Rank the following kinds of waves according to their speeds from fastest to slowest:

(a) gamma rays
(b) microwaves
(c) radio waves
(d) visible light
(e) x-rays


1.c > b > d > e > a
2.b > c > e > b > a
3.a > e > d > b > c
4.e = a = c = d = b


4

Physics & Space Science

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A boat has an initial velocity of 2 m/s in the y direction on a stream which is moving in the x direction at 1 m/s. The boat is accelerating in its direction of motion at 1 m/s2. What is the acceleration of the boat (in m/s2) relative to the water?

A.

1

B.
2

C.
3

D.
3? 

E.
1

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What will be an ideal response?

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Consider a very small hole in the bottom of a tank 20.0 cm in diameter filled with water to a height of 50.0 cm. Find the speed at which the water exits the tank through the hole

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A stonecutter's chisel has an edge area of 0.50 cm2 . If the chisel is struck with a force of 45.0 N, what is the pressure exerted on the stone?

a. 9.0E+2 Pa b. 9.0E+3 Pa c. 9.0E+4 Pa d. 9.0E+5 Pa e. 4.5E+5 Pa

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