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
VMariaS [17]
3 years ago
5

When calculating power what two pieces of information are needed?

Physics
1 answer:
velikii [3]3 years ago
6 0
It should be D work and time because power = work / time
You might be interested in
4 points
zubka84 [21]

(a) 25lx

(b) 11.11lx

<u>Explanation:</u>

Illuminance is inversely proportional to the square of the distance.

So,

I = k\frac{1}{r^2}

where, k is a constant

So,

(a)

If I = 100lx and r₂ = 2r Then,

I_2 = k\frac{1}{(2r)^2}

Dividing both the equation we get

\frac{I_1}{I_2} = \frac{k}{r^2} X\frac{(2r)^2}{k} \\\\\frac{I_1}{I_2} = 4\\\\I_2 = \frac{I_1}{4}\\\\I_2 = \frac{100}{4}  = 25lx

When the distance is doubled then the illumination reduces by one- fourth and becomes 25lx

(b)

If I = 100lx and r₂ = 3r Then,

I_2 = k\frac{1}{(3r)^2}

Dividing equation 1 and 3 we get

\frac{I_1}{I_2} = \frac{k}{r^2} X\frac{(3r)^2}{k} \\\\\frac{I_1}{I_2} = 9\\\\I_2 = \frac{I_1}{9}\\\\I_2 = \frac{100}{9}  = 11.11lx

When the distance is tripled then the illumination reduces by one- ninth and becomes 11.11lx

3 0
3 years ago
English or metric <br> What is 16in to cm
il63 [147K]
40.64 cm is the answer to your question.
6 0
3 years ago
Given a force of 88N and an acceleration of 4m/s2 what is the mass
anygoal [31]
Use newtons second law F=ma, plug in the given values which gives us the answer of 22 kg for the mass
6 0
3 years ago
What are 3 ways acceleration can change?
Karolina [17]

Velocity, direction, or both at the same time.

3 0
3 years ago
Similar fossiles found all over the world true or false?
sergij07 [2.7K]

Answer:

yes

Explanation:

pangea moved dinosouars and other spices all aroud the world. just like how you can find the same types of birds in some places with very few differsencs  

7 0
3 years ago
Other questions:
  • The average speed of a snail is 0.020 miles/hour and that of a Leopard is 70 miles/hour. Convert these speeds in SI units. ​
    8·1 answer
  • An engineer is adding a heat sink to a motor to help absorb some of the heat produced by the motor. Which piece of metal would a
    11·2 answers
  • Best answer gets brainliest!!!!
    9·2 answers
  • Which circuit-A or B-represents a series circuit? Explain your answer.
    5·1 answer
  • What are some ways living things can be grouped
    10·1 answer
  • A plane progressive
    12·1 answer
  • Why are many scientists concerned about humans adding large amounts of carbon to the atmosphere by burning fossil fuels (combust
    5·2 answers
  • What type of image is formed by the following mirror?
    10·1 answer
  • There are pros and cons to both e-readers and paper books. Do you think the pros outweigh the cons more for modern electronic re
    12·1 answer
  • A boat is stationary at 12 meters away from a dock. The boat then begins to move toward the dock with
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!