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A combination lock has a 1.5 -diameter knob that is part of the dial you turn to unlock the lock. To turn that knob, you grip it between your thumb and forefinger with a force of 0.59 as you twist your wrist. Suppose the coefficient of static friction between the knob and your fingers is only 0.12 because some oil accidentally got onto the knob. What is the most torque you can exert on the knob without having it slip between your fingers?
Two soccer players start from rest, 30 m apart. They run directly toward each other, both players accelerating. How much time passes before the players collide
A ball of mass 7 kg is thrown straight up in the earth's gravitational field with an initial speed v0 = 16 m/s. What is the initial kinetic energy of the ball
A "bug-zapper" uses a voltage of 4000V provided by a transformer that is connected to a standard household source of 120V. what current is drawn from the house current and what is the power required
A solenoid is 1.6 m long and has 530 turns per meter. what is the cross sectional area of this solenoid if it stores .31 J of energy when it carries I=14A
At a fabrication plant, a hot metal forging has a mass of 75 kg and a specific heat capacity of 430 J/(kg·°C). To harden it, the forging is immersed in 710 kg of oil that has a temperature of 32°C and a specific heat capacity of 2900 J/(kg·°C).
Suppose a tank contains 505 m3 of neon (Ne) at an absolute pressure of 1.01Ã-105 Pa. The temperature is changed from 293.2 to 295.8 K
A 580-turn solenoid is 30 long and 1.9 in diameter and carries 67. How much magnetic energy does it contain
A 500 g, 3 m uniform thin rod is pivoted at one end and has a mass 500 g attached to its other end. Ignore friction and air resistance. Find the moment of intertia of the physical pendulum
A race car, traveling at a constant speed of 50 m/s, driver around a circular track of radius 500 m. What magnitude acceleration does it experience
A 15m uniform ladder weighing 500 N rests against a frictionless wall. The ladder makes 60 angles with the horizontal.
A 3400 resistor and a 1.6 µF capacitor are connected in series across a generator (60.0 Hz, 120 V rms). Determine the average power dissipated in the circuit
A parallel- plate capacitor has plates of area .035 m^2 with a separation of 2.0 mm. The space between the plates is filled with a dielectric with k=4.5, What is maximum energy can be stored in the capacitor
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