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
cestrela7 [59]
3 years ago
10

You have two lens A and B of focal length +50cm and -50cm respectively. The nature and power of the lenses respectively isa. Con

cave, -2 D ; Convex, +2 D b. Convex, +2 D; Concave, - 2 D
Physics
1 answer:
Gre4nikov [31]3 years ago
8 0

Answer:

Concave, +2D

Convex -2D

Explanation:

Power of a lens is the reciprocal of its focal length.

For lens of +50cm = 0.5m

Power of the lens = 1/0.5

Power of the lens = +2Dioptres

Since the focal length is positive, the lens is concave

For the lens of -50cm = -0.5m

Power = 1/-0.5

Power = -2D dioptres

Since the focal length is negative, the lens is convex

You might be interested in
A student walks 3 north and 4 m west. The magnitude of the resultant displacement for the student is
evablogger [386]

Answer:

5m

Explanation:

Using Pythagoras theorem,

a^2+ b^2=c^2

3^2+4^2=c^2

25=c^2

√(25)=c

5m=c

6 0
3 years ago
When current first leaves the battery, how much voltage does it have
rjkz [21]

Answer:

depends on the voltage of battery

Explanation:

for example if you connect a battery of 6V,6V will be  provided

8 0
2 years ago
What is the complete back-and-forth motion of an object called?
Lena [83]
<span>Vibration is the Answer</span>
5 0
3 years ago
Preston tossed a red ball upward and it reaches a maximum height of 3.0. What is the final velocity when it returns to prestons
Leokris [45]
That will depend on the units of the 3.0. We need to know if it's 3 feet, 3 yards, 3 meters, or 3 miles. Each one will have a different answer.
5 0
3 years ago
Ask Your Teacher In the air over a particular region at an altitude of 500 m above the ground, the electric field is 120 N/C dir
strojnjashka [21]

Answer:

1.475\times 10^{-13}\ C/m^3

Explanation:

\epsilon_0 = Permittivity of free space = 8.85\times 10^{-12}\ F/m

A = Area

h = Altitude = 600 m

Electric flux through the top would be

-110A (negative as the electric field is going into the volume)

At the bottom

120A

Total flux through the volume

\phi=120-110\\\Rightarrow \phi=10A

Electric flux is given by

\phi=\dfrac{q}{\epsilon_0}\\\Rightarrow q=\phi\epsilon_0\\\Rightarrow q=10A\epsilon_0

Charge per volume is given by

\rho=\dfrac{q}{v}\\\Rightarrow \rho=\dfrac{10A\epsilon_0}{Ah}\\\Rightarrow \rho=dfrac{10\epsilon_0}{h}\\\Rightarrow \rho=\dfrac{10\times 8.85\times 10^{-12}}{600}\\\Rightarrow \rho=1.475\times 10^{-13}\ C/m^3

The volume charge density is 1.475\times 10^{-13}\ C/m^3

7 0
3 years ago
Other questions:
  • Why are conductors and insulators both required to construct the electrical wiring in our home
    11·1 answer
  • If you cut a pill in half will it have less of how much it has to help you or the same amount?
    6·2 answers
  • A rocket, weighing 4.36 x 10^4 N, has an engine that provides an upward force of 8.90 x 10^5 N. It reaches a maximum speed of 86
    6·1 answer
  • There is a large box and a small box on a table. The same force is applied to both boxes. The large box moves two feet and the s
    8·2 answers
  • An optimistic outlook is related to:
    5·2 answers
  • A train crew was cleaning out a rail tanker that had been emptied of its contents. They rinsed the rail car out with scalding ho
    9·1 answer
  • What is the wavelength of a sound wave with a frequency of 50 hz? (speed of sound is 342 m/s)?
    5·1 answer
  • Based on what you know about how light travels, explain why
    13·2 answers
  • URGENT<br><br>__ mass is the measurement of fat on the body. Fat or lean
    7·1 answer
  • A police officer uses a radar gun to determine the speed of a car. A specialized radar gun uses ultraviolet light to determine t
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!