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The flowmeter shown in the figure measures the flow rate of water in a solar collector system. The flowmeter is inserted in a pipe with inside diameter 2.1 cm; at the constriction the diameter is reduced to 0.61 cm. The thin tube contains oil with density 0.83 times that of water. If the difference in oil levels on the two sides of the tube is 1.3 cm, what is the volume flow rate? Please express your answer with the right units.
Consider a cell phone that emits electromagnetic radiation with a frequency of 1.0 GHz and with a power of 70 W. What is the electric field amplitude at a distance 1020 m away from the phone
A thin lens made of glass has a focal length in air of 16.3 cm. A lens of exactly the same shape is then made from diamond. What is the focal length of the diamond lens in air
A student driving at a constant speed of 45 m/sec passes a highway patrol car parked on the side of the road. How long does it take to over take the student
The third-order fringe of 650 nm light is observed at an angle of 30°, How far apart are the slits
When n moles of an ideal gas is allowed to expand from an initial volume of 10 m3 at a constant temperature T the work done is equal to : - nRT ln 4, What was the final volume of the gas
A light spring-gun projectile launcher is mounted on an 0.453 kg air track glider. The gun points upward at an angle of 32 o with the horizontal track. What is the speed of the air-track glider after the gun is fired
An electron with mass 9.11×10-31 kg moves with a speed of 2.10×106 m/s in a circle of 2.94 cm radius under the influence of a magnetic field. What is the radius of the proton's orbit
The work function for platinum is 6.35 eV. Find the cutoff wavelength for platinum
q1. a magnifier has a magnification of 8 times. how far from the lens should an object be placed so that its virtual
A rod with an initial length of 4.67 m i heated from a temperature of 5 oC to 58 oC. What is the new total length of the rod
A light ray of ? = 430 nm enters at an angle of incidence of 36.2o from air into a block of plastic. Its angle of refraction is 21.7o. What is the speed of the light inside the plastic?
A ball is thrown straight up from the ground with speed v 0 . At the same instant, a second ball is dropped from rest from a height H , Find the time at which the two balls collide
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