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A piece of wood is 0.700m long, 0.300m wide, and 8.00×10?2m thick.
Its density is 600kg/m3 . What volume of lead must be fastened underneath it to sink the wood in calm water so that its top is just even with the water level?
What is the mass of this volume of lead?
A charge of 2.5 Coulombs is uniformly distributed throughout a nonconduction sphere of radius 0.15 m. calculate the charge density in the sphere
a robot unloads a completed component from a machine and places it on a gravity conveyor. the conveyor accelerates from
A metal rod with a length of 22.0cm lies in the xy-plane and makes an angle of 37.9 degrees with the positive x-axis, What is the magnitude of the emf induced in the rod
The North Star (Polaris) is a distance 431 ly away and radiates energy in the form of light at a rate of 8.6 x 1029 W. What is the intensity of this light at the Earth
Electromagnetic waves propagate through what? What is oscillating? What determines the velocity c in free space
A parallel-plate capacitor has fixed charges +Q and -Q. By what factor does the energy stored in the electric field change
The tub of a washer goes into its spin cycle, starting from rest and gaining angular speed steadily for 9.00 s, how many revolutions does the tub turn while it is in motion
What is the gas pressure? Give your answer in atm. The gas then undergoes an isothermal compression until the pressure is 3.1atm, What is the final temperature of the gas
The second ball, after rising, falls and also strikes the ground below. If air resistance can be neglected and if your downward and upward initial speeds are the same, explain how will the speeds of the balls compare upon striking the ground?
A child pulls on a wagon with a horizontal force of 75 N. If the wagon moves horizontally a total of 42 m in 3.4.0 min, what is the average power generated by the child
An experimental measurement has a result 7.95 +- 0.01, and a predicted value of 8.00. What is the percent uncertainty in the measurement
A cylinderical water tank of radius 10ft and height 30ft is half filled with water. How much work is essential to pump all of the water out through a hole in the top of tank.
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