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2 years ago

What are 2 important statements about physical properties?

Physics

1 answer:

Scilla [17]2 years ago

7 0

Physical properties do not change the chemical nature of matter.
They are things you can observe and touch.

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Calculate the index of refraction for a medium in which the speed of light is 2.1x 108 m/s. The speed of light in vacuum is 3x10

strojnjashka [21]

Answer:

n = 1.42

Explanation:

The refractive index for a medium is given by the ratio of the speed of light in vacuum to the speed of light in a medium.

$n=\dfrac{c}{v}\\\\n=\dfrac{3\times 10^8}{2.1\times 10^8}\\\\n = 1.42$

So, the refractive index of the medium is 1.42.

5 0

3 years ago

What is the main difference between a longitudinal wave and a transverse wave? a longitudinal wave travels faster than a transve

mote1985 [20]

The motion of the medium is parallel to a longitudinal wave
and perpendicular to a transverse wave.

9 0

3 years ago

Read 2 more answers

Which of the following is a good scientific question? A. Are dragons lizards or birds? B. How do star fish fall in love? C. Does

Wittaler [7]

C. Does eating less fat increase a mouse's lifespan?
(If a mouse eats less fat in its meals then will it live longer: compared to other mice lives.

This is a testable question that can be answered by designing and conducting an experiment.

I think D could be correct as well.

My final answer is D.

6 0

3 years ago

Read 2 more answers

1. A large ball was let go on a hill and started rolling down with a constant acceleration of 4.2 m/s². What was the velocity of

pochemuha

Answer:

The velocity after 12s is 50.4m/s.

Explanation:

In acceleration formula make velocity the subject.

acceleration(a) = velocity(v)÷time(t)

<h3> velocity (v) = acceleration(a)×time(t)</h3>

V = 4.2m/s²×12s

V = 50.4m/s

Therefore the velocity after 12s is 50.4m/s.

8 0

1 year ago

In a double slit experiment, 450 nm light passes through two slits producing an interference pattern where the first bright frin

musickatia [10]

Answer:

1.3 x 10⁻⁴ m

Explanation:

$\lambda$ = wavelength of the light = 450 nm = 450 x 10⁻⁹ m

n = order of the bright fringe = 1

θ = angle = 0.2°

d = separation between the slits

For bright fringe, Using the equation

d Sinθ = n $\lambda$

Inserting the values

d Sin0.2° = (1) (450 x 10⁻⁹)

d (0.003491) = (450 x 10⁻⁹)

d = 1.3 x 10⁻⁴ m

6 0

2 years ago