3 years ago

FREE BRAINLEIAST FOR FIRST GOGOGOGO!!!!heererer

Physics

1 answer:

Kamila [148]3 years ago

6 0

Answer:

ME PLS

Explanation:

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Kyle lays a mirror flat on the floor and aims a laser at the mirror. The laser beam reflects off the mirror and strikes an adjac

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Answer:

The angle of incidence is $\theta_i =42.6^o$

Explanation:

The diagram for this question is shown on the first uploaded image

From the question we are told that

The distance between the mirror and the wall is $a = 33.7 cm$

The height of the above the mirror is $b = 36.7 cm$

Generally the angle which the reflected ray make with the mirror is mathematically evaluated as

$\alpha =tan ^{-1} (\frac{b}{a})$

substituting values

$\alpha = tan ^{-1}( \frac{36.7}{33.7})$

$\alpha =47.4^o$

From the diagram we can deduce that the angle of incidence is

$\theta_i = 90 - \alpha$

So $\theta_i = 90 - 47.4$

$\theta_i =42.6^o$

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3 years ago

A 1.00- and a 2.00- resistor are in parallel. What is the equivalent single resistance?

pochemuha

Answer: R=2/3 ohms

Explanation:

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3 years ago

______ are used when drawing circuit diagrams

snow_lady [41]

It is symbols to make it easier and to save space!

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3 years ago

An athlete stretches a spring an extra 40.0 cm beyond its initial length. How much energy has he transferred to the spring, if t

notsponge [240]

Answer:

Explanation:

Step one:

given data

extension= 40cm

Spring constant K= 52.9N/cm

Step two:

Required

the Kinetic Energy KE

the expression to find the kinetic energy is

KE= 1/2ke^2

substituting our data we have

KE= 1/2*52.9*40^2

KE=0.5*52.9*1600

KE= 42320Joules

<u>The answer is b) 4230 J </u>

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The answer is 10%. just took the test. hope it helps!!

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