Q.2 Very Short Q/A.
(a) What is the unit of frequency?
(b) Define rolling Friction?
(c) What is the Electrostatic Force?
(d) Adolescents should be careful Abou
(e) What do you mean by puberty?
Answers
Answer:
here's your answers dear.....
Explanation:
1.The number of periods or cycles per second is called frequency. The SI unit for frequency is the hertz (Hz). One hertz is the same as one cycle per second.....
2.The force resisting the motion of a rolling body on a surface is known as rolling friction or rolling resistance. Rolling of ball or wheel on the ground is an example of Rolling friction. The other type of friction is sliding friction. ... Pushing a box across the table is an example of Sliding friction....
3.Electrostatics is a branch of physics that studies electric charges at rest. Since classical physics, it has been known that some materials, such as amber, attract lightweight particles after rubbing. The Greek word for amber, ήλεκτρον, or electron, was thus the source of the word 'electricity'.....
4.Adolescence should be careful about what they eat, because: (i) proper diet develops thcir brains. (ii) proper diet is needed for the rapid growth taking place in their body. (iii) adolescents feel hungry all the time....
5.Puberty (say: PYOO-ber-tee) is the name for the time when your body begins to develop and change as you move from kid to adult. ... During puberty, your body will grow faster than at any other time in your life, except for when you were a baby.....
hope this will helpful to you...
alle follow Kar dena...
a) What is the unit of frequency?
➜The SI unit for frequency is the hertz (Hz).
b) Define rolling Friction?
➜The force resisting the motion of a rolling body on a surface is known as rolling friction or rolling resistance.
c) What is the Electrostatic Force?
➜The electrostatic force is also known as the Coulomb force or Coulomb interaction. It's the attractive or repulsive force between two electrically charged objects.
d) Adolescents should be careful About?
➜Adolescence should be careful about what they eat, because:
(i) proper diet develops thcir brains.
(ii) proper diet is needed for the rapid growth taking place in their body.
(iii) adolescents feel hungry all the time.
e) What do you mean by puberty?
➜The condition of being or the period of becoming first capable of reproducing sexually that is brought on by the production of sex hormones and the maturing of the reproductive organs (such as the testes and ovaries), development of secondary sex characteristics (such as male facial hair growth and female breast).