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A lead block is suspended from the underside of a 0.5 kg block of wood of density of 668 kg/m3. If the upper surface of the wood is just level with the water, what is the mass of the lead block?(The density of lead is 11340 kg/m3)
a sinusoidal sound wave is described by the displacement sxt sm coskx - omegat where sm 4.89 mum k 12.4 radm and
If a negative charge is initially at rest in an electric field, will it move toward a region of higher potential or lower potential? What about a postive charge? How does the potential energy of teh charge change in each instance?
A pendulum consists of a 3 kilogram bob at the end of a 2 meter long light string, suspending the bob from a pivot. Determine the net torque on the bob about the pivot
f the original electric field due to a charge is 8.0 × 105 N/C, determine the magnitude of the new electric field at twice the distance from the charge
Two microscope slides are placed one on top the other. They are in contact at one end but a hair separates them at the other end. What is the thickness of the hair
Water (which can be considered to be an ideal fluid for this question) flows at a rate of 25L/min through a pipe of diameter7.0cm at a pressure of 6.0Pa. At one point in the horizontal pipe, calcium deposits reduce the cross-sectional area to 30cm2. ..
A particular engine has a power output of 6.00 kW and an efficiency of 21.0%. Assume the engineexpels 8500 J of energy in each cycle. Find the time required to complete each cycle
Two fixed navigation beacons mark the approach lane to a star. Determine the time interval of the passage
The barrel has a length of 0.60 m and an opening whose radius is 2.8 10-3 m. A bullet (mass = 2.7 10-3 kg) has a speed of 380 m/s after passing through this barrel. Ignore friction and examine the average pressure of the expanding gas.
a 592.5 n window washer is standing on a uniform sca?old supported by a vertical rope at each end. the sca?old weighs
two beetles run across flat sand starting at the same point. beetle 1 runs 0.46 m due east then 0.75 m at 31o north of
Two identical 0.12 kg blocks (labeled 1 and 2) are initially at rest on a nearly frictionless surface, connected by an unstretched spring, What is the final vibrational energy of the real system
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