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A 1750-kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car goes up or down a hill at 24 m/s. Going up a hill, the car's engine produces 44 hp more power to sustain the constant velocity than it does going down the same hill. At what angle is the hill inclined above the horizontal?
A 2-kg block rests on top of a table 80 cm from the floor. Find the potential energy of the book relative to the floor
A commuter train blows its horn as it passes a passenger platform at a constant speed of 35.0 m/s. t is the frequency observed by a person on the platform as the train approaches
To keep a door closed, a wooden stick is wedged between the floor and the doorknob. The stick exerts at B a 45-lb force directed along line AB. Swap that force with an equivalent force-couple system at C.
Light of wavelength 650 nm is incident normally upon a glass plate. What is the highest order bright fringe
An idealized voltmeter is connected across the terminals of a 12.5-{\rm V} battery, and a 73.5-\Omega appliance is also connected across its terminals. What is the internal resistance of the battery?
A potential energy function for a two-dimensional force is of the form U = 3.89x3 y - 5.96x. Calculate the force that acts at the point (1.28m,1.17m). Enter the x-component first and then the y-component.
A cylinder with moment of inertia 18.8 kg m2 rotates with angular velocity 7.85 rad/s on a frictionless vertical axle. Show that energy is lost in this situation by calculating the ratio of the final to the initial kinetic energy
In a Young's double-slit experiment, the wavelength of the light used is 535 nm (in vacuum), Determine the angle in degrees that locates the second dark fringe
A spherical metallic Christmas tree ornament has a diameter of 6.20 cm. If Saint Nicholas is by the fireplace, 1.41 m away, where will he see his reflection in the ornament
A 2.0 kg ball swings in a vertical circle on the end of an 80cm long string. Calculate the speed, magnitude and direction of acceleration
A cube of ice is taken from the freezer at -7.7°C and placed in a99g aluminum calorimeter filled with297g of water at room temperature of 20°C. What was the mass of the ice cube
a car tyre is pumped up to 230 kpa. what is the volume of air at atmospheric pressure 100kpa that must be pumped into a
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