Physics Ball bearings are used in cycles, scooters etc to Reduce the friction between ground and the whee Increase the friction between the wheel and the axle Reduce the friction between the wheel and the axle None of these Reduce the friction between ground and the whee Increase the friction between the wheel and the axle Reduce the friction between the wheel and the axle None of these ANSWER DOWNLOAD EXAMIANS APP
Physics Metals are good conductors of electricity because: All of these They contain free electrons. They have high melting point. The atoms are lightly packed. All of these They contain free electrons. They have high melting point. The atoms are lightly packed. ANSWER DOWNLOAD EXAMIANS APP
Physics Which is evidence that supports the dynamo theory? Convection occurs in Earth's inner core Earth's outer core contains liquid that conducts electricity Earth's core contains a large amount of iron Granite and basalt conduct electricity Convection occurs in Earth's inner core Earth's outer core contains liquid that conducts electricity Earth's core contains a large amount of iron Granite and basalt conduct electricity ANSWER DOWNLOAD EXAMIANS APP
Physics The force of friction between two surfaces will increase if: A layer of lubricant is kept between the two surfaces Air gap is created between the two surfaces The two surfaces are pressed harder Irregularities on both the surfaces are removed A layer of lubricant is kept between the two surfaces Air gap is created between the two surfaces The two surfaces are pressed harder Irregularities on both the surfaces are removed ANSWER DOWNLOAD EXAMIANS APP
Physics What property of matter is momentum related to? Mass Velocity None of these Both A & B Mass Velocity None of these Both A & B ANSWER DOWNLOAD EXAMIANS APP
Physics The following particles move with same kinetic energy. Which of them has maximum momentum ? Alpha Particle Electron Proton Deutron Alpha Particle Electron Proton Deutron ANSWER DOWNLOAD EXAMIANS APP
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