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You push a 2 kg block along a frictionless surface with a constant force. Starting from rest the block reaches a final speed of 2 m/s in 10 m. What is the instantaneous power (in W) that you are supplying 2 seconds after you start pushing?
Assume the masses of the chains, pulleys, and ropes are negligible. Determine the force F required to lift the crate with constant speed. Identify the tension in the upper chain.
Compute the thermal neutron diffusion coefficient characterizing water , graphite and natural uranium. Then compute the extrapolation length zo characterizing these material
A Big Mac has 3,100,000 Joules of chemical energy, what is the cost of the electric energy equivalent to the energy in a Big Mac
A candle is on the axis of a 15-cm-focal-length concave mirror, 36 cm from the mirror. Is the image real or virtual
A particle moves horizontally in uniform circular motion, over a horizontal xy plane, What are the coordinates of the center of the circular path
A baseball outfielder throws a 0.150 kg baseball at a speed of 35.0 m/s and an initial angle of 26.0°. Illustrate what is the kinetic energy of the baseball at the highest point of its trajectory?
The electric potential at a position located a distance of 21.6 mm from a positive point charge of 8.70×10-9C, estimate the value of the second charge
Sound Check, a merchandising company specializing in home computer or speakers, budgets its monthly cost of goods sold to equal 70% of sales. Calculate the budgeted merchandise purchases.
A hollow, conducting sphere with an outer radius of 0.243 m and an inner radius of 0.203 m has a uniform surface charge density of +6.45*10^(-6) C/m^2. What is the new charge density on the outside of the sphere
A 51.0 g sample of a conducting material is all that is available. The resistivity of the material is measured to be 12 ? 10-8, What must be the diameter of the wire
A step-down transformer (turns ratio = 1:6) is used with an electric train to reduce the voltage from the wall receptacle to a value needed to operate the train. What is the current in the primary coil
A 200g block on a frictionless surface is pushed against a spring with spring constant 500N/m, compressing the spring by 2.0cm. at what speed does it shoot away from the spring
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