What is the speed of the arrow as it leaves the bow
An 80 g arrow is fired from a bow whose string exerts an average force of 95 N on the arrow over a distance of 84 cm. What is the speed of the arrow as it leaves the bow?
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A severe thunderstorm dumps 1.5 in. of rain in 30 min on a town of area 38 km2. What volume of water, in acre-feet, fell on the town?
A Hill that has a 12.0% grade is one that rises 12.0m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal?
A mass of 3.0 kg rests on a smooth surface inclined 28 degrees above the horizontal. It is kept from sliding down the plane by a spring attached to a wall. The spring is aligned with the plane and has a spring constant of 120 N/m. How much does th
The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum of 70.0 cm, what was the speed of the bullet at impact with the block?
For a particular scientific experiment, it is important to be completely isolated from any magnetic field, including the earth's field. A 1.50m-diameter current loop with 220 turns of wire is set up so that the field at the center is exactly equal
If the atom's diameter is 1 10-10 m in its lowest energy state, what is its diameter in state number 41? How many unexcited atoms could be fit within this one giant atom?
A researcher would like to perform an experiment in a zero magnetic field, which means that the field of the earth must be canceled. Suppose the experiment is done inside a solenoid of diameter 1.2m, length 3.0m, with a total of 7000 turns of wire
A string 1.50 m long will break if the tension in it exceeds 2.00X10^2N. How fast (in m/s) can a rock of mass 1.50 kg be whirled in a circular horizontal path if the string is not to break? Assume the rock moves on a smooth horizontal surface (No
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