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Justin moves a desk 4.80m across a level floor by pushing on it with a constanst horizontal force of 340N. (it slides for a negligibly small distance before coming to a stop when the force is removed.) Then changing his mind he moves it back to its starting point, again by pushing with a constant force of 340N.
a) what is the change on the desks gravitional potential energy during the round trip?
The pressure in a traveling sound wave is given by the following equation. p = (2.1 Pa) sin ?[(1.40 m-1)x - (280 s-1)t], Find the pressure amplitude and Find the wavelength
Three point charges, -6.05 10-9 C, -9.40 10-9 C, and +7.25 10-9 C, are fixed at different positions on a circle. What is the radius of the circle
A 73.1-kN car is travelling at 59.9 mph when the driver decides to exit the freeway by going up a ramp. What is the magnitude of the average drag force exerted on the car
A 1.85m diameter wagon wheel makes one revolution in 3.45s. What is the tangential speed of a point in it's rim
A 5.0 ice cube at -20 is in a rigid, sealed container from which all the air has been evacuated. How much heat is required to change this ice cube into steam
The motor of a four wheeler traveling along a muddy trail generates an average power of 7.20 104 W when moving at a constant speed of 11 m/s. What is the tension in the tow rope pulling the log
A uniform 240 N ladder rests against a perfectly smooth wall, making a 40.0 angle with the wall. Find the normal forces that the wall on the ladder
A wooden block with m1 = 3.1kg is sliding across a frictionless surface in the ?x direction at 5.2 m/s. What is the velocity of the m2 block in the lab frame after the collision
The largest building in the world by volume is the Boeing 747 plant in Everett, Washington. It measures approximately 634 m long, 709 yards wide, and 108 ft high. a)What is its volume in cubic feet? b) Convert your result from part A to cubic mete..
Illustrate what constant acceleration does Mary now need during the remaining portion of the race, if she wishes to cross the finish line side-by-side with Sally?
Conclude a rough "scale factor" or "plate scale." Measure the distances in mm or cm between each of the marked wavelengths and average the results.
A lighthouse that rises 49 above the surface of water sits on a rocky cliff that extends 19 from its base. A sailor on the deck of a ship sights the top of the lighthouse at the angle of 30.0 above the horizontal.
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