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A car in an amusement park roller coaster ride rolls without friction at the top of a hill. The car begins at a height h from the top of a hill. A the bottom, the car then goes through a vertical loop where the car is upside down at the loop\'s top. If the height is instead 70m, what is the car\'s speed at the top of the loop? From a 70m height, what is the magnitude of the car\'s radial acceleration? From 70m, what is the magnitude of the car\'s tangential acceleration?
Estimate the terminal velocity for a dust particle in air. Assume it has a radius of 1.0 um and a density similar to that of balsa wood
A classroom demonstration is done with an Atwood machine. The masses are m1 = 1.0 kg and m2 = 1.10 kg. what is the acceleration of gravity at that place
A dive bomber has a velocity of 230 m/s at an angle theta below the horizontal. When the altitude of the aircraft is 2.15 km, it releases a bomb, Find the angle theta
A solenoid has a cross-sectional area of 5.8 x 10-4 m2, consists of 330 turns per meter, and carries a current of 0.41 A. Find the average current induced in the coil
During a physics experiment, helium gas is cooled to a temperature of 19.0K at a pressure of 0.140 atm. What are the average energy per atom
A mini-fridge needs to maintain a temperature of 277 K. The air outside the mini-fridge has a temperature of 301 K. What is the coefficient of performance of this mini-fridge
two uniformly charged insulating rods are bent in a semi circle shape with radius R=12cm. find direction of the elctric field at the center of the circle
q1. air is flowing through a rocket nozzle. inside the rocket the air has a density of 5.25kgm3 and a speed of 1.2 ms.
A 3.1-cm-diameter parallel-plate capacitor has a 2.2mmspacing. The electric field strength inside the capacitor is 1.3×105V/m. What is the potential difference across the capacitor
An unknown resistor is connected between the terminals of a 5.5 V battery. At what rate is energy now dissipated
A cannon tilted up at a 30° angle fires a cannon ball at 65 m/s from atop a 12 m high fortress wall. What is the ball's impact speed on the ground below
A 70 cm diameter wheel accelerates uniformly about its center from 130 rpm to 280 rpm in 4 s. Determine its angular acceleration
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