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Calculate the heat-removal factor and the duct flow factor for a collector having an overall heat loss coefficient of 6 W/ (m2.K) constructed of aluminum fins and tubes. Tube to tube center distance is 15 cm; fin and tube thicknesses are 0.05 cm; tube diameter is 1.2 cm; fluid heat transfer coefficient is 1200 W/ (m2.K); and the cover transmittance to solar radiation is 0.9 and is independent of direction. The solar absorbance of the absorber plate is 0.9; the
Collector is 1 m wide and 3 m long; the water flow rate is 0.02 kg/sec. The inlet water temperature is 330 K.
Consider a particle of energy E is incident from the left on a rectangular potential barrier of height and width and on both sides of this barrier at which means that no force act
To determine the acceleration due to gravity using a simple pendulum. Apparatus: Pendulum, meter scale, stand, stop watch, vernier callipers. Procedure: 1. The diameter of the bob
é How many types of breakdown ?
Q. Write any three medical applications of laser. Medical applications (i) In medicine micro surgery has befall possible due to narrow angular spread of the laser beam.
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Q. An aircraft having awing span of 10 m flies at a speed of 720 kmph. If the vertical component of the earth's magnetic field is 3 X 10 -5 T, calculate the emf induced between th
Discuss the Factor affecting limiting current.
Hall effect: While charged particles pass through a tube that has both an electric field & a magnetic field (perpendicular to the electric field) exist in it, only certain vel
Q Give the differences between AF choke and RF choke. Audio - frequency (A.F) chokes Radio frequency (R. F) chokes: or high frequency (H.F) chokes
When throwing a baseball, a force is exerted by the hand on the ball. a. Is this force a contact force or a field force? Contact Force b. Throwing a ball 6 m straight upwa
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