A piece of copper and another of germanium are cooled from room temperature to 80 K. Then, which of the following is true regarding their resistances? A. Each of them increase B. Each of them decreases C. Copper increases and germanium decreases D. Copper decreases and germanium increases

What type of questions asked from the lesson of magnetic effect of electric current 

Wavelength of green light is

A) 400-450 nm

B) 500-550 nm

C) 660-720 nm

D) 720-800 nm

What is the difference between anaerobic & aerobic respiration? Name some organism that uses the aerobic mode of respiration?

What are the main components of our environment? Explain each of them briefly.

What are examples of hydrotropism plants?