If 2.0 kg of water at 0°C is to be vaporized, how much heat must be added?
A)
1080 cal
B)
1080 kcal
C)
1140 cal
D)
1280 cal
E)
1280 kcal
E
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Describe one observation that would disprove the Ptolemaic model and explain why it would conflict with the model
What will be an ideal response?
A block of mass M slides down a frictionless plane inclined at an angle ? with the horizontal. The normal reaction force exerted by the plane on the block is
A) Mg. B) Mg sin ?. C) Mg cos ?. D) Mg tan ?. E) zero, since the plane is frictionless.
If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of energy through the process of heating was added to it, which of the following quantities would be most helpful to know?
A) initial temperature B) specific heat C) density D) coefficient of linear expansion E) thermal conductivity
Which of the following polyatomic ions has a single minus charge?
a. Acetate b. Sulfate c. Phosphate d. Ammonium