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A child slides down a slide with a 29o degree incline, and at the bottom her speed is precisely one-fourth what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child.
You need to use your cell phone, which broadcasts an 828 MHz signal, but you're in an alley between two massive, What is the angular width, in degrees, of the electromagnetic wave
question an electric car is designed to run off a bank of 12-v batteries with total energy storage of 3.0 times 107 j.
A 170 ball is dropped from a height of 1.8 , bounces on a hard floor, and rebounds to a height of 1.0. What maximum force does the floor exert on the ball
A 7.5 cm diameter horizontal pipe gradually narrows to 6 cm. When water flows through this pipe at a certain rate, What is the volume rate of flow
Three capacitors, C1 = 3.30 µF, C2 = 7.26 µF, and C3 = 1.23 µF, are connected in series, What is the charge on the positive plate of the capacitor C2
A 390 nm thick film floats on a puddle of water. When illuminated normally with 700 nm light there is no reflection, but 400 nm light is strongly reflected. What is the film's index of refraction
A solid cube of iron (density = 7.87 g/cm3) has a mass of 88.0 g. What is the resistance between opposite faces of the cube
two trains face each other on adjacent tracks. they are initially at rest and their front ends are 36 m apart. the
A container holds 2.9 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 8.1x10-3 kg bullet with a speed of 750 m/s
An Olympic high jumper wants to cross a bar 1.9 m off the ground while mantaining a velcity of 1.48 m/s. How fast does she have to run to accomplish this
You throw a 25.0 N rock into the air from ground level and observe that, when it is 14.0 m high, find the rock's speed just as it left the ground
A capacitor is a device used in a variety of electronic circuits. In a simple design a capacitor consists of two parallel metal plates of area A separated by a distance d. When the plates are connected to the positive and negative terminals of a b..
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