Select the correct answer.<br> Which hand is negatively charged?

nika2105 [10]

CR < CY < CB

<h3>Which factors affect the critical angle for a given pair of media?</h3>

The factors which affect the critical angle are

(a) The colour (or wavelength) of light

(b) The temperature

(i) Effect of colour of light: The critical angle for a pair of media is less for the violet light and more for the red light. Thus the critical angle increases with the increase in wavelength of light.

(ii) Effect of temperature: The critical angle increases with increase in temperature because on increasing temperature of medium, its refractive index decreases.

According to the question,

μ 1 sinCR =1

μ 2 sinCY =1

μ 3 sinCB =1

μ 1 > μ 2 and μ 2 > μ 3

⟹μ 1 > μ 2 > μ 3

CR < CY < CB

Thus,

The critical angle increases with the increase in wavelength of light.

Learn more about wavelength of light here:

brainly.com/question/27557868

#SPJ1

7 0

2 years ago

A passenger in the rear seat of a car moving at a steady speed is at rest relative to

Ber [7]

The person is at rest with respect to the car. So the best answer is:

c. the front seat of the car.

6 0

3 years ago

uring the investigation of a traffic accident, police find skid marks 89.9 m long. They determine the coefficient of friction be

aivan3 [116]

Answer:

$V_{0}=29.68m/s$

Explanation:

In order to solve this problem, we must first do a drawing of the situation (see attached picture).

When the brakes of the car were applied, we can see that there was only one horizontal force affecting the vehicle's movement, which was the force of friction. When analyzing the free body diagram we can apply Newton's laws to determine the equations we will use to solve this.

$\sum F_{x}=ma$

so:

-f=ma

we also know that:

$f=N\mu_{k}$

so

$-N\mu_{k}=ma$

we can now solve for the acceleration, so we get:

$a=\frac{-N\mu_{k}}{m}$

we don't know what the normal force is, so we can find it out by analyzing the vertical forces applied to the car:

$\sum F_{y}=0$

so we get:

N-W=0

which means that:

N=W

we also know that:

W=mg

so

N=mg

we can substitute this into the first equation so we get:

$a=\frac{-mg\mu_{k}}{m}$

which simplifies to:

$a=-g\mu_{k}$

we can now substitute the provided data:

$a=(-9.8m/s^{2})(0.5)$

which yields:

$a=-4.9m/s^{2}$

once we got the acceleration, we can use kinematics formulas to solve this, we got the following formula:

$a=\frac{V_{f}^{2}-V_{0}^{2}}{2x}$

we know the final velocity must be zero, since that's where the car got to a stop, so the formula then becomes:

$a=-\frac{V_{0}^{2}}{2x}$

we can now solve for the initial velocity, which yields:

$V_{0}=\sqrt{-2xa}$

so we can now substitute the daa we know, so we get:

$V_{0}=\sqrt{-2(89.9m)(-4.9m/s^{2})}$

so we get:

$V_{0}=29.68m/s$

So from this we know that the velocity of the car must have been of at least 29.68m/s when the brakes were applied.

4 0

4 years ago

Describe a situation in your everyday life where you could use the scientific method. List all the steps of the scientific metho

emmainna [20.7K]

Yes, scientific method can be applied on many everyday activities to get a reasonable solution. Infact normally we are applying this method without having it in our knowledge that we are applying it.

For example: In morning we are going to office and we start the car, but it is not started.You turn the engine again and again but it simply donot works.

Observation (the state of defining a problem):

The car is not started

Hypothesis (A possible solution based on the information we already know):

The car is not started because it might be out of gas or there can be some other technical fault.

Experiment (testing of hypothesis by applying different methods of solving problem):

You get the fuel and put it inside the car but it still donot works and car didnot start. Experiment didnot get solution.

Analyze the results of data and test another hypothesis

You call a technician and he check with the car engine tries and finds out that the engine was out of order and needs repairing.

Draw conclusion:

The engine do not works when it is out of order and it is a cause of a car not being started.

<em>Now the theory and law making part can not be applied on this case but it is a part of scientific method.</em>

Hope it helps!

8 0

4 years ago

An overabundance of ________ is linked to schizophrenia and may be the cause of delusions and hallucinations.

erik [133]

Answer:

Dopamine

Explanation:

schizophrenia is caused by an overactive dopamine system in the brain

3 0

4 years ago

Select the correct answer. Which hand is negatively charged?