12 Questions
What is the formula for kinetic energy of an object of mass 'm' moving with velocity 'v'?
$KE = \frac{1}{2}mv^2$
Differentiate between Mass and Weight of an object.
Mass is the amount of matter in an object, while weight is the force exerted on an object due to gravity.
Explain the working of SONAR.
SONAR stands for Sound Navigation and Ranging. It works by emitting sound waves and detecting their reflections to determine the distance and shape of underwater objects.
What do you mean by nitrogen fixation?
Nitrogen fixation is the process by which nitrogen gas from the atmosphere is converted into ammonia or other organic compounds by bacteria or cyanobacteria.
What is the potential energy at point A?
Potential energy at point A is maximum
What is kinetic energy at point A?
Kinetic energy at point A is zero
What is the total energy KE+PE known as?
Total energy KE+PE is known as mechanical energy
Give the statement of the law of conservation of energy.
The total energy of an isolated system remains constant over time.
What will be the potential energy when the body reaches the ground at point C?
Potential energy at point C will be zero
Define isotopes.
Isotopes are atoms of the same element with the same atomic number but different mass numbers.
Why do isotopes have identical chemical properties?
Isotopes have identical chemical properties because they have the same number of electrons.
Write two isotopes of chlorine.
Two isotopes of chlorine are chlorine-35 and chlorine-37.
Test your understanding of kinetic energy calculation for objects with uniform velocities and differences between mass and weight. Derive expressions for kinetic energy and identify key points of distinction between mass and weight of an object.
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