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A copper rod 81 cm long is used to poke a fire. The hot end of therod is maintained at 105° C and the cool end has a constanttemperature of 24° C. What is the temperature in degrees Celsius of the rod 23 cm from the cool end?
A fish is 2 m below the surface of a smooth lake. What is the diameter of circle on the surface through which the fish can see the world outside the water
At Earth location, the intensity of sunlight is 1.5 kW/m2. by how much would Earth's mass increase in 1 day
The primary coil of a transformer has 237 turns; secondary coil has 2100 turns. An alternating current is sent through the primary coil. The emf in the primary is 25 V. What is the emf amplitude in secondary.
q1. in a skating stunt called as cracking-the-whip a number of skaters hold hands and form a straight line. they try to
A large truck collides head-on with a small car. The car is severely damaged as a result of the collision. According to Newton's third law, how do the forces acting between the truck and car compare during the collision?
A circuit consists of a battery connected to three resistors (65?, 26?, and 170?) in parallel. find the current through each resistor
A cylindrical glass of water (H2O) has a radius of 4.61 cm and a height of 12.5 cm. How many moles of water molecules are contained in the glass
A 19-kg chandelier is suspended from the ceiling by four vertical steel wires. Each wire has an unloaded length of 4 m and a diameter of 7 mm
An 800-N billboard worker stands on a 4.0-m scaffold supported byvertical ropes at each end. what is the tension in the ropenearest the worker
A meterstick (L = 1 m) has a mass of m = 0.217 kg. Initially it hangs from two short strings: one at the 25 cm mark and one at the 75 cm mark. Where is the angular acceleration of the meterstick a maximum
Earth's radius is 6.38 × 106 m, and it completes one revolution every day. What is the tangential speed of a person standing on the equator
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.19 x 104 m/s, What is the orbital speed of the second satellite
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