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
Gekata [30.6K]
2 years ago
13

The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination on a

screen 5 ft from a light is 2 foot-candles, find the intensity on a screen 20 ft from the light
Physics
1 answer:
emmasim [6.3K]2 years ago
6 0

The intensity on a screen 20 ft from the light will be 0.125-foot candles.

<h3>What is the distance?</h3>

Distance is a numerical representation of the length between two objects or locations.

The intensity I of light varies inversely as the square of the distance D from the source;

I∝(1/D²)

The ratio of the intensity of the two cases;

\rm \frac{I_1}{I_2} =(\frac{D_2}{D_1} )^2\\\\ \rm \frac{2}{I_2} =(\frac{20}{5} )^2\\\\ \frac{2}{I_2} =4^2 \\\\ I_2= \frac{2}{16} \\\\  I_2= 0.125 \ foot-candles

Hence, the intensity on a screen 20 ft from the light will be 0.125 foot-candles

To learn more about the distance refer to the link;

brainly.com/question/26711747

#SPJ1

You might be interested in
From what does oil form?
Akimi4 [234]
C dinosaurs. Once they break down and get pressurized they turn to oil
6 0
3 years ago
An inkjet printer's speed is measured in ____. select one:
Vladimir [108]
<span>Back in the day, one measured a printer's speed in CPM, which stands for characters per minute. Most of the modern printers that exist today, including the inkjet printer measure their speed in PPM, which is also known as pages per minute.</span>
5 0
3 years ago
HELP PLSSSSSSSSSS<br> lithium has three protons. which model shows a neutral atom of lithium?
wolverine [178]

Answer:

B

Explanation:

the 3 electrons makes it neutral

5 0
3 years ago
Read 2 more answers
Which nucleus completes the following equation?
asambeis [7]

Answer:

D.

Explanation:

8 0
4 years ago
When potential energy is converted into Kinetic energy, some of that kinetic energy is always in the form of
Paraphin [41]

Answer: thermal energy

Explanation: Thermal energy is the conversion of kinetic energy

7 0
3 years ago
Other questions:
  • The liquid electrolyte in the battery typically takes what kind of net charge?
    14·1 answer
  • If two sets of data are correlated, this means that:
    7·2 answers
  • If two different substances, with the same mass (1 gram) absorb the same amount of energy, which of the following can be predict
    10·2 answers
  • The Doppler effect is an effect produced by a moving source of sound or electromagnetic waves due to the relative motion of a so
    13·2 answers
  • In a photoelectric experiment, you shine light onto an electrode and record a current of 25 μA. When you apply +500 mV to the el
    12·1 answer
  • A 15,000 N truck starts from rest and moves down a 15∘ hill with the engine providing a 8,000 N force in the direction of the mo
    13·1 answer
  • Where does fusion occur?
    15·1 answer
  • A 13 kg hanging sculpture is suspended by a 95-cm-long, 5.0 g steel wire. When the wind blows hard, the wire hums at its fundame
    7·2 answers
  • Obtain the zeroes of polynomial
    8·1 answer
  • Joanna claims that a large block of ice will cool a substance more than a small block of ice will at the same temperature. To su
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!