Work and Energy — Science STD 9 — Question

With neat diagram explain the structure of diamond.

(a) Can your father climb stairs as fast as you can?
(b) Will you fill the overhead water tank with the help of a bucket or an electrical motor?
(c) Suppose Raj ashree, Yash and Ranjeet have to reach the top of a small hill. Raj ashree went by car. Yash went cycling while Ranjeet went walking. If all of them choose the same path, who will reach first and who will reach last? (Think before you answer.

Using the chart of ions/radicals and the cross-multiplication method, write the chemical formulae of the following compounds:
Ammonium phosphate

Explain with suitable examples, the relationship between weather forecasting and disaster management.

What problems do you get after playing colours on Rang Panchami? Why?

What is an echo? What factors are important to get a distinct echo?

How do refracting telescopes work?

What is the structure of lichen, a condiment? Where else is it used?

As you watch the match being played on your school ground, you will see the control and co-ordination among the movements of the players. Make a list of all such different actions.