Download App

Work And Energy — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceWork And Energy2 Marks
Question
Write the relation between power, energy and time.
✓

Answer

With power and energy, power is units of energy divided by time. The same difference as distance and velocity. The units of power are watts, the units of energy are joules. A watt is one joule divided by one second.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Que-Ans (Each of 2 Mark )" from Work And Energy→Work And Energy — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Give role of atmosphere in climatic control.

→
The valencies (or charges) of some of the ions are given below:
Ion
Valency(Charges)
Ion
Valency(Charge)
Sodium ion
1+
Bromide ion
1-
Ammonium ion
1+
Hydroxide ion
1-
Calcium ion
2+
Sulphate ion
2-
Lead ion
2+
Phosphate ion
3-
Using this information, write down the formulate of the following compounds:
  1. Sodium phosphate.
  2. Ammonium sulphate.
  3. Calcium hydroxide.
  4. Lead bromide.
→
Joseph jogs from one end A to the other end B of a straight 300m road in 2 minutes 30 seconds and then turns around and jogs 100m back to point C in another 1 minute. What are Joseph’s average speeds and velocities in jogging (a) from A to B and (b) from A to C?
→
What about a sponge? It is a solid yet we are able to compress it. Why?
→
What are simple tissres? Explain their three different types
→
Give any two uses of radioactive isotopes.
→
What are radioactive isotopes? Give two examples of radioactive isotopes
→
Root hair is extension of which type of cell?
→
What is meant by uniform circular motion? Give two examples of uniform circular motion.
→
Compare the properties of metals and non-metals with respect to:
  1. Malleability.
  2. Ductility.
  3. Electrical conductivity.
→