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Problem: A block of wood of density 0.73 kg/m3 floats in a fresh-water lake.
Part A: What percentage of the wood protrudes from the water?
Please show detailed calculation to find what percentage of the wood protrudes from the water.
How much work does the electric field do in moving a proton from a point with a potential of +175V to a point where it is -50V? Express your answer in joules. Express your answer in electron volts.
A tennis player swings her 1000 g racket with a speed of 12.0m/s . She hits a 60 g tennis ball that was approaching her at a speed of 10.0m/s, What is the target's speed just after the bullet emerges
A potter's wheel having a radius 0.49 meter and a moment of inertia 12.8 kg•m2 is rotating freely at 51 rev/min. Determine what the effective coefficient of kinetic friction between the wheel and the wet rag
A wheel consists of 20 thin spokes, each with mass 0.070kg , attached to a rim of mass 4.4kg and radius 0.85m. Find its rotational inertia
What is the maximum speed of the disk without the block and penny sliding? The accelertion of gravity is 9.8m/s2 (meters persecond squared). Answer in units of rpm.
Evaluate the curvature radius of a concave mirror that produces a9.5-centimeter high virtual image of a5.7 centimeter high object
A white light beam shines directly on a very thin oil film that floats on water, where the incident beam normal to the surface. Find the wavelength and color of the light
A ball rolling down an incline travels 6 cm in the first .25 seconds, and 24 cm in the first .50 seconds. find the average speed for the second quarter second time interval
a duck and a guy named john are sitting on opposite sides of a large merry go round that is rotating clockwise. Describe the motion of the coconut viewed by the students
Near the surface of the Earth there is an electric field of about 150 V/m which points downward. Use conservation of energy to determine the difference in the speed of the two balls when they hit the ground
You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 630 N and that of yourbelongings is 970 N. (a) Determine the work doneby the elevator in lifting you and your belongings up to the 6thfloor (15.2 m) at ..
Timberland’s incremental tax rate is 30%. Prepare a budgeted income statement assuming that Timberland sells 2,500 tons. Illustrate what is the contribution margin per ton?
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