Govt. Exams
Entrance Exams
A turbine is not a simple machine. The six simple machines are lever, pulley, inclined plane, wedge, screw, and wheel-axle.
Ice has lower density than water, which is why ice floats on water. Water expands when it freezes.
The liver is the largest internal organ by mass, weighing approximately 1.5 kg in adults.
Newton's third law states that for every action, there is an equal and opposite reaction. Forces always occur in pairs.
Melting of ice is a physical change as water remains H₂O but changes from solid to liquid state. Other options are chemical changes.
The Sun is the primary source of energy for Earth, providing energy through radiation that drives weather, climate, and photosynthesis.
Nitrogen comprises about 78% of Earth's atmosphere, followed by oxygen at about 21%.
AB blood group is the universal recipient because it has both A and B antigens, allowing it to receive blood from all groups.
Solar energy is renewable as the sun's energy is continuously available. Coal, petroleum, and natural gas are non-renewable fossil fuels.
The pancreas produces insulin, a hormone that regulates blood glucose levels. The beta cells in the pancreas secrete this hormone.
