What is Red Data Book ?

The weight of 72 books in 9 kh. What is the weight of 40 such books?

What is the name of the book written by Aristotle ?

What is the Red drop effect ?

According to IUCN Red List, what is the status of Red Panda (Ailurus fulgens)

A carbon resistor is marked Red, Red, Red, Gold. What is the value of its resistance?

What is meant by red shift and blue shift?

What is abscissa of the point of intersection of the "Less than type" and of the "More than type" cumulative frequency curve of a grouped data?