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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?
The mass of an atom is constituted mainly by: (1) Neutron and neutrino (2) Neutron and electron (3) Neutron and proton (4) Proton and electr
The voltage drops across two components when connected in series across an a.c. supply are v1 =150sin 314.2t and v2 =90sin(314.2t -∏/5) volts respectively. Determine (a) the v
The current in a coil changes of 5A to 10A in 10 -2 s. Then an emf of 50 mill volts is induced in a coil neat it. Determine the mutual inductance of the coil.
conclution about friction is a necessary evil
Q. While rummaging in her backpack for her cell phone, Sally's Mini-Cooper rear ends Joey's Suburban. Sally's car is totaled while the suburban is fine. If Sally's car hit the sub
A spectrometer is required for creating pure spectrum of a source in laboratory and measuring of ? of material of prism and ? of a transparent liquid. It has of three parts: Col
A cyclotron with dee radius 45.9 cm is operated at an oscillator frequency of 12.9 MHz to accelerate protons. (a) What magnitude B of magnetic field is required to achieve resonanc
Define the terms threshold frequency and stopping potential in relation to the phenomenon of photoelectric effect. How is the photoelectric current affected on enhancing the (i)
As the temperature of the air enhances from 0 degrees C to 20 degrees C, the wavelength of a sound made by a tuning fork of fixed frequency does which of the following? Does th
It uses in electric cooling devices, turbines ...........etc
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