Ice is floating on water in a beaker when the ice melts completely, the level of water in the beaker will be?
(A) will increase
(B) first increase then decrease
(C) will decrease
(D) will remain the same
Therefore, when the ice melts its volume decreases but the volume of water will remain the same. Hence even after the ice melts, there will be no rise in the level of the water. So, the level of the water will remain unchanged.
A person climbing a hill leans forward because?
(A) Able to walk fast
(B) To increase stability
(C) To conserve power
(D) Reduce the chances of slipping
Force is the product of?
(A) mass and velocity
(B) weight and acceleration
(C) mass and acceleration
(D) weight and velocity
If the velocity of an object is doubled?
(A) momentum is doubled
(B) kinetic energy becomes four times
(C) both of the above
(D) none of these
A wooden swing is swinging in a sitting position, the time period of oscillations when the girl is standing?
(A) will decrease
(B) remain unchanged
(C) will be more
(D) none of these
Which of the following metals is used as a semiconductor in transistors?
(A) Silver
(B) Graphite
(C) Germanium
(D) All of these
What is a Coolidge tube used to produce?
(A) Micro waves
(B) Radio waves
(C) X Rays
(D) None of these
What is silicon?
(A) Insulator
(B) Conductor
(C) Semiconductor
(D) None of these
What is the anti-particle of electrons?
(A) Positron
(B) Proton
(C) Alpha-Particle
(D) Beta-Patakal
Who is the discoverer of hydrogen?
(A) Priestley
(B) Cavendish
(C) Ure
(D) Levizer
Get the Examsbook Prep App Today