The Harappa’s system of standardized weights and measures signified advance technology and an advancing civilization in the Indus River Valley. Remarkable accuracy in systems and tools of the Harappan people were demonstrated by fire-baked bricks which were consistently moisture resistant and uniformly sized.
Answer:
d). It is easier to make a large reflecting telescope than a large refracting telescope.
f). A reflector can collect more light than a refractor.
Explanation:
A telescope is a device that is used to observe distant objects by the use of lenses and mirrors. It is also used to observe different distant objects by their reflection, absorption, emission or the reflection of the electromagnetic radiations.
Most of the professional telescopes are reflectors because :
1. The reflected telescope is able to receive more of the light when it reflects all the light falling on surface. And it is easier for making a large telescope rather then making large lenses for the refracting telescope. So it is easier to make large reflecting telescope than a large refracting telescope.
2. A reflected telescope receives all the wavelength of the light and it reflects all the light falling on the surfaces where it is refracted telescope that contains lenses cannot absorbs all the light and causes the chromatic aberration.
Answer: I think the answer is D
Answer:
Zoom- helps teachers and students meet each other.
(sorry this is the only one i can think of. Hopefully this can help spark your thinking.)
Answer
Accelerates algal growth and reduces oxygen.
Explanation eutrophication is the nutrient induced increase in phytoplankton productivity.
