![subject](/tpl/images/cats/fizika.png)
Physics, 29.06.2019 16:00 Robinlynn228
An object is situated to the left of a lens. a ray of light from the object is close to and parallel to the principal axis of the lens. the ray passes through the lens. which one of the following statements is true? (a) the ray crosses the principal axis at a distance from the lens equal to twice the focal length, no matter whether the lens is converging or diverging. (b) the ray passes through the lens without changing direction, no matter whether the lens is converging or diverging. (c) the ray passes through a focal point of the lens, no matter whether the lens is converging or diverging. (d) the ray passes through a focal point of the lens only if the lens is a diverging lens. (e) the ray passes through a focal point of the lens only if the lens is a converging lens.
![ansver](/tpl/images/cats/User.png)
Answers: 1
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 10:50
Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.
Answers: 3
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 19:40
Which of the following is a characteristic shared by both electron and light microscopes? a. they both employ the use of objective lenses. b. both microscopes require an internal camera to visualize the specimen. c. both microscopes have a resolving power of 0.01 nm. d. they both utilize white light to magnify the specimen.
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 21:50
As microwave light travels through a liquid, it moves at a speed of 2.2 x 108 m/s. if the frequency of this light wave is 1.1 x 108 hz, what is the wavelength of this microwave?
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 23.06.2019 00:30
Asmall electric heater, immersed in 80g of water in a calorimeter of 40j/k raises the temperature from 10.5 degree celsius to 25 degree celsius in 12 minutes. using the same apparatus with 50g of oil instead of water, it is found that the temperature of oil rises from 7 degree celsius to 27 degree celsius in 10 minutes. find specific heat capacity of the oil.
Answers: 2
You know the right answer?
An object is situated to the left of a lens. a ray of light from the object is close to and parallel...
Questions
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 12.04.2021 17:50
![question](/tpl/images/cats/mat.png)
Mathematics, 12.04.2021 17:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/istoriya.png)
History, 12.04.2021 17:50
![question](/tpl/images/cats/mat.png)
Mathematics, 12.04.2021 17:50
![question](/tpl/images/cats/biologiya.png)
Biology, 12.04.2021 17:50
![question](/tpl/images/cats/istoriya.png)
History, 12.04.2021 17:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mkx.png)
Arts, 12.04.2021 17:50
![question](/tpl/images/cats/mat.png)
Mathematics, 12.04.2021 17:50
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/istoriya.png)
History, 12.04.2021 17:50
![question](/tpl/images/cats/en.png)
English, 12.04.2021 17:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 12.04.2021 17:50
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 12.04.2021 17:50