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The pull cord of a lawnmower engine is wound around a drum ofradius 6.00 cm. While the cord is pulled with a force of 75 Nto start the engine, what magnitude torque does the cord apply to the drum?
A 2.0 ? resistor is connected across a 6.0 V power supply. An ammeter with internal resistance of 1.0 ? is used to measure the current in this circuit. What is the ammeter reading
Sound waves travel through an aluminum bar at a speed of 1400 m/s. what is the distance between crests on a sound wave traveling through aluminum
what is the horizontal distance x between the two balloons.
A 62 g Frisbee is thrown from a point 1.3 m above the ground with a speed of 15 m/s. What was the reduction in the mechanical energy of the Frisbee-Earth system because of air drag
A motor has an internal resistance of 12 ohms. When running, the motor has a back emf of 30 V and draws a current of 4.0 A. What is the supply voltage in this case
A 1.70-kg block slides with a speed of 0.985 m/s on a frictionless horizontal surface until it encounters a spring with a force constant of 695 N/m. Calculate the kinetic energy of the block
A skydiver reaches a "terminal velocity" of 120 km/h. If the skydiver has a mass of 59kg, what is the magnitude of the upward force on the skydiver
a 3.5 cm diameter circular coil with 29 turns of wire has resistance 1.6 omega. this coil is placed inside a solenoid
An 8cm^3 ice cube is floating in a 10x10x10 cm glass container completely filled with water, How much water is going to spill over when the ice melts
A person is nearsighted and can clearly focus on objects that are no farther than 2.6 m away from her eyes. What is the focal length of the borrowed glasses
In a two-slit experiment, the third bright fringe away from the central fringe is observed at an angle 7 degrees. what is the distance between the two slits
The motor of a fan turns a small wheel of radius rm = 2.23 cm. This wheel turns a belt, which is attached to a wheel of radius rf = 3.07 cm that is mounted to the axle of the fan blades. Measured from the center of this axle, the tip of the fan bl..
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