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There is a current of 0.40 A flowing through a light bulb when it is connected to a 12.0 V battery. (a) What is its resistance? (b) How much power does it use? (c) How much charge passes through it in one hour? (d) How many electrons pass through the bulb in this time?
A string is stretched between fixed supports separated by 75.0 cm. It is observed to have resonant frequencies of 288.0 and 384.0 Hz, What is the lowest resonant frequency for this string
Two curves on a highway have the same radii. However, one is unbanked and the other is banked at an angle ?. Find the angle of the banked curve
A 1200-kg car rolling on a horizontal surface has speed = 60 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.2m . What is the spring stiffness constant of the spring? in N/m
Calculate the potential energy of a rock with a mass of 55 kg while sitting on a cliff that is 27 m high.
Experience shows that from one third to one half of the passengers in an airliner can be expected to suffer motion sickness, What is the amplitude of the motion
The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket provides. What is the current coming from the wall socket
A sodium surface, which has a work function of 2.46eV is illuminated with a wavelength = 300nm light. What is the deBroglie wavelength of these electrons
An 82.0 kg skydiver jumps out of a balloon at an altitude of 1 280 m and opens the parachute at an altitude of 190 m. what is the speed of the diver when he lands on the ground
A solid cylinder of mass 10 kg is pivoted about a frictionless axis thought the center 0. A rope wrapped around the outer radius R1=1.0m, what is the angular acceleration of the disk
A solid, uniform ball rolls without slipping up a hill, as shown in the figure . At the top of the hill, it is moving horizontally; then it goes over the vertical cliff. How fast is it moving just before it lands
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -95?C. By how much does her mass increase
Find the speed of an orbiter in a circular orbit that is just above the surface of a planet, given that the orbiter's acceleration is equal to the planet's gravitational acceleration of 2.13 m/s2
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