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An ideal gas, Cp = (7/2)R, is heated in a steady-flow heat exchanger from 70°C to 190°C by another stream of the same ideal gas which enters at 320°C. The flow rates of the two streams are the same, and heat losses from the exchanger are negligible.Calculate the molar entropy changes of the two gas streams for both parallel and countercurrent flow in the exchanger.What is Stotal in each case?
Two point charges and are held in place 4.50 apart. Another point charge -2.5 of mass 6 is initially located 3.00 from each of these charges and released from rest. You observe that the initial acceleration of -2.50 is 354 upward, parallel to the ..
When laser light of wavelength 633.3nm passes through a diffraction grating. thef irst bright spots occur at +- 18.4 degree from the central maximum, At what angle do the second bright spots occur
A laser beam is incident on two slits with a separation of 0.190 mm, and a screen is placed 5.30 m from the slits. what is the wavelength of the laser light
A circular wire loop of area 0.18m squared carries a current of 4 A. the coil lies in a horizontal plane with the current flowing in the counterclockwise direction when viewed from above. At this point the earth’s magnetic field is 1.2x10^-4 T direct..
Light from an argon laser strikes a diffraction grating that has 5 310 grooves per centimeter. calculate vthe wavelength of the laser light
an object is thrown upwards with a speed of 14 m/s. How long does it take it to reach its max height
Two 19 Ohm resistors connected in parallel are then connected in series to a 10 Ohm resistor. What is the current through the 10 Ohm resistor
A motorcyclist is traveling along a road and accelerates for 4.20 s to pass another cyclist. The angular acceleration of each wheel is +6.95 rad/s2, What is the angular displacement of each wheel
question1a 70-g disk sits on a horizontally rotating turntable. the turntable makes 4 revolutions each second. the disk
a student is moving a safe onto a platform. the student needs to push the safe 2.3 m horizontally and then lift it 1.2
a ramp consisting of a large piece of cardboard poster board or similar thin and smooth materiala toy car such as a
A child is playing with a ball on a string. The ball has mass 0.065 kg, the string has radius 1.2 m and assume that the string is massless. What is the maximum tension in the string
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