TutorMe homepage
Subjects
PRICING
COURSES
SIGN IN
Start Free Trial
Yogesh M.
Tutor for two years and also have post qualification industry experience
Tutor Satisfaction Guarantee
Physics (Heat Transfer)
TutorMe
Question:

What happens to the volume of water when it cool down from room temperature to absolute zero temperature? Give reason.

Yogesh M.
Answer:

When water cooled down from room temperature to absolute zero temperature, the volume of water first decrease up to 4° C and then increases up to 0° C . Reason behind this is, when water cooled up to 4° C , it behave normally as inter-molecular space decreases and hence volume decreases. But on cooling from 4° C to 0° C , H-H bond starts repealing H-O-H bond and hence water molecules acquire hexagonal lattice structure with very large inter-molecular space, hence volume of water increase.

Mechanical Engineering
TutorMe
Question:

Which is the best way to Increase Carnot heat engine efficiency?

Yogesh M.
Answer:

As we know that, Carnot heat engine works between Hot reservoirs (Heat Source) and Cold reservoirs (Heat Sink), and efficiency of heat engine depends upon Heat Source temperature (Th ) and Heat Sink temperature ( Tc ), regardless of the working substance in the cycle. Efficiency (n) = 1 - Tc/Th . Since, Th has very large value and Increasing Th doesn't make any difference in heat content available at source. So, decrease in Tc will help to increase efficiency of engine. Also the temperature difference will increase i.e. Th - Tc.

Physics
TutorMe
Question:

Why can't we apply Classical Physics rules instead Quantum Physics rules at Atomic level?

Yogesh M.
Answer:

As we know that, In Classical Physics, position, Velocity of particle can be traced easily which is not possible in case of atomic level. Also Force is directly proportional to mass of object, so Gravitational force dominates Electromagnetic Force, Strong Nuclear force, Weak Force. If we apply Force proportional to mass rule at atomic level, the mass of atomic particles are of 9.11E-31 to 1.67E-27 level. So It is clear that Other forces i.e. Electromagnetic Force, Strong Nuclear force, Weak Force will dominate Gravitational force. That is why we cant apply Classical Physics at Quantum level. If we take reference forces based on the strongest at an atomic level: Strong Force ---> F = 1 Electromagnetic Force ---> F = 1/137 Weak Force -----> F∼E−5 Gravitational Force -----> F∼E−40)

Send a message explaining your
needs and YOGESH will reply soon.
Contact YOGESH
Ready now? Request a lesson.
Start Session
FAQs
What is a lesson?
A lesson is virtual lesson space on our platform where you and a tutor can communicate. You'll have the option to communicate using video/audio as well as text chat. You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.
How do I begin a lesson?
If the tutor is currently online, you can click the "Start Session" button above. If they are offline, you can always send them a message to schedule a lesson.
Who are TutorMe tutors?
Many of our tutors are current college students or recent graduates of top-tier universities like MIT, Harvard and USC. TutorMe has thousands of top-quality tutors available to work with you.