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A combination lock has a 1.5cm -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 0.66N as you twist your wrist. Suppose the coefficient of static friction between the knob and your fingers is only 0.13 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?
The rails are laid on a winter day when their temperature is 1.8°C. (a) How much space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 32.2°C
A sphere of radius R = 0.325 m and uniform charge density -151 nC/m3 lies at the center of a spherical, find the magnitude of the electric field at the following radial distances from the center of the charge distribution
Light of wavelength 572 nm illuminates a single 0.72 mm wide slit. What is the width of the central maximum
A hotel elevator ascends 273 m with a maximum speed of 3.78 m/s. Its acceleration and deceleration both have a magnitude of 0.91 m/s2. How long does it take to make the complete trip from bottom to top?
The howler monkey is the loudest land animal and can be heard up to a distance of 1.3km. determine The acoustic power emitted by the howler
The ends of two thin glass tubes are stuck in the same pool of water. Although both tubes are thin, one tube has a smaller inside diameter (Tube 1) than the other (Tube 2). Both tubes are made of the same material. Would you expect the level in Tu..
An astronaut weighs 7*10^2 N on the surface of the earth (M earth=5.98*10^24 kg). What is her weight 7.70*10^6 m above the earth.
A small but measurable current of 8.4 x 10-10 A exists in a copper wire whose diameter is 2.9 mm. calculate the current density and electron drift speed
What if the acceleration is not constant? A particle starts from the origin with velocity 6i m/s at t = 0 and moves in the xy plane with a varying acceleration given by a = (2?tj) m/s2, find the position of the particle as a function of time
What is the ratio of the cardinals magnitude. One mole of tungsten (6 1023 atoms) has a mass of 184 grams, and its density is 19.3 grams per cubic centimeter. You have a long thin bar of tungsten, 2.3 m long, with a square cross section, 0.15 cm on..
You run a microwave for 6 minutes together with a 1500 W boom-box and a 2800 W space heater. What is the power of your microwave
What is the launch speed of a projectile that rises vertically above the Earth to an altitude equal to five before coming to rest momentarily.
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