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If the operators of a spy satellite pondered using it to photograph license plate numbers. The camera uses a lens with a diameter of 2.7 m. The satellite orbits at a height of 160 km. When using a 560 nm light, what is the smallest distance between two points that it can resolve?
Cm
How numerous atoms does each hand contain
Two protons are moving directly toward one another. When they are very far apart, their initial speeds are 2.10 x 105 m/s. What is the distance of closest approach?
If the frequencies are swept over a plusminus.gif2.00% range centered on 86.0 MHz, what is the range of wavelengths broadcast
A small ball of 53 grams is suspended from a string of length 86 centimeters and whirled in a circle lying in the horizontal plane. If the string makes and angle of 31 degrees with the vertical, find out the centripetal force experienced by the ball...
A device known as Atwood\'s machine consists of two masses hanging from the ends of a vertical rope that passes over a pulley. Assume the rope and pulley are massless and there is no friction in the pulley.
Suppose it was launched form a launch pad in a space vacuum. Would it work? Illustrate what changes would we observe? Explain
The box is cubical, measuring 0.390 m on a side, and the thickness of the walls is 3.00 10-2 m. In one day, 2.90 106 J of heat is conducted through the six walls. Find out the thermal conductivity of the box.
A 25 kg cannon shell is subjected to a constant acceleration of 1200 g while in the cannon barrel. What force is the burning propellant exerting on the shell?
A water balloon slingshot launches its projectiles essentially from ground level at a speed of 25.0m/s, For how many seconds will the balloon be in the air
Starting from rest, a 98 kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 800N, and his speed at the bottom of the pole is 3.2 m/s. How far did he slide down the pole.
A box with a mass of 6 kg is lifted (without acceleration) by a height of 6.0 m in order to place it upon the shelf of a closet.
The second person, on the opposite side of the lock, pulls at an angle of 45o. Illustrate with what force should the second person pull so that the net force on the raft is in the forward direction?
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