A man jumps off a diving board of height h and reaches water. Which of the following is true in context to the given figure?
AAt point C kinetic energy is maximum
BAt point A kinetic energy is lowest while potential energy is highest.
CAt point B both kinetic energy and potential energy will be maximum.
DAt point A potential energy is minimum
Collecting rainwater and storing it for later use is called rainwater harvesting. Which of the following statements are not true for the technique of rooftop rainwater harvesting?
(i) Rainwater is allowed to go down the roadside drains.
(ii) Rainwater from roof top is collected in storage tanks.
(iii) The collected rainwater needs to be filtered as it contains soil.
(iv) This practice reduces the amount of ground water available to us.
A(i) and (ii) only
B(ii) and (iii) only
C(iii) and (iv) only
D(i) and (iv) only
A bird shooter was asked how many birds he had in his bag. He replied that there were all sparrows but six, all pigeons but six, and all ducks but six. How many birds did he have in all in his bag?
THE CORRECT ANS IS a BUT HOW?
Gloria is holding her hand quite close to the side of a candle flame without feeling hot. This is because
A Air is a gas and is a poor conductor of heat.
B Air is highly inflammable
C Candle flame does not produce heat.
D None of these
i think that the answer to this question should be(D) none of these.She goes not feel hot as the heat is only going upwards due to convection.That's why she doesn't feel hot.
Which one of the following graphical representations correctly represents the formation of a real, inverted and enlarged image by a concave mirror?
Paint applied to an iron surface prevents the iron from rusting. Which ONE of the following provides the best reason?
AIt prevents nitrogen from coming in contact with the iron
BIt reacts chemically with the iron
CIt prevents carbon dioxide from coming in contact with the iron
DIt prevents oxygen and moisture from coming in contact with the iron
Mount Fuji volcano erupted few years back. It threw out fine, glass-rich ash into the atmosphere. It thereby distrupted air traffic and caused inconvenience to air travel. It might also erupt again in future. Mount Fuji is an example of
please check the answer
Cross pollination is the process of
ATransfer of pollen grains from anther of one flower to stigma of other flower on different plant of the same species.
BTransfer of pollen grains from anther of one flower to stigma of the same flower.
CTransfer of pollen grains from anther of one flower to stigma of another flower on different plant of different species.
DBoth A and C