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Title: How much heat is needed to raise the temperature of 200 g of lead (c = 0.11 kcal/kg C) by 10 C? ... Post by: Eric8925 on Mar 19, 2018 How much heat is needed to raise the temperature of 200 g of lead (c = 0.11 kcal/kg C) by 10 C?
A) 33.0 cal B) 330 cal C) 2000 cal D) 20 kcal Question 2 Appliances in the USA are designed to work on 110-120 V, whereas appliances in Europe operate on 220-240 V. What would happen if you tried to use a European electric shaver in this country? A) It would probably work as well as it does in Europe, since it is the power rating, not the voltage rating, that matters. B) It would probably work as well as it does in Europe, since it is the current rating, not the voltage rating, that matters. C) It would barely work (or maybe not work at all), since the voltage here is too low to push enough current through the device. D) It would probably overheat and burn up before very long. E) This question cannot be answered without knowing the frequency used in Europe and in the USA, since this is the parameter that matters most in any electrical device that operates on alternating current. Question 3 Discuss what you see viewing a distant street light through a thin curtain (at night). What will be an ideal response? Question 4 An emf is induced in a wire by changing the current in that wire. Indicate whether the statement is true or false Question 5 A 2.0 kg mass moving to the East at a speed of 4.0 m/s collides head-on in an inelastic collision with a stationary 2.0 kg mass. How much kinetic energy is lost during this collision? A) 4.0 J B) 16. J C) 8.0 J D) 2.0 J E) zero Title: How much heat is needed to raise the temperature of 200 g of lead (c = 0.11 kcal/kg C) by 10 C? ... Post by: ddd856 on Mar 19, 2018 Content hidden
Title: How much heat is needed to raise the temperature of 200 g of lead (c = 0.11 kcal/kg C) by 10 C? ... Post by: Eric8925 on Mar 19, 2018 Brilliant
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