13.3.2 Test (CST): Force und Motion Question 7 of 8
Which diagram describes an object moving at a constant speed?
Distance versus Time
300
250
200
O A
Distance (km)
150
100
50
24
Time (h)
Velocity versus Time
o
Velocity (mph)
12
3 4 5 6 7
Time
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Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.