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 2Appliances 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 3Discuss what you see viewing a distant street light through a thin curtain (at night).
What will be an ideal response?
Question 4An emf is induced in a wire by changing the current in that wire.
Indicate whether the statement is true or false
Question 5A 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
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