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The work required to stretch a certain spring from anelongation of 4cm to 5cm is 30.5J. What is the work required to increase the elongation from 5cm to 6cm?
A force with a magnitude of 25 N and directed at an angle of 37° above the horizontal is used to move a 10-kg crate along a horizontal surface at constant velocity
A butterfly fliest from the top of a tree in the center of a garden to rest on top of a red flower at the garden's edge. The tree is 8 m taller than the flower, and the garden is 12 m wide. Determine the magnitudes of the butterfly's displacement?
A 150-W lamp is placed into a 120-V AC outlet. What is the resistance of the lamp
The amount of 14C in an old, isolated sample of vegetation is 0.757 that expected from a present day sample with an equivalent carbon content, Calculate the age of the old sample in years
A ball of mass 0.55 kg moves around a vertical circle of radius 1.2 m. Find the tension of the string T
A 58.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.38 102 m/s from the top of a cliff 156 m above level ground, What is the initial total mechanical energy of the projectile
An object of mass 5.0 kg is projected into the air at a 55° angle. It hits the ground 3.9 s later. What is its change in momentum while it is in the air
A 10.3 kg block is dragged over a rough, horizontal surface by a 63.6 N force acting at 21° above the horizontal. Find the total change in the block's kinetic energy
A string under a tension of 60.0 N is used to whirl a rock in a horizontal circle of radius 2.70 m at a speed of 20.5 m/s on a frictionless surface as shown in the figure below. As the string is pulled in, the speed of the rock increases. When the st..
Two 1.6V. batteries are connected together in series to a bulb whose resistance is 60 ohms. How many electrons leave each battery per minute
Presume that the strength of the electric ?eld about an isolated point charge has a certain value at a distance of 4 m.
Arranged on the floor are five concrete blocks, each 28.4kg and 0.265m tall. What is the minimum work required to stack all five vertically
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