1 2.1.3.4.1.5.1.6
You stand on a bridge above a river and drop a rock into the water below from a height of 35 m.
(Assume no air resistance.)
a. What is the acceleration of the rock as it falls? (2 points)
b. How long does it take to hit the water? (4 points)
c. How much more time would it take if instead of dropping the rock straight down, you threw it
horizontally with a speed of 20 m/s? (4 points)
d. You throw another rock at an angle of 65° above the horizontal with a speed of 20 m/s. What
are the x- and y-components of the rock's speed? (3 points)
1
e How long does it take the rock to reach its maximum height? (2 points)

Acommon technique in analysis of scientific data is normalization. the purpose of normalizing data is to eliminate irrelevant constants that can obscure the salient features of the data. the goal of this experiment is to test the hypothesis that the flux of light decreases as the square of the distance from the source. in this case, the absolute value of the voltage measured by the photometer is irrelevant; only the relative value conveys useful information. suppose that in part 2.2.2 of the experiment, students obtain a signal value of 162 mv at a distance of 4 cm and a value of 86 mv at a distance of 5.7 cm. normalize the students' data to the value obtained at 4 cm. (divide the signal value by 162.) then calculate the theoretically expected (normalized) value at 5.7 cm.

The topics covered by the study of thermodynamics include a. energy changes during heating. b. energy changes during chemical reactions. c. color changes during chemical reactions. d. both (a) and (b)

What is the rapid growth rate of a population after a period of slow growth called? a. exponential growth b. overconsumption c. a point source d. the carrying capacity