Question

28.Verify that whether -1 is zero of the polynomial p(x) = 2x

3

- 9x

2 + x + 12 and find the

value of p(0), p(1), p(2).​

Answer 1

Answer:

Ans. It is the transformation of our muscular energy into mechanical energy to ride the bicycle

8. Does the transfer of energy take place when you push a huge rock with all you might and fail to move it? Where is the energy you spend going?

Ans. While we push a huge rock with all our might(power) but fail to move it no energy transfer occurs as cellular energy simply wastes out in muscle contraction and relaxation even heat generation(sweating)

9. A certain household has consumed 250 units of energy during a month. How much energy is this in joules?

Ans. Energy consumed by a certain