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Water at the top of Niagara Falls has a temperature of 20.0°C. If it falls a distance of 40.0 m and all of its potential energy goes into heating the water, calculate the increase in temperature of the water at the bottom of the falls.
A car drives north at 42 mi/h for 10 {rm min} and then turns east and goes 5.0 {rm mi} at 62 mi/h. at last, it goes southwest at 30 mi/h for 6.0 {rm min}.
Two very small spheres, each with a mass m = 1.5 g, are suspended from a common axis by insulating threads of length L= 6.0 cm, What is the magnitude of the unknown charge q
A 12 kg mass starts from rest and slides down an inclined plane 8.0 10-1 m long in 0.9 s. What net force is acting on the mass along the incline?
A grinding wheel of radius 0.280 m rotating on a frictionless axle is brought to rest by applying a constant friction force tangential to its rim. Find the magnitude of the friction force
As a summer intern for a microscope company, you are designing a compound microscope for a client that provides you with the following information. determine the barrel length needed for the microscope
A horizontal rod 0.200 m long carries a current through a uniform horizontal magnetic field of magnitude 0.067 T that points perpendicular to the rod. what is the current flowing through the rod
Compare these two ratings by determining the ratio of energy.
At a certain point in a horizontal pipeline, the water's speed is 4.00{\rm m/s}, Find the gauge pressure at a second point in the line
A satellite consists of a sphere of mass 1.00 x 10^3 with two spherical "ears" on retractable booms. The ears each have a mass of 50.0 kg. what will be the angular speed
A sled of mass 8 kg is on a frictionless slope inclined at 35degrees to the horizantal.It is pulled by a rope that makes anangle of 10 degrees with the slope,the tension in the rope is 40N. Find the accerelation of the sled take up the slope as thepo..
The voltage across a resistor is equal to the product of the current through the resistor and the resistance of the resistor, What is the potential difference of the battery
A lever uses an effort arm of 4.75 m and has a resistance arm of 21.5 cm. What is the mechanical advantage of the lever
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