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A rock is suspended by a light string. When the rock is in air, the tension in the string is 39.1 N. When the rock is totally immersed in water, the tension is 29.3 N. When the rock is totally immersed in an unknown liquid, the tension is 16.6 N. What is the density of the unknown liquid?
A series RLC circuit has components with the following values: L = 18.0 mH, C = 90.0 nF, R = 10.0 ?, and ?Vmax = 100 V, with ?v = ?Vmax sin ?t. Find the resonant frequency of the circuit
Suppose Galileo's pulse rate was 68 beats per minute. What is the time between consecutive pulse beats
A box starts out at the top of a frictionless ramp, then slides down. The ramp has a height h = 3 meters and a slope of 5 degrees with respect to the ground. What does this make the velocity of the box at the bottom
What is the force of gravity on the satellite if it moves towards Earth so its distance is now one half the original distance and
wo converging lenses are placed 60.0 cm apart. The intial object is placed 28.7 cm in front of the first lens. what is the total linear magnification for the system
A 61kg skydiver can be modeled as a rectangular "box" with dimensions 21cm x 37cm x 1.8m. What is his terminal speed if he falls feet first
A string 0.5 m long with mass density 0.0003 kg/m and is vibrating 200 cycles per second. What hanging mass would produce this tension
A submarine dives to a depth of 157 feet in the ocean. What is the force (in pounds) acting on a hatch
A 65 kg crate slides on a rough plane inclined upward at an angle of 28 degrees, what is the magnitude of the sliding friction force on the box, what is the coefficient of kinetic friction between teh box and the incline
A 0.33kg block is located 0.2 m from the center of a turntable. The coefficient of static friction between block and surface of the turntable is 0.44.
The speed of a projectile when it reaches its maximum height is 0.38 times its speed when it is at half its maximum height
What is the internal resistance of an automobile battery that has an emf of 12.0 V and a terminal voltage of 16.5 V while a current of 7.50 A is charging it
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