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It is required to have an electric deposit of copper on the surface of a plate 250 cm2 in area. what thickness of copper will be deposited if one ampere current is allowed to pass through for 100 minute , the density of copper = 8.9 g/cm3 and electro chemical equivalent = 0.0003295
(a) How much energy was dissipated by friction? (b) If the slide is inclined at 20°, what is the coefficient of friction between the girl and the slide?
When a lightning bolt strikes a lightning rod, its current istypically conducted to the ground by a ground rod. When the currentin the rod exceeds 20.0 kA, it can no longer be confined bythe rod and will arc laterally through the air to the ground..
the paths of raindrops during a storm appear to form an angle of 75deg with the vertical and to be directed to the left
the hydrogen atom consists of a proton of mass 1.67 x 10-27 kg and an orbiting electron of mass 9.11 x 10-31 kg. in one
The ideal gas law relates the temperature, pressure and volume of an ideal gas. How many molecules of gas are inside the balloon
The nucleus of an atom consists of protons and neutrons (no electrons). A nucleus of a carbon-12 isotope contains six protons and six neutrons.
Imagine trying to build a portion of a draw bridge as in the following. The side towers reach h=100 meters high above the road level. what is the total tension in the lift wire
A planet moves in a circle around a massive star. If the planet is 7.2 x 1010 m from the star, What is the mass of the star
Find the drift velocity of conduction electrons in a gold wire of diameter 1.03 mm when a current of 0.221 A flows in it. The density of conduction electrons in gold is 5.90 X 10^28 m-3
An ocean wave has period 3.7 s and wavelength 11.2 m. (a) Find its wave number. m^-1 (b) Find its angular frequency. s^-1
A 2.20 H coil with a resistance of 2.18×10^2 ohms is in series with a 1.29×10^3 ohms resistor. What is the peak value of the potential difference across the coil
The Very Large Array (VLA) is a set of 30 dish radio antennas located near Socorro, New Mexico. The dishes are spaced 1.0 km apart and form a Y-shaped pattern, as in the diagram. Radio pulses from a distant pulsar (a quickly rotating neutron star) ar..
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