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25 Views

Hello There, My question is about the CBSE term 1 exam for class 12. It looks like my daughter will not be able to take the term 1 exam (COVID) (unless CBSE provides an online option) in case if she misses the offline exam, then what are the other options? to retake the term1 exam? Thanks

Shivanshu 26th Nov, 2021

Dear aspirant !

Hope you are doing well ! This is not right thing to leave the exam because covid is in control now,it will affect her future ,so it is recommended not to absent in any exam ,also school as well as cbse do not tell about this thing

30 Views

C-cat (Cdac) didnt come for the 2nd time this year. When can we expect it to come in 2022

bagul.atharva009 31st Dec, 2021

Hello Shubham.

C-CAT is an entrance exam for enrolling in courses offered by the centre for development of advance computing (CDAC). Following is the answer to your question.


CDAC C-CAT 2022 Exam Date :-

1.Beginning of Online Registration and Application for C-CAT : December 23, 2021

~~~~~~~~~~~~~~~~~~~~~~~~~~~

2.Closing of Online

144 Views

Light has no mass so it also has no energy according to Einstein, but how can sunlight warm the earth without energy?

Nitin Mereddy 16th Nov, 2021

In the above equation, E is the total energy of the particle, p is the momentum of the particle (which is related to its motion), c is the speed of light, and m is the mass of the particle. This equation can be derived from the relativistic definitions of the

39 Views

If I hammered and flattened a penny enough, could I cover the entire earth with it?

Nitin Mereddy 16th Nov, 2021

No. If you spread out the atoms from a single penny over the entire surface of the earth, you would no longer have a single piece of solid material since the atoms would be too far apart to bond to each other. Let's do some careful calculations to show this

38 Views

How does sound going slower in water make it hard to talk to someone underwater?

Nitin Mereddy 16th Nov, 2021

Sound travels faster in water than in air. The speed of sound in air under typical conditions is about 343 meters per second, while the speed of sound in water is about 1,480 meters per second. Fundamentally, standard sound is a compression wave traveling though a material. You can think

121 Views

How does a microwave oven heat up food even though it emits no thermal radiation?

Nitin Mereddy 16th Nov, 2021

A microwave oven does emit thermal radiation to heat up food. Microwave radiation is thermal radiation. For some reason, pre-college teachers and books have a mistaken notion that thermal radiation = infrared radiation. All frequencies of the electromagnetic spectrum carry energy, from radio waves, microwaves, infrared waves, visible light, ultraviolet,

466 Views

How can it be so hard to drag rubber across smooth glass if friction is caused by surface roughness?

Sree Student Expert 16th Nov, 2021

Hello student,

Friction is caused not only because of rough surface, it is because of adhesive forces too. Rubber and glass are electrically neutral and non-polar atoms, if they are brought together they include electric dipole moments.

In oresence of these weak bonds, if these objects are brought together they

63 Views

Does the negative mass of antimatter mean that its gravitationally repelled from stars?

Nitin Mereddy 16th Nov, 2021

Antimatter does not have negative mass. In our universe, there is no such thing as negative mass. Mass only comes in positive form. In contrast, electric charge can be positive or negative. The nonexistence of negative mass has profound consequences. First, gravity is always attractive and never repulsive. Presumably, if

50 Views

Why dont trees freeze and burst in the winter like cold pipes?

Nitin Mereddy 16th Nov, 2021

In many cases, trees do partially freeze in the cold of winter and burst like plumbing pipes in an unheated home. When liquid water freezes to ice, it expands in volume because of the way the water molecules spread out to form a solid crystalline lattice. If the water is

298 Views

Why do humans have an appendix even though it is unnecessary?

Nitin Mereddy 16th Nov, 2021

The human cecal appendix is not completely unnecessary. In humans, the appendix is a small, dead-end tube that connects to the colon near where the small intestines feeds into the large intestines. Being a dead-end tube, the appendix can obviously not transport food and waste through the intestinal tract. Furthermore,

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