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3 years ago

In order for a person to "see" an object, light waves pass through the ___________.

2 answers:

8 0

I think the correct answer from the choices listed above is the first option. In order for a person to "see" an object, light waves pass through the cornea. The cornea is the transparent layer forming at the front of the eye. Hope this answers the question. Have a nice day.

Marta_Voda [28]3 years ago

3 0

Answer: Cornea

Explanation:

Cornea is a transparent outer surface of the eye. It covers the inner parts of the eye ball. It is the first part of the eye through which the light enters the eye. The refractive power of the cornea bends the incident light rays, in such a way that they pass through the pupil. From pupil the light enters the opening of the iris through which the light enters the eye. The iris is like shutter of a camera. It regulates the amount of light entering the eye.

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Carlos is baking a cake. The last step in the directions is to put the cake batter in the oven. Why does Carlos need to put the

Schach [20]

Answer:

it's d

Explanation:

have you ever baked a cake? Everytime you put cake batter into the oven, it takes a few hours for it to start turning into cake.

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3 years ago

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an aircraft has a liftoff speed of 53 m/s. what is the minimum constant acceleration an airplane must have to reach that takeoff

xxMikexx [17]

Answer:

$a=3.34\ m/s^2$

Explanation:

<u>Accelerated Motion </u>

It refers to the motion of objects in which velocity is not constant over time. If the change of the velocity occurs at the same rate, then we say it's uniformly accelerated. Being $v_o$ = initial speed, $v_f$ = final speed, a= constant acceleration, x= distance traveled

Then, the scalar relation between them is

$v_f^2=v_o^2+2ax$

The aircraft needs to reach a liftoff speed of 53 m/s from rest (assumed) having only 420 meters to do so. We can compute the acceleration by solving for a

$\displaystyle a=\frac{v_f^2-v_0^2}{2x}$

$\displaystyle a=\frac{53^2-0^2}{2(420)}$

$\boxed{a=3.34\ m/s^2}$

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3 years ago

Two positive charges are equal. Which has more electric potential energy?

Xelga [282]

Electrostatic potential energy of a system of charge is given by

$U = \frac{kq_1q_2}{r}$

here we have

$q_1,q_2$ = two charges of different magnitudes

r = distance between charges

so here we can see that electrostatic potential energy will depends upon the product of two charges and inversely depends upon the distance between the two charges

So here we can say that the electrostatic potential energy of two charges will be same and equal to each other

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3 years ago

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Suppose your salary in 2012 is $70,000. Assuming an annual inflation rate of 7%, what salary do you need to earn in 2020 in orde

s2008m [1.1K]

Annual salary(2012) = $70,000

Annual inflation = 7%

Therefore, the salary you need to earn in 2020 in order to have the same purchasing power can be calculated below

$2020-2012=8\text{ years}$ $FV=PV\times(1+r)^n$

where

n = 8

r = 7/100 = 0.07

PV = 70, 000

$\begin{gathered} FV=70,000(1+0.07)^8 \\ FV=70000(1.07)^8 \\ FV\text{ = 70000}\times1.71818617983 \\ FV=120273.032588 \\ FV=\text{ \$}120,273.03 \end{gathered}$

The salary you need to earn in 2020 to have the same purchasing power = $120, 273.03

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