A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?
A. 25 miles per sec
B. 60 miles per sec
C. 7 miles per sec
D. 10 miles per sec
Everyday Science
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Two rails in a railway track are joined end to end with a gap tin between them because?
A. Steel can be saved
B. Accidents due to contraction in winter can be avoided
C. Air gaps are necessary for bearing the weight of running train
D. Accidents due to expansion in summer can be avoided
Two rails in a railway track are joined end to end with a gap tin between them because? Read More »
Which of the following explains the reason why there is no total eclipse of the sun?
A. Size of the earth in relation to that of moon
B. Orbit of moon around earth
C. Direction of rotation of earth around sun
D. Area of the sun covered by the moon
Which of the following explains the reason why there is no total eclipse of the sun? Read More »
Defeciency of following vitamin decreases hemoglobin production ?
A. Biotin
B. Thiamine
C. Niacin
D. Pyridoxine
Defeciency of following vitamin decreases hemoglobin production ? Read More »
Max Planck received the noble prize in Physics in 1918 for his discovery of
A. electron
B. energy quanta
C. photon
D. positron
Max Planck received the noble prize in Physics in 1918 for his discovery of Read More »
Acid rain is mainly caused by emissions of __________ in the atmosphere?
A. Sulfur Dioxide and Potassium Nitrate
B. Sulfur and Charcoal
C. Nitrogen Oxide and Potassium Nitrate
D. Sulfur Dioxide and Nitrogen Oxide
Acid rain is mainly caused by emissions of __________ in the atmosphere? Read More »
The good sources of iodine are
A. green leafy vegetables
B. seeds
C. fresh vegetables and fruits
D. sea foods
The good sources of iodine are Read More »
Carrot is good source of Vitamin
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
Carrot is good source of Vitamin Read More »
1 light year is equal to ?
A. 9.5×106 km
B. 9.5×109 km
C. 9.5×1012 km
D. 9.5×1018 km
1 light year is equal to ? Read More »