____________is the fundamental quantity.

Newton, henry, ampere and watt are__________named after scientist.

The area under velocity – time graph represents the

Unit of acceleration is

_________ is used as reflectors in torchlight.

Mirrors having spherical surface of reflection are __________________

The separation of denser particles from lighter particles done by rotation at high speed is called ________

_____ is a process by which a substance changes from the liquid to gaseous state.

James Chadwick observed when was exposed to a particle, particles with about the same mass as protons were emitted.

Gay-Lussac law always dealing with________

Assertion (A): The skill of estimation is important for all of us in our daily life.
Reason (R): The skill of estimation reduces our consumption of time
(a) Both A and R are true but R is not the correct reason
(b) Both A and R are true and R is the correct reason
(c) A is true but R is false
(d) A is false but R is true

Mark the correct choice as:
(a) Both assertion and reason are true and reason is the correct explanation of assertion.
(b) Both assertion and reason are true but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Assertion is false but reason is true.
Assertion: One can determine the distance moved by the car from its velocity-time graph.
Reason: The area under the velocity-time graph gives the distance moved by the car in a given interval of time.

Assertion: A ray of light from an object successively bends away from the normal and undergo total internal reflection.
Reason: If the angle of reflection for the air near the ground reduces the critical angle.

Convert: 300 K into Celsius scale,

Give two examples of transparent medium that are denser than air

Why are convex mirrors preferred to use rear view mirrors in vehicles?

Why is it possible to row a boat in water but not pass through a wooden fence

Name an element which has the same number of electrons in its first and second shell

Copy the following and write the names of the laws and their simple definitions in the space provided.

Name the other particles present in the Nucleus of an atom.

How will you measure the least count of vernier caliper?

Complete of following sentences
a. The acceleration of the body that moves with a uniform velocity will be ________
b. A train travels from A to station B with a velocity of 100 km/h and returns from station B to station A with a velocity of 80km/h. Its average velocity during the whole journey in ______________ and its average speed is ____________

Write the relation between the angle of incidence and the angle of refraction?

Define Homogeneous mixture

Calculate the number of neutrons, protons and electrons (i) atomic number 3 and mass number 7 (ii) atomic number 92 and mass number 238.

How are homogenous solutions different from heterogeneous solution? Explain with examples.

Distinguish between boiling and evaporation.

Give experimental evidence for the discovery of neutron.