if we're interested in knowing the rate at which light energy is received by a unit of area on a particular surface we're really trying to figure out the

Answers

Answer 1

Answer: illuminance of a surface

Related Questions

A 20600 kg sailboat experiences an eastward force 17700 N due to the tide pushing its hullwhile the wind pushes the sails with a force of 60000 N directed toward the northwest (45◦ westward of North or 45◦ northward of West). What is the magnitude of the resultant acceleration of the sailboat?
Cutting of a cloth is a physical change, though it cannot be reversed. A) True. B) False.
A center-seeking force related to acceleration is _______ force.A. centripetal B. centrifugal C. gravitational D. frictional
What is the relationship among amplitude,crest,and trough?
400J of heat is produced in 4 sec in 4ohm resistor.calculate yhe PD across the resistor.

Please help ASAP!! According to the condensation theory, the most important factor for the formation of our planets was _____.
A.) the gravitational pull of the Sun
B.) the interstellar dust attracting heat away from the protosun
C.) the process of nuclear fusion
D.) the nebular cloud condensing

Answers

A.. The gravitational pull of the sun

A bowling ball has a mass of 6 kg. What happens to its momentum when its speed increases from 2 m/s to 4 m/s? A) The initial momentum is 6 kg*m/s, and the final momentum is 3 kg*m/s
B) The initial momentum is 12 kg*m/s, and the final momentum is 24 kg*m/s
C) The initial momentum is 12 kg*m/s, and the final momentum is 3 kg*m/s
D) The inital momentum is 6 kg*m/s, and the final momentum is 12 kg*m/s

Answers

Answer:

B) The initial momentum is 12 kg*m/s, and the final momentum is 24 kg*m/s

Explanation:

The momentum of an object is given by the product between its mass (m) and its velocity (v):

$p=mv$

Let's apply this formula to calculate the initial momentum and final momentum of the ball:

- initial momentum:

$p_i = m v_i = (6 kg)(2 m/s)=12 kg m/s$

- Final momentum:

$p_f = m v_f = (6 kg)(4 m/s)=24 kg m/s$

So, the correct answer is

B) The initial momentum is 12 kg*m/s, and the final momentum is 24 kg*m/s

Momentum = (mass) x (speed)

Choice-B is the correct one.

Type of energy does a running refrigerator motor

Answers

Kinetic Energy..........
Hope it helped u!

kinetic energy is the only energy they run on

If The dimensions of a brick that weighs 25N are 0.19m x 0.07m x 0.095m. What pressure does the brick exert on the ground if it is resting on its largest face?

Answers

1 newton per square meter = 1 pascal of pressure.

The largest face of the brick is (0.19 x 0.095) = .01805 square meter

25N/0.01805 = 1,385 newtons per square meter = 1,385 pascal = 1.385 kPa

Karissa is conducting an experiment on the amount of salt that dissolves in water at different temperatures. She repeats her tests several times using the same procedure.What can Karissa do to further increase confidence in the results of her experiment?

have another scientist run the same exact procedure in her lab
include several other liquids for comparison
calculate the average amount of salt that dissolves to summarize findings
make sure the experiment follows a specific procedure that allows other scientists to produce the same findings

Answers

Answer:

C.) Calculate the average amount of salt that dissolves to summarize findings

Explanation:

Just telling you, nobody reads these things. They just look at the answer and say oh i got it right now but you should bc i got a 50 on this quiz and this was one of them that was right so believe me when i say, i got this question right. UwU <333333333

Answer:

Calculate the average amount of salt that dissolves to summarize finding

-The third choice/ C-

Have a good day :)

If a train is 100 km away, how much sooner would you hear the train coming by listening to the rails (iron) as opposed to listening for it standing by the track? In other words, how much faster will the sound travel through the iron rails than through the air? Assume the air temperature is 0°C.Sound will reach you ______ seconds sooner.

302

324

280

Answers

Wellll . . . it's doubtful that you'd hear the sound of a train
from 100 km away (about 62 miles), but this is a fun problem
so let's go through it just for the math.

Online, I looked up the speed of sound in various materials.
Here's what I found:

-- Speed of sound in normal air . . . . . 343 m/s

-- Speed of sound in iron . . . . . 5,130 m/s

But let's go a little farther !
Rails used to be made of cast iron or wrought iron.
But now they're made of hot rolled steel.

-- Speed of sound in steel . . . . . 6,100 m/s

   Time to cover the distance = (distance) / (speed)

   Time through air = (100,000 m) / (343 m/s)

   = 291.5 sec = 4 minutes 51.5 seconds

Time through old iron rails = (100,000 m) / (5,130 m/s)

   =   19.5 seconds (272 sec sooner)

Time through new steel rails = (100,000 m) / (6,100 m/s)

   = 16.4 seconds   (275 sec sooner)

Final answer:

The speed of sound varies in different mediums. In Physics, the speed of sound in air at 0°C is about 331.5 m/s, while in iron it's about 5130 m/s. If a train is 100 km away, the sound travelling through the iron rails would reach you approximately 282 seconds sooner than the sound through the air.

Explanation:

In Physics, the speed at which sound travels depends on the medium through which it's travelling. The speed of sound in air at 0°C is approximately 331.5 m/s. On the other hand, the speed of sound in iron is about 5130 m/s.

To determine how much sooner you would hear the train, we need to calculate the difference in time it takes for the sound to travel through these two mediums.

When the train is 100 km away, we get the following:

Time through air: 100000 m / 331.5 m/s = 301.66 seconds
Time through iron: 100000 m / 5130 m/s = 19.49 seconds

The difference is, therefore, approximately: 301.66 - 19.49 = 282.17 seconds. Thus, the sound will reach you 282 seconds sooner if you listen to the rails rather than the air.

Learn more about Speed of Sound here:

brainly.com/question/35989321

#SPJ12

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