Author name: khushikhanera

Q1: Distinguish between speed and velocity.Ans: Speed of a body is the distance travelled by a body  per unit time while […]

Q1: Who discovered cells, and how?Ans: Robert Hooke, an English scientist, discovered cells in 1665. While examining a tiny slice of

Q1: On the basis of Thomson’s model of an atom, explain how the atom is neutral as a whole.Ans: As per

Q1: Define the atomic mass unit.Ans: One atomic mass unit is a mass unit equal to exactly one-twelfth (1/12th) the mass of one

Short Ans Type: Ques 1. Suggest separation technique(s) one would need to employ to separate the following mixtures.(a) Mercury and

Short Question Answer: Matter in Our Surroundings Q1: The mass per unit volume of a substance is called density. (density

Q1: Name any two fodder crops.Ans: Berseem and Sudan grass are raised as food for the livestock, called fodder crops. Q2:

Q1: What does wave transfer – matter or energy?Ans: Energy. Q2: What is the intensity of sound?Ans: Sound intensity is the sound

Q1: A spring which has been kept compressed by tying its ends together is allowed to be dissolved in an