Question

1.  Which of the following holds true with regards to heat energy?

a. Heat can only be used to change the temperature of a body or the phase of the body.

b. The amount of heat transferred from one body to another is directly proportional to the temperature.

c. Heat is energy transferred from one body to another as a consequence of temperature difference.

d. Heat contained in an object is transferred when it is in physical contain with another object.

2. Ohm’s Law states that

a. current is directly proportional to the resistance

b. voltage is directly proportional to the current.

c. currents are equal in resistors connected in series.

d. voltages are equal in resistors connected in parallel.

3. When you look in a plane/flat mirror (i.e. an ordinary bathroom mirror), your image that you see in the mirror is supposed to be the same size or height as you are. How come when look in the mirror from a few meters away, your image appears smaller than you are?

a. Regardless of the type of mirror, image size will depend on the object's distance from the mirror.

b. Your image is still the same height as you but because it is far from you, it appears smaller because of perspective.

c. The mirror must be broken or damaged in some way.

d. The mirror is not actually a flat mirror but a curved mirror. It is either a concave mirror or convex mirror.

thank you thank you thank you!!!

Answer 1