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A ramp inclined at 60.0 degrees with respect to the horizontal rests on a floor. The mass of the ramp is 10.kg, and the coefficent of static friction between the bottom of the ramp and the floor is .8. A 5.0 kg block is then placed on the inclined surface of the ramp. Assume that the ramp remains stationary with respect to the floor and that friction between the ramp is negligible. What is the magnitude of the frictional force? Suppose a block with a different mass were placed on the ramp. If the mass of this block were large enough, the frictional force would not be enough to keep the ramp stationary. What is the maximum the mass of the block could be if the ramp is to remain stationary?
Two cesium-133 atomic clocks differ by one second in 6000 years. Assume one of the clocks gains one second in six thousand years, approximately what is the change in the number of oscillations of the light each second?
A 73.0 kg construction worker stands at the far end of the beam.What is the magnitude of the torque about the point where the beam is bolted into place .
A person drives a car around a circular cloverleaf with a radius of 64 m at a uniform speed of 10 m/s. What is the acceleration of the car
The average density of the planet Jupiter is 1327 kg/m3. The acceleration of gravity on its surface is 25.94 m/s2. Calculate the average radius of Jupiter
During a 75-ms interval, a change in the current in a primary coil occurs. What is the change in the primary current
A clean copper surface is exposed to light of wavelength 275 nm. What is the maximum speed of the photoelectrons emitted from this surface? Use the table below copper=4.7eV.
One day when you come into physics lab you find several plastic hemispheres floating like boats in a tank of fresh water. What is the mass of the heaviest rock that, in perfectly still water, won't sink the plastic boat
Determine the distribution of charge which is responsible for creating this electric field. Hint: consider a Gaussian surface which is a cylinder of radius R
It is desired to cool iron parts from 500°F to 100°F by dropping them into water that is initially at 55°F. how many kilograms of water are needed per kilogram of iron
question1if argentinosaurus a long-necked gigantic sauropod had a head height of 19 m and a heart height of 7.9 m what
The position function x(t) of a particle moving along an x axis is x = 4.0 - 4.5t2, with x in meters and t in seconds. 1) At what negative time does the particle pass through the origin? 2) At what positive time does the particle pass through the ..
A capacitor is made from two hollow, coaxial, iron cylinders, one inside the other. The inner cylinder is negatively charged and the outer is positively charged; the magnitude of the charge on each is 19.0pC. The inner cylinder has a radius of 0.3..
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