Unit of torsional rigidity
The unit of torsional rigidity is Nm<sup>2</sup>
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Mention one use of part of electromagnetic spectarn to which a wavelength of 21 cm emitted by hydrogen in interesteller space belong
Radio waves.
The minimum charge on an object is
The minimum charge on an object is 1.6×10<sup>-19</sup> Coulomb.
Why do stars twinkle and planet do not?
Answer: The stars are present very far away from us. The light coming from them get refracted multiple times and... View Article
Write five lines on the sun
Five lines on the sun: Sun is the main source of energy. Sun is the source of solar power. Sun... View Article
Name all the planets according to their distance from the sun.
Answer: There are numerous planets that revolve around the sun in their own orbits. Our planet is also one of... View Article
Why does a swimmer push water backward with his hands in order to swim forward
According to the Newton’s 3rd law of motion, it states that ‘When one body exerts a force on the other... View Article
Which of the following is not usually a property of metal a) Conductivity b) Ductility c) Gas at room temperature d) Malleability
Option c) Gas at room temperature
Choose one more correct alternatives for work to be performed energy must be a)destroyed b) must be transferred from one place to another c) concentrated d) none of the above
Option b) must be transferred from one place to another
The main advantage of microwave is that- a. Highly directive. B.Moves at the speed of light. C.S/n ratio grater. D. High penetration power.
Option a. Highly directive
In india the most important source of energy is
The most important source of energy in India is coal.
Iron objects are generally electroplated with?
Iron objects are generally electroplated with chromium metal to prevent corrosion or rusting.
State and derive work energy theorem
The following are the factors that affect self-confidence: Experiences from childhood Societal exposure Friends and family
State the four laws of photoelectric emissions.
The following are the four laws of photoelectric emission: The time logging between the incident of light and emission of... View Article
An object is moving with variable speed, then its velocity will be a) Zero b) Constant c) Variable d) None of the above
Option c) Variable
What is standard room temperature in Kelvin
Normal room temperature 20-25K Considering the upper limit 25°C is taken as standard room temperature. Temperature on Celsius + 273... View Article
Rubber is a magnetic material. State whether the statement is True (or) False And Justify it.
Rubber is a non-magnetic material. Rubber is classified as a non-magnetic material since it cannot be attracted by a magnet.
What are the different types of resources?
Different types of resources are: Natural Resources Man-Made Resources
Name any two fossil fuels?
Coal and petroleum are the two types of fossil fuels.
Adding common salt to distilled water makes it a. Good conductor b. Insulator c. None of these d. Both a and b
Option a. Good conductor
