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A dancer is standing on one leg on a drawbridge that is about to open. Before the drawbridge starts to open, it is perfectly level with the ground. The dancer is standing still on one leg. What is the x component (horizontal component) of the friction force?
A rope, assumed massless, is stretched horizontally between two supports that are 3.43 m apart. obtain the tension in the rope
The electron and positron have the same velocity. What is the kinetic energy of the electron
A speedy tortoise can run at 0.01 meters per second and a hare can run 21 times as fast. In a race they both start at the same time; however the hare stops to rest for 1.50 minutes. So the tortoise wins by a shell (20 cm).
A wooden block of mass 2kg, initially stationary is dragged by a force F with magnitude 20 N along a frictionless incline with an angle 0=30 degrees, What is the wooden block acceleration
A battery with an emf of 12.0 V shows a terminal voltage of 11.0V when operating in a circuit with two lightbulbs rated, What is the battery's internal resistance
The gravitational potential energy of all the water stored behind a very large dam is 1.2Ã-10^16 J, How far apart should you place the charges
You have a 1.91-m-long stretched string with a mass of 19.3 g. When you oscillate the string at 440 Hz, obtain the tension in the string
Two Resistors of R1 = 3.23 ohm and R2 = 5.95 ohm are connecred in series to a battery whith an EMF of 24.0 v, Find the current I1 through the first resister
A stone has a mass of 4.00 x10-3 kg and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.76.
A rod is initially at a uniform temperature of 0 o C throughout. One end is kept at 0oC , and the other is brought into contact with a steam bath at 100 o C.
A 2300 kg truck traveling north at 39 km/h turns east and accelerates to 57 km/h. What is the change in the truck's kinetic energy
A charge of -3.9 micro-coulombs is launched from the positive plate of a large capacitor to the negative plate.
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