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The 2.45kg physics book shown is connected by a string to a 537.0g coffee cup. The book is given a push up the slope and released with a speed of 4.22m/s. The coefficients of friction are mus = 0.382 and muk = 0.248. What is the acceleration of the book if the slope is inclined at 22.5deg?
As morning sunlight falls on a tethered helium balloon, it expands from a volume of 1.05 ×103 m3 to 1.15 ×103 m3. how many joules of solar energy are absorbed
An electron with mass 9.11×10-31 kg moves with a speed of 2.10×106 m/s in a circle of 2.94 cm radius under the influence of a magnetic field. What is the radius of the proton's orbit
Throughout a nuclear reactor accident, 570 m3 of water at 20o C is pumped into the reactor core which is producing heat at the rate of 250 MW. If the water is allowed to boil at normal atmospheric pressure how long would it take to boil away all this..
It takes 2.7×106J of heat to bring a quantity of water from 24?C to a boil. What is the mass of water
Assume that the sun runs out of nuclear fuel & suddently collapses to form a white dwarf star, with a diameter equal to that of the Earth. Estimate the new rotation period of the Sun.
A superball with a mass m = 61.6 g is dropped from a height h = 2.24 m. What is the momentum change of the ball during its collision with the floor
Suppose you are using total internal reflection to make an efficient corner reflector, what must be the minimum index of refraction of the material
A diffraction grating has 3047 lines/cm. Light that contains all wavelengths between 463 and 628 nm shines on the grating. Calculate the width of the dark area
Three long wires (wire 1, wire 2, and wire 3) hang vertically. The distance between wire 1 and wire 2 is 20.0 cm.find the magnitude and direction of the current in wire 3
A small 0.280-kg object moves on a frictionless horizontal table in a circular path of radius 4.30 m. The angular speed is 8.02 rad/s.what is the radius of the smallest possible circle on which the object can move
A Hollywood daredevil plans to jump the canyon shown in the figure on a motorcycle. What is his predicted landing velocity
A group of students have measured the time it takes for a cart to travel some distance along a level track. What is the best estimate of the relative error in their determination of the cart´s speed
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