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Two copper wires have equal cross- sectionel area and length of 2.0m and 0.50m respectively.
(a) What is the ratio of the current in the shorter wire to that in the longer wire if they are connected to the same power supply?
(b) If you wanted the two wire to carry the same current, what would the ratio of their cross - sectional areas has to be?(Give your answer as a ratio of longer to shorter)
A 150 g copper bowl contains 220 g of water, both at 200 degrees Celsius. Avery hot 300 g of copper cylinder is dropped into the water, causing the water to boil, with 5.00 g being converted to steam the final temperature of the system is loo degrees..
The coefficient of friction between the 3.00 kg block and the surface is 0.400. The system starts from rest. Find the speed of the 5.00 kilogram ball when it has fallen 1.50 meter
A 2.5 kOHM and a .5kOHM resistor are connected in parallel; this combination is connected in series with a .583kOHM resistor. find the maximum voltage that can be applied by the battery
Four point charges have the same magnitude of 2.53 x 10^-12 C and are fixed to the corners of a square that is 4.15 cm on a side. Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists ..
A cryogenic storage container holds liquid helium, which boils at 4.2 K. Suppose a student painted the outer shell of the container black, Determine the rate of heat loss due to radiation
A freezer is used to freeze 3.0 Lof water completely into ice. The water and the freezer remain at aconstant temperature of T = 0°C. Determine the change in the entropy of the water
Knowing that these two tones are two harmonics apart, find the smallest length the tunnel could have. Also determine the harmonic number for these two tones
Four point charges have the same magnitude of 2.57 10-12 C and are fixed to the corners of a square that is 4.20 cm on a side. Determine the magnitude of the net electric field that exists at the center of the square
A car moves from a point located 26.0 m from the origin and at an angle of 35.0 from the x-axis to the point located 57.0 m from the origin and at an angle of 60.0 from the x-axis in 2.52 s.
A plastic bucket with negligible mass and specific heat holds 2 kg of water at temperature 20c. Find the entropy change of the ice as it cools and freezes into ice
demonstrate that the ground state wave function of a particle in an infinitely deep box is an eigenfunction of the
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. find the period of a satellite in a geosynchronous orbit
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