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
kvasek [131]
3 years ago
8

Why is it beneficial to perform focal point of a convex lens exercises in a dimly-lit room?

Physics
1 answer:
lions [1.4K]3 years ago
7 0

Explanation:

It is given that,

The object distance from the lens is 10 cm, u = -10 cm

Image is formed at a distance of 40 cm away from the lens, u = 40 cm

The lens formula is : \dfrac{1}{v}-\dfrac{1}{u}=\dfrac{1}{f}, v is image distance

\dfrac{1}{40}-\dfrac{1}{-10}=\dfrac{1}{f}\\\\f=8\ cm

The focal length is 8 cm

Magnification,

m=\dfrac{v}{u}\\\\m=\dfrac{40}{-10}\\\\m=-4

The magnification is negative, it means that the formed image is inverted.

You might be interested in
Two north poles will blank
soldier1979 [14.2K]

Answer:

Be pushed away from each other.

Explanation:

7 0
3 years ago
The ice cap at the North Pole may be 1000 m thick, with a density of 920 kg/m3. Find the pressure at the bottom and the correspo
bija089 [108]
<span>Pice=920kg/m^3 deltaP=PgH=920kg/m^3 X 9.80665m/s^2 X 1000m = 9022118 Pa P=Po + deltaP=101.325 + 9022 = 9123kPa</span>
7 0
2 years ago
a flashlight has a resistance of 2.4 ohms. what voltage is applied by the batteries if the current in the circuit is 2.5A?
Mashcka [7]

E = I R

That means 

        Voltage = (current) x (resistance)

                     =   (2.5 A)  x  (2.4 ohms)

                     =       6 volts .


8 0
3 years ago
Read 2 more answers
A 2-m long string is stretched between two supports with a tension that produces a wave speed equal to vw=50.00m/s. What are the
svetoff [14.1K]

Answer

given,

Length of the string, L = 2 m

speed of the wave , v = 50 m/s

string is stretched between two string

For the waves the nodes must be between the strings

the wavelength  is given by

           \lambda = \dfrac{2L}{n}

where n is the number of antinodes; n = 1,2,3,...

the frequency expression is given by

            f = n\dfrac{v}{2L}

now, wavelength calculation

      n = 1

           \lambda_1 = \dfrac{2\times 2}{1}

                    λ₁ = 4 m

      n = 2

           \lambda_2 = \dfrac{2\times 2}{2}

                   λ₂ = 2 m

      n =3

           \lambda_3 = \dfrac{2\times 2}{3}

                    λ₃ = 1.333 m

now, frequency calculation

      n = 1

            f = n\dfrac{v}{2L}

            f_1 =1\times \dfrac{50}{2\times 2}

                    f₁ = 12.5 Hz

      n = 2

            f = n\dfrac{v}{2L}

            f_2 =2\times \dfrac{50}{2\times 2}

                    f₂= 25 Hz

      n = 3

            f = n\dfrac{v}{2L}

            f_3 =3\times \dfrac{50}{2\times 2}

                    f₃ = 37.5 Hz

8 0
3 years ago
Describe Kinetic Energy.​
mina [271]
In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest.

4 0
3 years ago
Other questions:
  • a book is sitting still on your desk. are the forces acting on the book balanced or unbalanced? explain.
    5·2 answers
  • Humans first appeared during the _____.
    8·2 answers
  • Please solve for me am confused​
    10·1 answer
  • a swimmer can swim in still water at a speed of 9.50 m/s. he intends to swim directly across the river that has a downstream cur
    12·2 answers
  • Which value is equivalent to 7.2 kilograms?
    8·2 answers
  • The position of a particle moving along the x axis varies in time according to the expression x = 4t 2, where x is in meters and
    15·2 answers
  • work done as mass 1 moves to mass 2. the gravitational force between two point masses separated by a distance r is proportional
    7·1 answer
  • Which of the following describes electric change?
    14·2 answers
  • A ball is thrown directly upwards. Is there a point of trajectory where the ball has zero acceleration
    6·1 answer
  • Please indicate how long each bar is in centimeters and millimeters.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!