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3 years ago

8

Which statement best describes how light waves travel in a uniform medium. A. in straight lines. . B. in extending circles. . C.

in bent lines. . D. in shrinking ripples

2 answers:

Tanya [424]3 years ago

6 0

Light waves travel in straight lines when they are travelling in a uniform medium. This is because the waves are travelling at the same speed.

g100num [7]3 years ago

6 0

The answer is a. Straight lines

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9. Suppose you ride your Segway to the library traveling at 0.5 km/min. It takes you 25

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Answer:

12.5 km

Explanation:

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3 years ago

Jogging on hard surfaces with insufficiently padded shoes produces large forces in the feet and legs.

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Answer:

Part a)

$F = 15600 N$

Part b)

force is 21.2 times more than the weight of the person

Explanation:

Part a)

As it is given that the distance after which he stopped is given as

d = 1.50 cm

here finally it stops so final speed is given as

$v_f = 0$

initial speed is given as

$v_i = 6 m/s$

now by the equation of kinematics we know that

$v_f^2 - v_i^2 = 2a d$

$0^2 - 6^2 = 2(a)(0.015)$

$a = -1200 m/s^2$

Now the force on the leg is given as

$F = ma$

m = mass of leg = 13 kg

$F = (13 kg)(-1200 m/s^2)$

$F = 15600 N$

Part b)

Force due to weight of the object

$F_g = Mg$

here we know

M = 75.0 kg

$F_g = 75(9.81)$

$F_g = 735.75 N$

Now we know that the ratio of the weight with the force on leg is given as

$\frac{F}{F_g} = \frac{15600}{735.75} = 21.2 N$

so force is 21.2 times more than the weight of the person

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3 years ago

Waves that move the particles of the medium parallel to the direction in which the waves are traveling are called?

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<span>Longitudinal Waves is the correct answer</span>

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3 years ago