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
adoni [48]
3 years ago
7

The illuminance on a surface is 6 lux and the surface is 4 meters from the light source. What is the intensity of the source?

Chemistry
2 answers:
Elza [17]3 years ago
7 0

The correct answer is:

D.  96 candelas


Ghella [55]3 years ago
3 0

Answer: D. 96 candelas

Explanation: Illuminance is defined as the quantity of light incident on a surface per unit of area. It depends on the light’s intensity and its distance from the surface.

E=  illuminance on the surface (in lux)= 6 lux

I =  the intensity of the light from the source (in candelas) = ?

S= distance from the light source to the surface (in meters) = 4 m

E=\frac{I}{S^2}

I=E\times S^2

I=6\times (4)^2=96candela

You might be interested in
Which college classes would a student most likely take to become an oceanographer? Select 4 choices.
Setler [38]

Answer:

marine biology

coastal ecology

astronomy

meteorology

Explanation:

As a college student, to study oceanography one will have to take classes in the field of marine biology, coastal ecology, astronomy and meteorology.

An oceanographer is someone or a professional that studies the ocean in order have more scientific knowledge about them.

Oceanography is a merger of geology, biology, chemistry, physics as it pertains to the ocean.

  • There is no need to study human anatomy to study oceanography.
  • Marine biology and coastal ecology deals with study of life forms in their marine environment.
  • Astronomy and meteorology helps to gain insight about the formation of the ocean and how weather relates to the ocean.
5 0
2 years ago
3.
swat32

Answer:

14.7838

Explanation:

Given that;

A student uses a solution that contains 16 g of water to conduct an experiment and at the end of an hour ; the amount have decreased by 3.5%

The mathematically illustration for this is given as

= 16 g ×  3.5%

= 16 *\frac{3.5}{100}

= 0.56  

After an hour; the amount have decreased by 16 - 0.56

= 15.44

after 2 hours the water decreased by another 4.25%

i.e  15.44 * \frac{ 4.25}{100}

⇒ 0.6562

after two hours , the amount would have decreased by:

= 15.44 - 0.6562

= 14.7838

3 0
3 years ago
Ethanol (C2H5OH) and water (H2O) are both liquids at or near room temperature. When a sample of ethanol is poured into a beaker
BaLLatris [955]

Answer:

a. Are miscible because each can hydrogen bond with the other.

Explanation:

Both ethanol and water are miscible. The reason why they can both mix freely is due to the hydrogen bonds that will form between their molecular structure.

Hydrogen bonds are special dipole-dipole attraction between polar molecules in which hydrogen atoms are directly joined to an electronegative atom.

Ethanol has an hydroxyl group which will bond to form an intermolecular bond with the oxygen and hydrogen on the water molecule. This attraction makes them miscible.

5 0
3 years ago
Identify three additional ways scientists learn about the Earth's interior.
anygoal [31]
The Equator is an imaginary line around the middle of the Earth. It is halfway between the North and South Poles, and divides the Earth into the Northern and Southern Hemispheres. The Equator is the line of 0 degrees latitude. Each parallel measures one degree north or south of the Equator, with 90 degrees north of the Equator and 90 degrees south of the Equator. The latitude of the North Pole is 90 degrees N, and the latitude of the South Pole is 90 degrees S hope this helps
7 0
3 years ago
Which of the following is a half-reaction? A. Zn+CuSO4−> B. 2Cl−−>Cl2+2e− C. H2+1/2O2−>H2O D. −>Cu+ZnSO4
malfutka [58]

Answer:

2Cl——>Cl2+2e-

Explanation:

It shows an electron loss or gain

8 0
2 years ago
Other questions:
  • What two elements of the Linnaean system make up an organisms scientific name
    11·1 answer
  • which of the following parts of a circuit would be considered a load ? Justify your answer by explaining your choices • light •
    15·1 answer
  • __________ is considered to be the greatest solvent in the world because it can dissolve so many substances.
    9·1 answer
  • The major source of aluminum in the world this bauxite (mostly aluminum oxide). It’s thermal decomposition can be represented by
    15·1 answer
  • Which element has properties of both metals and nonmetals?
    14·1 answer
  • If an acid is splashed on your skin, wash at once with
    9·2 answers
  • What are use of ammonical liquor​
    13·1 answer
  • The total number of each element is not changed during a chemical reaction
    6·1 answer
  • Calculate the average time the car took to reach each checkpoint. Record the average time in Table D of your Student Guide. The
    9·2 answers
  • Which statement best describes a chemical property of Iron?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!