![subject](/tpl/images/cats/fizika.png)
Physics, 28.11.2019 06:31 psychiclion
Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near infrared, whereas deoxygenated hemoglobin has the opposite absorption. this fact is used in a "pulse oximeter" to measure oxygen saturation in arterial blood. the device clips onto the end of a person's finger and has two light-emitting diodes --a red (635 nm) and an infrared (905 and a photocell that detects the amount of light transmitted through the finger at each wavelength.
if 64% of the energy of the red source is absorbed in the blood, by what factor does the amplitude of the electromagnetic wave change?
![ansver](/tpl/images/cats/User.png)
Answers: 3
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 16:00
While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 20:10
Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 23.06.2019 09:00
1,990,000,000,000,000,000,000,000,000,000 in scientific notation
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 23.06.2019 18:10
Achild on a spinning playground ride is 0.36 m from the center of the ride. the centripetal force on the child is 19 n. what is the mass of the child if the child has a tangential 3.7 kg 13 kg 23 kg 79 kg
Answers: 3
You know the right answer?
Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near infra...
Questions
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/en.png)
English, 12.12.2020 16:00
![question](/tpl/images/cats/mat.png)
Mathematics, 12.12.2020 16:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 12.12.2020 16:00
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 12.12.2020 16:00
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 12.12.2020 16:00
![question](/tpl/images/cats/mat.png)
Mathematics, 12.12.2020 16:00
![question](/tpl/images/cats/mat.png)
Mathematics, 12.12.2020 16:00
![question](/tpl/images/cats/en.png)
English, 12.12.2020 16:00
![question](/tpl/images/cats/mat.png)
Mathematics, 12.12.2020 16:00