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A glass mirror used in a mountaintop telescope is subject to temperatures ranging from -15°C to 45°C.
At the lowest temperature, it has a diameter of 5.1 m.
If the coefficient of linear expansion for this glass is 3.0 x 10-6°C-1.
What is the maximum alter in diameter the mirror undergoes because of thermal expansion?
A mild steel closed magnetic circuit has a mean length of 75mm and a cross-sectional area of 320.2mm 2 . A current of 0.40 a flows in a coil wound uniformly around the circuit
a report on electrostatic shielding
what is friction force? why does opposes the motion?
A thin layer of an incompressible fluid flows steadily over a horizontal smooth plate as shown in the figure. The fluid surface is open to the atmosphere, and an obstruction having
Tardon A particle that has a positive real mass & travels at a speed less than c within all inertial frames.
IN SUCCESSIVE DISINTEGRATION WHY DOUGHTER ELEMENT NOT DECAY WHEN IT FORM BUT DECAY AFTER A FIEW TIME FROM ITS FORMATION
Can fiber be made any size? Well theoretically, yes. However, there are physical constraints due tothe materials and utility. Extremely large fibers have proportional bending r
The threshold of hearing is 10 -12 watts/m 2 or 0 dB. How many times more intense than the threshold of hearing is 70dB and what is the actual intensity (in watts/m 2 ) at the 7
An atom in a solid state has no degrees of freedom for transnational and rotational speed. At great temperatures due to vibration along 3 axes it has 3 Χ2(directions) = 6 degrees
Find the electric field between the plates of a capacitor given the following:? (1) C= 10pF (2) the capacitor is connected to a 25 V battery (3) there is a vacuum between the capa
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