Question

Q1.The wavelength of light is 800 nm. Express in (2)
I)Angstrom II)Metre
Q2.Complete the following: I) 1fermi=________m (2)
II) 1 nano second =_________ s
Q3. Define (i)amplitude (ii) light year (2)
Q4. Differentiate between speed and velocity. (2)
Q5.Draw a graph showing the variation of square of time period(T2) with length(l)
of a pendulum (2)
Q6.State whether the following quantities are scalar or vector :-pressure,work ,density ,magnetic
field (2)
Q7.A pendulum completes 60 oscillations in 2 min. What is its (i)Time Period (ii)frequency
Q8.The velocity of an object decreases at a constant rate from 50 m/s to 20 m/s in 10 sec.Find acceleration of the object
Q9.Give an example of a body moving with a constant speed but with variable velocity.Draw a diagram representing such a motion. (2)
Q10)The mass of Neon atom is 20 u.Express it in kg.

Answer 1

Answer:

III, I, II, IV

Explanation:

1 Angstrom =10

−10

m

1 Micro =10

−6

m

1 Fermi =10

−15

m

1 light year =10

15

m

Hence, III<I<II<IV

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