February 23, 2017

Homework Help: Physical Science

Posted by mysterychicken on Friday, May 22, 2009 at 4:57pm.

Need help-
1.Eva is in a closed dark room. She uses her arm muscles to turn on a lamp. When she moves her hand closer to the lamp, the light heats her hand. The light bounces off the pages of a book and into her eyes. If this room is a closed system, what happens to the total amount of energy in the room?
A.It remains constant. increases decreases increases, then decreases

2.Chen connects several light bulbs in a series circuit. Electricity flows through the circuit, and all the light bulbs light up. What will happen if Chen removes one ligh bulb?
A.The circuit will be closed
B.the other bulbs will stay lit
C.the circuit will become a parallell circuit.
D.the other bulbs will turn off

10.Carrie observes a blue object. Which color(s) of light does this object absorb?
C.all colors except blue
D.all colors


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