Following are given the differences between manures and fertilisers.
Which of the given differences are incorrect?
A (ii) and (v) only
B (i), (ii) and (v) only
C (iii) and (iv) only
D (i), (iii) and (v) only
A 12 m long uniform bridge weighing 100000 N is being supported at the two ends. A lorry weighing
30000 N is parked at the 4 m mark as shown in the
figure. What are the forces acting on the bridge by
support A and support B respectively?
|Support A||Support B|
|A||70000 N||60000 N|
|B||60000 N||70000 N|
|C||65000 N||65000 N|
|D||90000 N||40000 N|
Study the given food web carefully and select the correct option regarding it.
A There are three food chains in this web.
B There are three herbivores and four carnivores in this web.
C An increase in population of grasshopper or deer is likely to cause decrease in grass population.
D All of these
A pendulum swings backwards and forwards passing through Y, middle point of the oscillation.
The first time the pendulum passes through Y, a stopwatch is started.
The twenty-first time the pendulum pass through Y, the stopwatch is stopped. The reading is T.
What is the time period of the pendulum?
The answer should be T/21 or T/20. How come T/10?
Observe the given figure carefully and choose the correct statement.
A Processes (iii) and (iv) involve absorption of heat energy.
B Process (v) involves condensation and freezing.
C Processes (i) and (iii) evolve heat energy.
D Process (v) absorbs a lot of heat energy.
How in processes v condensation came?
Shred a paper in tiny pieces. Take a comb and comb your hair. Now bring the comb closer to the paper pieces. What will you observe?
A The paper pieces will get repelled due to magnetic force.
B The paper pieces will get repelled due to electrostatic force.
C The paper pieces will get attracted and stick to the comb due to electrostatic force.
D The pieces will get attracted and stick to the comb due to frictional force.
Ravi in his dream saw a strange animal which had six legs, orange hair on skin and one eye on the forehead. It was feeding its young one milk. If really existed, it would have belonged to the same group as _____.
A Guppy fish
The object X is made up of two materials 1 and 2.When the light is shone on it, it casts a shadow on
screen as shown in the picture.
Identify materials 1 and 2 of which object X is made.
|Material 1||Material 2|
|B||Cardboard||Clear plastic sheet|
|C||Clear cellophane paper||Styrofoam|
is answer B correct?