Sound waves in air are transverse waves
Indicate whether the statement is true or false
FALSE
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Diagram 6-2 illustrates a light source, a gas cloud, and three different lines of sight. Along which line of sight would an observer see a continuous spectrum?
a.
1
b.
2
c.
3
d.
2 and 3
e.
none of them
You push on a block on frictionless ice with a force of 8 N, causing it to accelerate at 2 m/s2 . The mass of the block is
a. 2 kg b. 4 kg c. 8 kg d. 16 kg e. 6 kg
In brittle ceramics, the fracture strength is lower than the _________strength.
Fill in the blank(s) with the appropriate word(s).
An object is placed a distance d in front of a plane mirror. The size of the image will be
A) dependent on the distance d. B) half as big as the size of the object. C) twice the size of the object. D) dependent on where you are positioned when you look at the image. E) the same size as the object, independent of the distance d or the position of the observer.