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A block of mass 250.0 g is at rest on a plane inclined at 30.0 degrees to the horizontal. The coefficient of kinetic friction between the block and the plane is 0.140. The block is attached to a second block of mass 590.0 g that hangs freely by a string that passes over a frictionless and massless pulley, at the top of the incline. Find the speed of the second block when it has fallen 35.0 cm.
An induction cooktop generates an alternating magnetic field B(t)=(0.25 T)cos??t. Calculate the maximum emf induced in a pan modeled as a ring of radius 10 cm
A car (mass = 1170 kg) is traveling at 42 m/s when it collides head-on with a sport utility vehicle (mass = 2330 kg) traveling in the opposite direction
The spaceship Lilac, based on the Purple Planet, is 791 m long, as measured at rest. When Lilac passes Earth, Terran observers measure its length to be 733 m.
An electron is in the sixth excited orbit of hydrogen, corresponding to n = 7. Find the wavelength of the electron in this orbit
given heat 1000 j is input to a carnot engine at 300 degrees celsius and waste heat rejected at 10 degrees C. find the thermal efficiency of the engine and the work performed
A bicycle has wheels with a diameter of 0.680 m. It accelerates uniformly and the rate of rotation of its wheels increases from 211 rpm to 280 rpm in a time of 28.9 s. Find the linear (tangential) acceleration of the rim of the bicycle's wheels..
A father pulls his young daughter on a sled with a constant velocity on a level surface a distance of 10m. how much work does the father do
A typical lightbulb in your house is rated 200 W, which means that the bulb dissipates 200 W when connected to a DC voltage of 110 V. (a) What is the current through the lightbulb? (b) If the voltage is reduced to 55 V, what is the dissipated powe..
Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 12.1 m/s toward the east, What was the initial speed of the northward-moving vehicle
The mass then travels vertically and it takes 1.10 s for the mass to reach the top of its trajectory. Determine the spring constant, in N/m. (Use g=9.81 m/s2). Assume that the time required for the spring to reach its full extension is negligible.
Consider two forces exerted on a 65kg object: one 200. N acting at 25 degrees and another of 100. N acting at 45 degrees. find the net force acting on the object
two students stand poised to leap off a high dive structure into teh swimming pool below. Student B is twice as massive as student A. Find the magnitude of velocity of canoe relative to river.
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