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exis [7]
3 years ago
12

Please help :) i would rlly appreciate it :)))

Physics
1 answer:
algol [13]3 years ago
6 0

Answer:

the answer for that is "A"

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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
Andru [333]

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

5 0
3 years ago
An upward moving object must be experiencing (or at least usually does experience) an upward force.
gayaneshka [121]
Gravity pulls objects down to the earth
8 0
3 years ago
A see-saw is balanced on a pivot with two children on it. One child is sitting 1.5 m to the left of the pivot and has a mass of
Lorico [155]

Answer:

Explanation:

Remark

This is a second class lever. It is much more efficient than the fishing pole problem. All distances are measured from the pivot in these kinds of questions.

Givens

d1 = 1.5

d2 = ?

m1 = 50 kg

m2 = 30 kg

The lighter child will have to sit further away from the pivot to make the two conditions equal.

Formula

d1*m1 = d2*m2

1.5*50 = d2 * 30

75 = 30 * d2

75/30 = d2

d2 = 2.5

Remark

Notice that the distance is longer for the lighter child. The fact that these are masses and not forces does not matter, but you should take note of it. There is a difference between masses and forces. See the fishing pole problem.

Answer to the multiple Choice question. No motion on this kind of problem means equal moments. The answer is D

Problem 2

1) The wheels are further apart making B more stable. The wider the distance the wheels are apart, the harder it would be to tip the concrete mixer over

2) The center of gravity is lower. The higher the force is the more chance you have of exerting an external force to tip the mixer over.

7 0
2 years ago
Is telekinesis real??? I really wanna start learning it!
Law Incorporation [45]

Answer:

Highly doubt something that requires great focus and mental strength exists

3 0
3 years ago
Coal and other fossil fuels are considered to be "nonrenewable" sources of energy. How does the use of nonrenewable fuels affect
nignag [31]

Answer: D Although the total energy remains constant, nonrenewable fuels convert chemical energy into forms that are difficult or impossible to use again.

Explanation:

The first law of thermodynamics says that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another.

7 0
3 years ago
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