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
oee [108]
3 years ago
14

Calculate the light intensity 1.45 m from a light bulb that radiates 100 W equally in all directions.

Physics
1 answer:
ivanzaharov [21]3 years ago
5 0

Answer:

I = 3.785 W/m²

Explanation:

given,

distance from the light, r = 1.45 m

Power of bulb = 100 W

The area is that of a sphere with a radius equal to the distance from the light bulb.

The formula for the area of a sphere of radius 1.45 meters is:

A = 4 π r²

A = 4 x π x 1.45²

A = 26.42 m²

Intensity of the light is equal to

I = \dfrac{P}{A}

I = \dfrac{100}{26.42}

      I = 3.785 W/m²

Intensity of the light at 1.45 m is equal to I = 3.785 W/m²

You might be interested in
The tension in the horizontal cord is 30N. Find the weight of the object.
vazorg [7]
Making a drawing of the system, we will have two forces which are tension and the weight of the object. Balancing the forces present, we do as follows:

T = W
W = 30 N

Therefore, weight is equal to 30 N. Hope this answers the question. Have a nice day. Feel free to ask more questions.
7 0
3 years ago
What is one way to model gravity and magnetism
Oxana [17]

Answer:

Gravity and magnetism are not the same thing. In fact, they are completely separate forces. Gravity is a force that acts between any two objects with mass. ... Magnetism can either pull the two objects together or push them apart, depending on which way the magnets point.

Explanation:

6 0
3 years ago
Read 2 more answers
Which is brighter in our sky, a star with apparent magnitude 2 or a star with apparent magnitude 7?
Lina20 [59]

The star with apparent magnitude 2 is more brighter than 7.

To find the answer, we have to know about apparent magnitude.

<h3>What is apparent magnitude?</h3>
  • 100 times as luminous as a star with an apparent brightness of 7 is a star with a magnitude of 2.
  • The apparent magnitude of bigger stars is always smaller.
  • The brightest star in the night sky is Sirius.
  • The brightness of a star or other celestial object perceived from Earth is measured in apparent magnitude (m).
  • The apparent magnitude of an object is determined by its inherent luminosity, its distance from Earth, and any light extinction brought on by interstellar dust in the path of the observer's line of sight.

Thus, we can conclude that, the star with apparent magnitude 2 is more brighter than 7.

Learn more about the apparent magnitude here:

brainly.com/question/350008

#SPJ4

7 0
1 year ago
Which approach would be the most interested in studying Phineas Gage
viva [34]
Biological because its studies the function of the brain’s lobes
7 0
3 years ago
vaccines are used to prevent disease. they are given to patients as dead or weakened forms of a virus. which disease would most
Anton [14]
Flu,because it has the capacity of better fight influenza and it has no bad side effects and it can be taken easily as nasal spray or in the arm.
6 0
3 years ago
Read 2 more answers
Other questions:
  • The correct name for organisms that are made up of more than one cell is
    10·2 answers
  • On your wedding day, you leave for the church 25 minutes before the ceremony is to begin. The church is 8 miles away. On the way
    8·1 answer
  • Is it true that atmospheric oxygen gas is a pure substance?
    6·1 answer
  • A ball is tossed up in the air. at its peak, it stops before beginning to fall. the ball at its peak has
    13·2 answers
  • ¿Existe relación entre la rapidez para realizar trabajo y la velocidad del cuerpo?
    10·1 answer
  • What do astronomers mean by the big bang?
    6·1 answer
  • Newton's Laws question, please help me:
    10·1 answer
  • Push-and-pull factors contribute to _____.<br> economics<br> politics<br> migration<br> education
    15·1 answer
  • An avant-garde composer wants to use the Doppler effect in his new opera. As the soprano sings, he wants a large bat to fly towa
    14·1 answer
  • You are walking on a moving walkway in the airport. The length of the walkway is 59.1 m. If your velocity relative to the walkwa
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!