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A special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop at an amusement park. The sensor measures the magnitude of the normal force that the seat exerts on a rider. The loop-the-loop ride is in the vertical plane and its radius is 24 meter. Sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 990 N. At the top of the loop, the rider is upside-down and moving, and the sensor reads 360 N. Determine the speed of the rider at the top of the loop?
A feather is dropped on the moon from a height of 3 meters. Determine the time for the feather to fall to the surface of the moon
A 110 g hockey puck sent sliding over ice is stoppedin 14 m by the frictional forceon it from the ice. If its initial speed was 7.0 m/s, what is the magnitude of the frictional force
An electric charge is uniformly distributed throughout a 12cm radius non conducting sphere. what is the volume charge density of the sphere
A rectangular fish tank measures 30 cm by 75 cm by 40 cm high. The tank is filled with water to a depth of 37 cm. What is the total force of the water on the bottom
An astronaut tries to talk his way out of a traffic violation for running a red light (? = 670 nm) by telling the judge that the light appeared green (? = 540 nm) to him as he passed by in his expensive sports car. If this is true, how fast was the a..
An electric power station is producing 1.2 x 10+3 W of power that is to be sent to a small town located 13 km away. Each of the two wires that comprise the transmission line has a resistance per kilometer of length of 5 x 10-2 Ohms /km. Find the powe..
An aluminum block slides along a horizontal surface. The block has an initial speed of 11.0 m/s and an initial temperature of 10.7degrees C. The block eventually slides to rest due to friction.
A 10 kg dog is standing on scale in an accelerating elevator. If the scale reads 5 kg, what is the acceleration of the elevator
You have a thermodynamic system with three states. You observe the probabilities p1 = 0.9, p2 = 0.09, p3 = 0.01 at T = 300K. What are the energies "2 and "3 of states 2 and 3 relative to the ground state?
A salesperson claims a 1340 kg car has an average acceleration of 3 m/s2 from a standing start to 100 km/h. What average net force is required to do this
a 2.0microf capacitor and a 4.0microf capacitor are connected in series across 1000 v. the charged capacitors are then
A bus is traveling up a hill at a speed of 34m/s. The hill is 23 degrees relative to horizontal and the coefficient of static friction between the bus's tires and the road is 0.6
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