2 years ago

Whats evidence do scientists use to support the theory of plate tectonics

Physics

1 answer:

myrzilka [38]2 years ago

7 0

Scientists don't use evidence to support theories. Theories are offered to explain evidence.

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A light ray incident on a block of glass makes an incident angle of 50.0° with the normal to the surface. The refracted ray in t

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Answer:

$n_{glass} = 1.65$

Explanation:

As we know that the angle of incidence is given as

$i = 50.0^o$

also we have angle of refraction as

$r = 27.7^o$

now by Snell's law we know that

$n_{air} sin i = n_{glass} sin r$

$1 sin50 = n_{glass} sin 27.7$

now we have

$n_{glass} = \frac{sin 50}{sin 27.7}$

$n_{glass} = 1.65$

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3 years ago

The measurement of 50m east is

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<u>B) mass of pendulum bob</u>

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2 years ago

a body dropped from a height reaches a velocity of 13m/s just before touching the ground. What is the initial height of the ball

SashulF [63]

Hi there!

We can use the following (derived) equation to solve for the final velocity given height:

vf = √2gh

We can rearrange to solve for height:

vf² = 2gh

vf²/2g = h

Plug in the given values (g = 9.81 m/s²)

(13)²/2(9.81) = 8.614 m

We can calculate time using the equation:

vf = vi + at, where:

vi = initial velocity (since dropped from rest, = 0 m/s)

a = acceleration (in this instance, due to gravity)

Plug in values:

13 = at

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2 years ago

Which statement best describes the characteristics of white light? A. White light is composed of a spectrum of many different co

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A white light is, by definition, apparently colorless light, for example ordinary daylight. It contains all the wavelengths of the visible spectrum at equal intensity.

so A.

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3 years ago