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a gardener holds a hose 0.75 m above the ground such that the water shoots out horizontallyandhits the ground at a point 2.0 m away. what is the speed with which the water leaves the hose?
a 0.90 kg book rests on a table. A downward force of 3.5 N is exerted on the top of the book by a hand pushing down on the book. What is the gravitational force acting on the book
A 1.00×104kg railroad car is rolling at 3.00m/swhen a 7000kg load of gravel is suddenly dropped in. What is the car's speed just after the gravel is loaded
With what force F should she pull down on the rope to accelerate herself and platform upward at a rate of 0.77 m/s2.
A 40 N force applied at an angle of 37 degrees above the horizontal pulls a 5kg box on a horizontal floor. The acceleration of the box is 3m/s2 . How large a fritional force must be retarding the motion of the box?
Find the point between the earth and the moon where the graviational potential is a maximum. Give the distance of this point to the center of the earth
With what speed must a ball be thrown vertically from ground level to rise to a maximum height of 35 m
a 2800 kg space vehicle initially at rest falls vertically from a height of 3000 km above the earths surface.determine
The generator at a power plant produces AC at 23,000 V. A transformer steps this up to 335,000 V for transmission over power lines. how many turns must there be in the output coil
A 1.2-lb kite with an area of 6 ft2 flies in a 20-ft/s wind such that the weightless string makes an angle of 55° relative to the horizontal. If the pull on the string is 1.5 lb, determine the lift and drag coefficients based on the kite area.
Two very large charged parallel metal plates are 10.0cm apart, How much work has the electric field done on this proton by the time it reaches the positive plate
Unpolarized light of intensity I0 is incident on a stack of 7 polarizing filters, each with its axis rotated 12o with respect to the previous filter. Find the ratio between light intensity emerges
2 moles of ideal gas are kept at 57C while it expands to twice its volume. The work done by the gas = 3.8 kJ What is the change in entropy of the gas
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