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A 2000 kilogram car moves down a level highway under the actions of two forces: a 970 Newton forward force exerted on the drive wheels by the road and a 920 Newton resistive force. Use the work-energy theorem to evaluate the speed of the car after it has moved a distance of 35 meter, assuming that it starts from rest.
A 53 kg skier skis directly down a frictionless slope angled at 12° to horizontal. Choose the positive direction of the x axis to be downhill along the slope.
a wave of amplitude ai and wave number ki is incident on the junction of two strings. if the wave number in the second
a 30-cm tall (height) ad 4.0 in diameter plastic tube has a sealed bottom. The mass of the tube if 30.0g. What is the density of the liquid
A student on a piano stool rotates freely with an angularspeed of 3.07 rev/s. The student holds a 1.39 kg mass in eachoutstretched arm, 0.759 m from the axis of rotation. compute the initial and final kinetic energy of the system
If a visible photon by wavelength 434 nm is emitted from an atom in a hydrogen gas lamp, what energy state was the atom in before the photon was emitted? That is, what was the number for that state?
two hikers on opposite sides of a canyon each stand precisely 525 meters above the canyon floor. they each sight a
A house has a floor area of 115 m2 and an outside wall that has an area of 24 m2. Determine the magnetic flux through the wall if the wall faces east
A cannon ball is fired at an angle of 22 above horizontal with an initial speed v0 = 300 m/s, reaching a maximum height h before hitting the ground. What is the maximum height h reached by the ball
Laser light at 635 falls on a double-slit apparatus with slit separation 6.9 .Find out the separation between the third and fourth bright fringes, as seen on a screen 1.4 from the slits.
A 0.144 kg baseball is moving towards home plate with a speed of 43.0 m/s when it is bunted. The bat exerts an average force of 6.50 Ã? 103 N on the ball for 1.30 ms, What is the final speed of the ball
You have a 250-? resistor and a 0.400-H inductor. Suppose you take the resistor and inductor and make a series circuit with a voltage source that has a voltage amplitude of 28.0V, What is the voltage amplitude across the resistor
The body in the figure is pivoted at O, and two forces act on it as shown. If r1 = 2.65 m, r2 = 2.20 m, F1 = 4.24 N, F2 = 5.71 N, ?1 = 63.0°, and ?2 = 55.0°, what is the net torque about the pivot
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