1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AleksandrR [38]
3 years ago
7

A far-sighted person has a near-point of 80 cm. To correct their vision so that they can see objects that are as close as 10 cm

to their eye, what should be the focal length of the prescribed lens? Assume the lens will be 2 cm from the eye.
Physics
1 answer:
bekas [8.4K]3 years ago
3 0

Answer:

f = 8.89 cm

Explanation:

As we know that Far sighted person has near point shifted to 80 cm distance

so he is able to see the object 80 cm

now the distance of lens from eye is 2 cm

and the person want to see the objects at distance 10 cm

so here the image distance from lens is 80 cm and the object distance from lens is 8 cm

now from lens formula we have

\frac{1}{d_i} + \frac{1}{d_0} = \frac{1}{f}

-\frac{1}{80} + \frac{1}{8} = \frac{1}{f}

f = 8.89 cm

You might be interested in
Pls help with all questions dew in 10 minutes!
Artyom0805 [142]
7.Jupiter is the largest planet in our solar system at nearly 11 times the size of Earth and 317 times its mass.

When we look at Jupiter, we're actually seeing the outermost layer of its clouds.

The Great Red Spot is a storm in Jupiter's southern hemisphere with crimson-colored clouds that spin counterclockwise at wind speeds

8. 58,232 km

The second largest planet in the solar system

Surface. As a gas giant, Saturn doesn't have a true surface. The planet is mostly swirling gases and liquids deeper down.

Saturn's rings are thought to be pieces of comets, asteroids or shattered moons that broke up before they reached the planet,

9. Unlike the other planets of the solar system, Uranus is tilted so far that it essentially orbits the sun on its side, with the axis of its spin nearly pointing at the star.

Uranus' atmosphere is mostly hydrogen and helium, with a small amount of methane and traces of water and ammonia.

As an ice giant, Uranus doesn't have a true surface. The planet is mostly swirling fluids. While a spacecraft would have nowhere to land on Uranus, it wouldn't be able to fly through its atmosphere unscathed either. The extreme pressures and temperatures would destroy a metal spacecraft.

10. 24,622 km

Neptune has an average temperature of -353 Fahrenheit (-214 Celsius).

Neptune's atmosphere is made up mostly of hydrogen and helium with just a little bit of methane.

5 0
3 years ago
Explain how astronomers might use spectroscopy to determine the composition and temperature of a star.
Damm [24]

Everything starts from spectroscopy. Astronomers only have concentrated information at wavelengths that are emitted from the stars. What they do with this information is to obtain the frequency range of the stars and through spectroscopes they are responsible for dividing the radiation beams and determining the coincidence with the emission of those same waves, of chemical elements. From these observation techniques it is possible to obtain the composition and according to the color, obtaining characteristics such as temperature. The spectrum of stars consists of dark and bright lines called Fraunhofer lines. This spectrum is compared to the spectrum of different elements to find the composition of the stars. This is possible because the elements emit or absorb only specific wavelengths.

4 0
3 years ago
A truck slows from a velocity of 25 m/s to a stop in 70 m. What was the truck’s acceleration
igomit [66]

v^2-u^2=2 x a x d

25^2-0^2=2 x a x 70

625-0=140 x a

625=140a

a=625/140

a=4.46 m/s^2

im not very sure but i think this is how you do this

4 0
3 years ago
Three bulbs are connected in series to a 4.5 V battery. The second bulb burns out. The
Oksi-84 [34.3K]

Answer:

0v

Explanation:

3 0
3 years ago
Which picture correctly shows the path of the reflected light rays given an object outside the focal point?Select one:a. Ab. Bc.
nignag [31]

We will have that the graph that describes the scenario is given by graph B.

6 0
1 year ago
Other questions:
  • An object of irregular shape has a characteristic length of L = 0.5 m and is maintained at a uniform surface temperature of Ts =
    5·1 answer
  • Why must mine tailings be stored and disposed of carefully
    12·2 answers
  • How much power is expended if you lift a 60 n crate 10 meters in 1 second?
    6·1 answer
  • A caterpillar climbs up a one-meter wall. For every 2 cm it climbs up, it slides down 1 cm. It takes 10 minutes for the caterpil
    11·2 answers
  • A catcher "gives" with a baseball when catching it. If the baseball exerts a force of 475 N on the glove such that the glove is
    14·1 answer
  • 7.
    10·2 answers
  • A monochromatic light passes through a narrow slit and forms a diffraction pattern on a screen behind the slit. As the slit widt
    13·1 answer
  • A researcher collected data on 100 random homes in Wake County. She then created the following histogram of when each home was b
    9·1 answer
  • The towline exerts a force of p = 4 kn at the end of the 20-m-long crane boom. if u = 30, determine the placement x of the hook
    7·1 answer
  • A periodic wave of frequency f and speed v travel what distance in one period?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!