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tino4ka555 [31]
2 years ago
6

Objects that absorb shorter wavelengths of light are perceived as ______, those that absorb longer wavelengths are perceived as

______, those that reflect all wavelengths are perceived as ______, and those that absorb all wavelengths are perceived as ______.
Physics
1 answer:
miss Akunina [59]2 years ago
4 0

According to the visible spectrum, we can deduce the following:

  1. Objects that absorb shorter wavelengths of light are perceived as <u>red</u>.
  2. Objects that absorb longer wavelengths are perceived as <u>blue</u>.
  3. Objects that reflect all wavelengths are perceived as <u>white</u>.
  4. Objects that absorb all wavelengths are perceived as <u>black</u>.

<h3>What is light?</h3>

Light can be defined as a form of electromagnetic waves (radiation) that do not require any medium for its propagation. Thus, light is generally referred to as a visual signal because it can be seen with the eyes.

<h3>The wavelength of light.</h3>

Based on scientific records, the wavelengths of light that can be seen by humans with their eyes is between the range of 400 to 750 nanometers (nm).

According to the visible spectrum, we can deduce the following:

  1. Objects that absorb shorter wavelengths of light are perceived as <u>red</u>.
  2. Objects that absorb longer wavelengths are perceived as <u>blue</u>.
  3. Objects that reflect all wavelengths are perceived as <u>white</u>.
  4. Objects that absorb all wavelengths are perceived as <u>black</u>.

Read more on wavelength here: brainly.com/question/25699025

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During aerobic activity, if your heart rate is lower than the lower limit, you are ___________________.
soldier1979 [14.2K]
Not pushing yourself hard enough is the answer since your heart rate doesn't even hit your lower minimum.
Pushing yourself to the limit is at your max heart rate.
Just at the right spot is at your max heart rate.
Pushing yourself too hard is above your max heart rate.
4 0
4 years ago
A 25 kg lamp is hanging from a rope. What is the tension force being supplied by the rope?
d1i1m1o1n [39]

The tension force being supplied by the rope is 245 N.

<h3>What is tension force?</h3>
  • Tension force is the force exerted on a rope or cord due to the weight of an object suspended from it.

The tension force on the given rope due to the weight of the lamp hanging from the rope is calculated by applying Newton's second law of motion as shown below;

T = mg

where;

  • m is the mass = 25 kg
  • g is acceleration due to gravity = 9.8 m/s²

T = 25 x 9.8

T = 245 N

Thus, the tension force being supplied by the rope is 245 N.

Learn more about tension force here: brainly.com/question/2008782

4 0
2 years ago
If lightning is caused by electricity in the air during a thunderstorm, what causes thunder?
NikAS [45]

Answer:

Since light travels faster than sound, the lightning arrives before the thunder. But thunder is the sound of lightning shooting through the sky in a thunderstorm.

Explanation:

7 0
3 years ago
Read 2 more answers
The particle of 2 velocities 10m/s due east and 12m/S in the direction 30N/E. What is the resultant velocity and the direction?
Paha777 [63]

Answer:

See below

Explanation:

East components are   10    and    12 cos 30   = 20.392 m/s

North component =  12 sin 30 = 6 m/s

Resultant velocity = sqrt ( 20.392^2 + 6^2) = <u>21.26 m/s </u>

  direction   arc tan   (6/20.392) = <u>16.4 degrees N of east </u>

8 0
2 years ago
Water leaks out of a 3,200-gallon storage tank (initially full) at the rate V '(t) = 80 -t, where t is measured in hours and V i
kvasek [131]

Answer:

water leak is 650 gallons

time required to full drain is 80 hrs

Explanation:

given data

volume V = 3200 gallon

rate = V(t) = 80 - t

to find out

how much water leak between 10 and 20 hour and  drain complete

solution

we know here rate is 80 - t

so here rate will be

\frac{dV(t)}{dt} = 80 - t

and for time 10 and 20 hour

take integrate between 10 and 20

so water leak = \int\limits^ {20}_ {10} {(80-t)} \, dt   .....................1

water leak = ( 80t - \frac{t^{2} }{2} )^{20}_{10}

water leak = 650

so water leak is 650 gallons

and

we know here for full tank drain condition

water leak full = 80 t - \frac{t^{2} }{2}

3200  = 80 t - \frac{t^{2} }{2}

6400 = t² - 160 t

t = 80

so time required to full drain is 80 hrs

6 0
4 years ago
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