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A block of mass 2.50 kg is pushed 2.20 m along a frictionless horizontal table by a constant 16.0-N force directed 25.0° below the horizontal. Determine the work done on the block by (a) the applied force, (b) the normal force exerted by the table, and (c) the gravitational force. (d) Determine the total work done on the block.
A small circular hole 6.90 mm diameteris cut in the side of a large water tank, 19.0 m below the water level in the tank. The topof the tank is open to the air. Find the speed of efflux
Describe what are the (a) magnitude and (b) direction of the boat's velocity relative to the ground? (c) How long does the boat take to cross the river?
Light of 546 nm wavelength is incident on a cesium surface that has a work function of 1.91 eV. find the threshold wavelength
The distortion of Earth's crustal plates is an example of shear ona large scale. A particular crustal rock has a shear modulus of1.0 1010 Pa. What shear stress is involved when a 10.0km layer of this rock is sheared through a distance of 3.5-m?
The Magadeburg water bridge is a channelbridge over the River Elbe in Germany. It dimensions are length918m, Width 43.0m, Depth 4.25m, What is the pressure on the bridge floor
A long straight wire carries a current of 6.2 A. The wire is horizontal in the plane of the page (screen) and the current is traveling to the left. Calculate the force that acts on the electron
A worker on scaffolding 65 ft above the ground needs to lift a 340 lb bucket of cement from ground to a point 30 feet above the ground by pulling on a rope weighing 5 lb/ft. How much work is required.
By calculation, determine the wavelength of three principal visible lines of hydrogen from energy transitions n=3, 4
A sphere with radius 0.205m has density ? that decreases with distance r from the center of the sphere according to ?=3.25×103kg/m3?(9.25×103kg/m4)r, calculate the moment of inertia of the sphere for an axis along the diameter
An antifreeze solution is made by mixing ethylene glycol (? = 1130 kg/m3) with water. determine the volume percentage of ethylene glycol in the solution
at what temperature will aluminum have a resistivity that is three times the resistivity of iron at room temperature?
A Styrofoam box has a surface area of 0.79 m2 and a wall thickness of 2.0 cm. The temperature of the inner surface is 5.0°C, obtain the thermal conductivity of the Styrofoam
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