A boy weighing 60 kg f is standing on a wooden plank of 2 m x 0.3 m. What will be the pressure exerted by him on the plank?
A92 kg f m-2
B60 kg f m-2
C10 kg f m-2
D100 kg f m-2
explain hoe the calculations are made>
Two different shaped magnets (X and Y) are shown here and their parts are labelled. Select the option P that correctly identifies their strongest parts.
-------Magnet X------Magnet Y
Which of the following features of Earth's landscape is a result of action of a river on the surface?
Flasks X, Y and Z in the figure show three states of matter.
Which of the following options is incorrect regarding this?
A Materials in state X have no definite shape and volume.
B Materials in state Y have definite volume but not shape.
C Materials in state Z have definite shape and volume.
D None of these
Shadow of an object was formed on a screen as given in the diagram.Which of the following objects would not form this shadow?
A An egg
B A vase
C A cone
D A metal ring
isn't the ans A
The food chains can be represented with pyramid of numbers such as d, e and f as shown here. How the following food chains (i) and (ii) could be represented with pyramids d, e and f?
(i) Grass → Sheep → Man
(ii) L ime tree → Caterpillars → Mynas
(A) (i) - d, (ii) - e
(B) (i) - d, (ii) - f
(C) (i) - e, (ii) - f
(D) (i) - d, (ii) - d
good one !
Doors and windows are oppositely placed in a house to
(A) Allow more sunlight
(B) Allow better ventilation
(C) Allow free flow of germs
(D) Both (A) & (B).
Yes. It allows better ventilation. But how doors and windows oppositely placed, will allow more sunlight?
The polar bear has some adaptative to live in extremely cold climate of polar regions. Some are given in the box.
Select the correct adaptation values of the features P, Q and R from the following :
i Helps in catching the prey
ii Helps in high speed running
iii Insulates the body
iv Makes it a good swimmer
v Reduces heat loss
vi Makes it walk on snow easily
vii Sensitive hearing
A P → v, Q → vii, R → ii
B P → iv, Q → iii, R → i
C P → iii, Q → v, R → vi
D P → iii, Q → vii, R → ii
It seems wrong answer again
Study the diagram of human digestive system and answer the question.
What is true regarding the organ N in human body?
A It helps in the digestion of food
B It helps in absorption of food
C It is the smallest part of digestive system.
D Both A and B
The process of digestion ends in the small intestine and the large intestine absorbs water.So answer should be B.