A nearsighted person wants to see an apple that is 7 meters away but can only clearly see objects that are at most 62 cm away fr
1 answer:
Answer:
The power of the corrective lenses is 3.162 D.
Explanation:
Given that,
Object distance = 70 cm
Image distance = 62 cm
Distance between eyes and glasses = 2.5 cm
Eyeglasses made of diverging corrective lenses can help her to see the apple clearly
So now ,
Object distance from glass =70-2.5 = 67.5 cm
Image distance from glass = 62-2.5 = 59.5 cm
We need to calculate the focal length
Using formula for focal length
We need to calculate the power of lens
Using formula of power
Negative sign shows the lens is diverging.
Hence, The power of the corrective lenses is 3.162 D.
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First table:
1. For height, we usually use cm. If it is a must to use the conversion to solve for number 1, we can first convert the ft into m then to cm and then convert the in to cm and then add the values.
x
x
then we convert the remaining 2in into cm and add it up:
x
or 
Another way to do this is to convert the ft to in and add it up to the remaining 2 in then convert to cm. The answer would be more or less the same.
2. For weight, we will convert lbs to kg.
x
3. For distance we will convert mi to km.
x
4. The unit mph is miles per hour and we will want to convert that into kph or kilometers per hour. You will use the same method that you did above to get it. We do not need to convert hours anymore, so it will stay as is.
x
5. Now for the next one it is very straightforward because 1V = 1V no matter where you go. So if the given is 220V then that means that the converted value is also 220V.
6. Now to convert Fahrenheit to Celsius, then all you have to do is use the formula given above and fill in what you know.
The given is 70°F
°C =
=
=
=
=
°C
The second table is very easy, all you need to do is convert the values to scientific notation or the other way around. All you need to do is move the decimal till you have a coefficient that is between 1 to 10 and then count how many times you moved the decimal. That will be the number or the exponent of 10.
1. $150,000 = $1.5 x 10^5
If you moved the decimal to the left, the exponent will be positive.
Now the other way around. To convert scientific notation to standard form, just move the decimal the number of places indicated by the exponent of 10. If it is positive, you will move to the right and if it is negative, you will move to the left.
2. 2.59x10^6 = 2,590,000m
Now notice that the next value is less than 1. This means you will be moving the the decimal to the right to make it have a coefficient of 1 to 10. You need to move it 3 times to the right so that means the exponent will be negative.
3. 0.005in = 5.0 x 10^(-3)in
Now do not forget to put in your units. In math or even in science the unit is EXTREMELY IMPORTANT.
Hope this helped you and good luck!
1. For height, we usually use cm. If it is a must to use the conversion to solve for number 1, we can first convert the ft into m then to cm and then convert the in to cm and then add the values.
then we convert the remaining 2in into cm and add it up:
Another way to do this is to convert the ft to in and add it up to the remaining 2 in then convert to cm. The answer would be more or less the same.
2. For weight, we will convert lbs to kg.
3. For distance we will convert mi to km.
4. The unit mph is miles per hour and we will want to convert that into kph or kilometers per hour. You will use the same method that you did above to get it. We do not need to convert hours anymore, so it will stay as is.
5. Now for the next one it is very straightforward because 1V = 1V no matter where you go. So if the given is 220V then that means that the converted value is also 220V.
6. Now to convert Fahrenheit to Celsius, then all you have to do is use the formula given above and fill in what you know.
The given is 70°F
°C =
=
=
=
=
The second table is very easy, all you need to do is convert the values to scientific notation or the other way around. All you need to do is move the decimal till you have a coefficient that is between 1 to 10 and then count how many times you moved the decimal. That will be the number or the exponent of 10.
1. $150,000 = $1.5 x 10^5
If you moved the decimal to the left, the exponent will be positive.
Now the other way around. To convert scientific notation to standard form, just move the decimal the number of places indicated by the exponent of 10. If it is positive, you will move to the right and if it is negative, you will move to the left.
2. 2.59x10^6 = 2,590,000m
Now notice that the next value is less than 1. This means you will be moving the the decimal to the right to make it have a coefficient of 1 to 10. You need to move it 3 times to the right so that means the exponent will be negative.
3. 0.005in = 5.0 x 10^(-3)in
Now do not forget to put in your units. In math or even in science the unit is EXTREMELY IMPORTANT.
Hope this helped you and good luck!
The <em>linear</em> acceleration of collar D when <em>θ = 60°</em> is - 693.867 inches per square second.
<h3>How to determine the angular velocity of a collar</h3>In this question we have a system formed by three elements, the element AB experiments a <em>pure</em> rotation at <em>constant</em> velocity, the element BD has a <em>general plane</em> motion, which is a combination of rotation and traslation, and the ruff experiments a <em>pure</em> translation.
To determine the <em>linear</em> acceleration of the collar (), in inches per square second, we need to determine first all <em>linear</em> and <em>angular</em> velocities (
,
), in inches per second and radians per second, respectively, and later all <em>linear</em> and <em>angular</em> accelerations (
,
), the latter in radians per square second.
By definitions of <em>relative</em> velocity and <em>relative</em> acceleration we build the following two systems of <em>linear</em> equations:
<h3>Velocities</h3> (1)
(2)
(3)
(4)
If we know that ,
,
,
,
and
, then the solution of the systems of linear equations are, respectively:
(1)
(2)
,
(3)
(4)
,
The <em>linear</em> acceleration of collar D when <em>θ = 60°</em> is - 693.867 inches per square second.
The statement is incomplete and figure is missing, complete form is introduced below:
<em>Arm AB has a constant angular velocity of 16 radians per second counterclockwise. At the instant when θ = 60°, determine the acceleration of collar D.</em>
To learn more on kinematics, we kindly invite to check this verified question: brainly.com/question/27126557
