Two people are talking at a distance of 3.0 m from where you are, and you measure the sound intensity as 1.1 × 10-7 W/m2. Another student is 4.0 m away from the talkers
Calculate a reasonable estimate for the sound intensity that the other student measures. A) 6.2 × 10-8 W/m2
B) 1.5 × 10-7 W/m2
C) 8.3 × 10-8 W/m2
D) 7.8 × 10-7 W/m2
E) 2.5 × 10-8 W/m2
A
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a.
7.5 ?F
b.
6.5 ?F
c.
7.0 ?F
d.
5.8 ?F
e.
13 ?F
A 40.0-kg box is being pushed along a horizontal, smooth surface. The pushing force is 15.0 N directed at an angle of 15.0° below the horizontal. What is the acceleration of the crate?
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An example of igneous rock is
a. marble. b. shale. c. slate. d. granite.
The position of an object is given by where and x and t are in SI units. What is the instantaneous acceleration of the object when
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