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A 107 ball is tied to a string. It is pulled to an angle of 4.20 and released to swing as a pendulum. A student with a stopwatch finds that 17 oscillations take 9.00. How long is the string?
A Carnot engine has an efficiency of 0.861, and the temperature of its cold reservoir is 381 K. Determine the temperature of its hot reservoir
A cylinder of mass 14.0 kg rolls without slipping on a horizontal surface. At a certain instant its center of mass has a speed of 7.0 m/s. find the translational kinetic energy of its center of mass
A defibrillator passes a brief burst of current through the heart to restore normal beating. In one such defibrillator, What is the initial current through the patient
The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and runs 49 m in a straight line, Determine the cheetah's average acceleration during the short sprint
The star Sirius is a distance of 8 light-years from the earth. If Sirius suddenly stopped shining, how much longer would it be seenon earth
A positive charge +q1 is located to the left of a negative charge ?q2. On a line passing through the two charges, What is the distance between the charges
A uniform solid disk with a mass of 26.3 kg and a radius of 0.214 m is free to rotate about a frictionless axle. What is the net torque produced by the two forces
What is the maximum number of dark fringes that will be produced on both sides of the central maximum if light (? = 619 nm) is incident on a single slit that is 5.27 × 10-6 m wide
Calculate the commutation relation for the inner product of position and momentum and angular momentum. In other words, what is: [p\cdotr, L] (vector p dotted with vector r, vector L)
Two cubes with sides of length 168.4 mm fit in a space that is 337.8 mm wide, as shown in the figure. One cube is made of aluminum, and the other is made of brass. What temperature increase is required for the cubes to completely fill the gap? (The l..
A 32 cm long solenoid, 1.8 cm in diameter, is to produce a 0.24 T magnetic field at its center. If the maximum current is 5.7 A, how many turns must the solenoid have
A 1850-kg car experiences a combined force of air resistance, At what angle is the hill inclined above the horizontal
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