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An aluminum rod has a resistance of 1.234 4 at 20.0°C. The rod is cooled down to 20 C. And at that temperature it is stretched to twice its length at 20C. Find the new value of the resistance of the rod.
One liter of water is 41C is used to make iced tea. How much ice at 0 C must be added to lower the temperature of the tea to 17C? The specific heat of water is 1 cal/g C and latent heat of ice is 79.7 cal/g. Reply in units of g.
James Stewart, 2002 Motocross/Supercross Rookie of the Year, is leading a race when he runs out of gas near the finish line. Determine the distance the racer travels before coming to a stop
A laser pulse has an energy of 25 J and a beam radius of 2 mm. The pulse duration is 6 ns and the energy density is constant within the pulse. What is the spatial length of the pulse
A proton and an alpha particle (q = +2e, m = 4 u) are fired directly toward each other from far away, each with an initial speed of 0.012c. What is their distance of closest approach
A particular satellite was placed in a circular orbit about 145 mi above Earth. Determine the time required for one complete revolution
A thin rod of length 8.5 m and mass 23 kg is supported at a 37? incline. One support is 2.1 m, Find the normal force exerted on the rod by the upper support
The flashes from the explosions as observed by Spud?
A solar cell generates a potential difference of 0.094 V when a 560 ? resistor is connected across it, and a potential difference of 0.14 V when a 1100 ? resistor is substituted. What are the emf of the solar cell
A spring is hung from the ceiling. A 0.463 -kg block is then attached to the free end of the spring.Find the angular frequency of the block's vibrations
If an electroscope is charged by induction
A particle state is represented by the following wave function
Two cars, A and B, travel in a straight line. The distance of A from the starting point is given as a function of time by XA (t)=at+Bt^2, Which car is ahead just after they leave the starting point
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