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A 0.75 kg cart has been attached to a spring. The cart is moved to the right by 2.0 cm. Find the spring constant. What is the elastic potential energy stored in the spring? Does this energy depend on the mass of the cart?
two polarizers are oriented at 72 degress to one another. Unpolarized light falls on them. What fraction of the light intensity is transmitted
An electron drops from the 8 to the 6 level of an infinite square well 1.5 nm wide. Find the wavelength of the photon emitted
At time t = 0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0° above the +x axis. As the puck slides, a constant acceleration acts on it that has the following components: ax = –0.360 m/s2 and ay = –0.980 m/s2.
An ac source of period T and maximum voltage V is connected to a single unknown ideal element that is either a resistor, an inductor, or a capacitor. At time t=0 the voltage is zero.
A car travels at a constant speed around a circular track whose radius is 3.1 km, What is the magnitude of the centripetal acceleration of the car
A spring with spring constant 36N/m is attached to the ceiling, and a 5.1-cm-diameter, 1.3kg metal cylinder is attached to its lower end. what length of the cylinder is submerged
A toroid having a square cross section, 4.40 cm on a side, and an inner radius of 13.1 cm has 660 turns and carries a current of 0.801 A. What is the magnitude of the magnetic field inside the toroid
metal sphere of radius 32 cm has a net charge of 3.0 multiply.gif 10-8 C. What is the electric field at the sphere's surface
An AC voltage of rms value 413 V and frequency 75 Hz is connected across a light bulb with a resistance of 471 ohms. What is the rms current and maximum current
A woman in a movie fires a gun and is pushed backwards. The mass of the bullet is 0.050 kg and the bullet velocity is +850 m/s. What is the recoil velocity of the woman
A 60.0 g copper calorimeter cup contains 200.0 g of water at 22.0 Co. How much steam must be condensed into the water
A slinky has a mass of 0.28 kg and negligible length. When it is stretched 1.2 m, it is found that transverse waves travel the length of the slinky in 0.68 s. What is the force constant, k, of the slinky
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