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Suppose you wish to fabricate a uniform wire from 1.80 g of copper. The wire is to have a resistance of R = 0.380 ? and all the copper is to be used.(a) What must be the length of this wire?........... m(b) What must be the diameter of this wire?
Put a 10 V battery with a 10 ? internal resistance in series with a switch: hook this up to a 100 ? resistor in parallel with a 2 H inductor. Find the initial voltage across the inductor when the switch is opened
a 4.6kg sphere made of metal whose density is 3800kg/m^3, is suspended by a cord. What fraction of the volume of the sphere is submerged
The planet Mercury has a mass that is 5.00% of that of Earth, and its gravitational acceleration is gmercury = 3.70 m/s2. a) How long does it take for a rock that is dropped from a height of 2.63 m to hit the ground on Mercury?
question1an automobile having a mass of 1000 kg is driven into a brick wall in a safety test. the bumper behaves like a
An ideal gas at 13.6 °C and a pressure of 1.41 x 105 Pa occupies a volume of 3.90 m3. How many moles of gas are present
A wall consists of 2 layers of material: brick in front of an equal thickness of wood. how does the temperature gradient across the wood compare to the gradient across the brick
The weins displacement law tells us that when an object is heated to incandesence it will If the nail seems to give off a maximum of light in the 630 nm region
A parallel-plate capacitor with circular plates of radius R is being discharged. What is the discharging current
Comet Halley moves about the Sun in an elliptical orbit with its closest approach to the Sun being about d1=0.59 AU, What is its speed when it is furthest away from the sun
Long parallel wires separated by 7.5 cm carry 3.3 Amperes each in opposite directions. What magnetic force per length acts on the wires
(a) compute the absolute pressure at the bottom of a freshwater lake at a point whose depth is 25.5 m. assume the density of the water is 1.00 x10^3 kg/m3 and the air above is at the pressure of 101.3 kPa.
A protostar has a temperature of 3000 K,radius of 2*10^8 km at stage 4. At stage 6, Calculate the star's change in absolute magnitude as it evolves from stage 4 to stage 6
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