of the velocity of an object as a function of time. What is the acceleration of the object at the following times?(a) At 1.0 s(b) At 3.0 s
What will be an ideal response?