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Water flows at 0.855 m/s from a hot water heater, through a 450-kPa pressure regulator. The pressure in the pipe supplying an upstairs bathtub 3.70 m above the heater is 414-kPa. What's the flow speed in this pipe?
A certain LCD projector contains a single thin lens. An object 29.5 mm high is to be projected so that its upright image fills a screen 2.52 m high. Find the focal length of the projection lens
A mass m1 = 3.2 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 4.3 kg which hangs freely from the string, How much work is done by gravity on the two block system
A helicopter lifts a 72 kg astronaut 19 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/12. How much work is done on the astronaut
A sound wave of frequency 400 Hz has an intensity of 2.00 µW/m2. What is the amplitude of the air oscillations
An electron is trapped in a one-dimensional infinite well and is in its first excited state. What is the width of the potential well
A 0.10g honeybee acquires a charge of 25pCwhile flying, What is the ratio of the electric force on the bee to the bee's weight
A transformer is constructed that has 120 turns of wire on the primary side and 430 turns of wire on the secondary (load) side. what is the AC current measured on the secondary side
A 1.0 mCi source of Phosphorus called P-32, a beta emitter, is imlanted in a tumor where it is to administer 36 Gy. The half-life is 14.3 days and 1 mCi delivers about 10 mGy/min/ Approximately how long should the source remain implanted?
An oil rig in the gulf is held at its designated drilling location by 3 tugboats. tugboat A oulls with 42000 N straight in the east direction, find the magnitude of the tension of the ropes attached to tugboats B and C
A microwave transmitter emits electromagnetic waves of a single wavelength. The maximum electric ?eld 1.36 km from the transmitter is 6.26 V/m. Calculate the total power emitted by the transmitter
In coming to a stop, a car leaves skid marks 82m long on the highway. Assuming a deceleration of 6m/s2, estimate the speed of the car just before braking.
A sinusoidal wave of wavelength 1.94 m and amplitude 0.0584 m travels with a speed of 0.878 m/s on a string. What is the maximum speed of any point on the string
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