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Atith Adhikari asked a question

It is theoretically possible for a substance to have a negative value of cubical expansivity, which means that the substance would contract rather than expand when the temperature increases. However, it is very rare for a substance to have a negative value of cubical expansivity over a significant range of temperatures.

One example of a substance that has a negative value of cubical expansivity over a limited range of temperatures is water. Water has a positive value of cubical expansivity at...

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Rabin Kalikote 12 months ago
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1 Comments
Surakshya Pandey

very fine!

Rabin Kalikote

Glad to hear, miss!

7mo
Chandan Yadav about 3 years ago
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2 Comments
KRISH YADAV

The Rh factor(the Rhesus factor or Rh antigen), is a protein that can be found on the surface of red blood cells. It is one of the most important blood group systems in human blood typing. The presence or absence of the Rh factor is denoted as either Rh-positive (+) or Rh-negative (-).

Reply over 2y
KRISH YADAV

Fun fact: The Rh factor is named after the Rhesus monkey, in which the protein was first discovered.

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Rabin Kalikote over 3 years ago
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2 Comments
Bal Bahadur BK

Great my son!

Reply over 3y
Pranish Uprety

You've been truly inspiration, dai! Congratulations to you and all of us.

Reply over 3y
Diwas Pandit asked a question

Yes, a vector which has zero magnitude is also a vector in case of two vectors travelling in opposite directions with equal magnitudes. At this case, the resultant vector has zero magnitude but it is still a vector. We call it a null vector.

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Diwas Pandit asked a question

A negative of a vector represents the direction opposite to the reference direction. It means that the magnitude of two vectors are same but they are opposite in direction.

For example, if A and B are two vectors that have equal magnitude but opposite in direction, then vector A is negative of vector B.

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