# Physics

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Solution Library **

#### Calculate The Velocity Of An Object

Question A toy truck, with mass 20.0 g, travels along a level tabletop at 0.50 m/s. A miniature car, with mass 5.00 g, speeds headlong toward the toy truck at 0.75 m/s. Immediately after the collision, the toy truck continues in its original direction at 0.10 m/s. What is the velocity of the miniat ... Read More

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#### Calculate The Speed Of A Frictionless Rollercoaster

Question A 1500kg roller coaster is at the top of a track and is travelling forward with a velocity of 1.0 m/s. It then goes down the track a distance along the track of 50m. The track is inclined at 50 degrees to the horizontal. (a) If the track is frictionless, calculate the speed of the rolle ... Read More

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#### Find the Thermal Conductivity of a plate which is infinitely long horizontally

Question A plate of thickness t is subjected to the imposed surface flux q," on its top surface with a pitch of 2L as shown in the figure. The plate is infinitely long in the horizontal direction. The in-depth width of the plate is w. The thermal conductivity of the plate is k. The unheated area o ... Read More

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#### Calculate the Chemical Energy of a Car Battery

Question How many years/days/hours can a 12V car battery supply a 250A to a starter motor if the battery has 2TJ of chemical energy that can be converted to electric energy?Summary The question belongs to Physics and it is about the life of a 12V car battery supplying 250A with 2TJ of chemical ene ... Read More

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#### Calculate the Current Drawn by a DC Motor with an Efficiency of 80%

Question Find the current drawn from 110V line by a DC electric motor that delivers 800W with an efficiency of 80%.Summary The question belongs to Physics and it is about the current drawn by a dc motor running at 800W with an efficiency of 80%. The solution has the detailed calculation. ... Read More

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#### Calculate the Resistance of Annealed Copper Wire

Question What is the resistance of an annealed copper wire that has a length of 500m and a diameter of 0.5 mm? How a diameter two times smaller affects the resistance.Summary The question belongs to Physics and it is about calculating the resistance of an annealed copper wire of length 500m and a ... Read More

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