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The Gravitron is a carnival ride that spins up to 21 rpm (revolutions per minute) that appears to pin its passengers against padded seats at it rotates at high speed. If the Gravitron is 6.2 meters in radius, estimate the coefficient of friction of the padded seats. (please explain)
What average thermal power is produced as rock stops?
A book of mass 5.2 kg is resting on a flat level table. You push down on the book at an angle of 25.0 degrees from the horizontal with force of magnitude 236 N. The book starts to slip and is sliding across the table. What is the magnitude of the ..
A 900-kg sports car collides into the rear end of a 2500-kg SUV stopped at a red light. Calculate the speed of the sports car at impact
Two very small spheres are initially neutral and separated by a distance of 0.66 m. What is the magnitude of the electrostatic force that acts on each sphere
A running student has half the kinetic energy that his younger brother has. The student speeds up by 1.3 m/s, at which point he has the similar kinetic energy as his brother. If the student's mass is twice as large as his brother's mass, what were th..
In a test race, an automobile must complete a 10 km run in 4 minutes. If the car goes at 36 m/s for the first 5 km, What must be its speed for the second 5 km
A pet lamb grows rapidly, with its mass proportional to the cube of its length. Find the lamb's mass at the end of this process
Assuming the motor is supplied through an equivalent 208 V source with an impedance of 0.18+j0.15W, determine the voltage at the motor terminals during normal operation (slip of 3%).
A mass of 1.7kg stretches a vertical spring 0.313 m. If the spring is stretched an additional 0.13m and released, how long does it take to reach (new) equilibrium position again.
The coefficient of static and kinetic frictions between a 3 kg box and a desk are .4 and .3 respectively. What is the force of friction on the box
Which one of the following statements is correct concerning the purpose of the surfactant secreted by the alveoli in the lungs?
Two 2.0 cm x 2.0 cm square electrodes, spaced 0.4 mm apart, are connected to a 10 V battery. What is the charge on each electrode
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