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A U-tube contains liquid of unknown density. An oil of density 762 kg/m3 is poured into one arm of the tube until the oil column is 10 centimeter high. The oil-air interface is then 5 centimeter above the liquid level in the other arm of the U-tube. Evaluate what the density of the liquid.
A wrecking ball is hanging at rest from a crane when suddenly the cable breaks. Find the time it takes for the ball to fall from rest all the way to the ground
Two balls of identical mass m are connected by a 0.84 meter long cord and located on a smooth frictionless table 1.37 meter high. Find the balls speed when the first ball hits the floor
Calculate the resistance per unit length of a nichrome wire, which has a radius of 0.182 mm. The resistivity of nichrome is 1.5 × 10^?6 ? · m
a 1.0cm -tall candle flame is 2.0m from a wall. you happen to have a lens with a focal length of 42cm . a how many
A worker pushing a 35.0-kg wooden crate at a constant speed for 11.5 m along a wood floor does 320 J of work applying a constant horizontal force of magnitude F0 on the crate. (a) Determine the value of F0. (b) If the worker now applies a force great..
What is the minimum coefficient of static friction between the road and the tires on a car for the car to go around a flat curve at 45.0 mph
A high performance solar panel is 24" by 54". Its maximum power output is 100W when placed under full sunlight. What is the efficiency of this panel
You are designing a delivery ramp for crates containing exercise equipment. Calculate the maximum force constant of the spring kmax that can be used in order to meet the design criteria
You are investigating an accident where a 1500 kg car that was parked without its emergency brake on rolled down a hill with a slope of 8 degrees a distance of 150 m, How fast was the car moving when it hit the van
A 2.93-kg model rocket is launched vertically upward with sufficient initial speed to reach a height of 3.71·102 m, even though air resistance (a nonconservative force) performs -6.11·102 J of work on the rocket.
A force does +130 Joule of work when it acts on a moving object and its direction is in the similar direction as the object's displacement. Find how much work does this force do
a 17.0-n block rests on a horizontal surface. the coefficients of static and kinetic friction between the surface and
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