Physics
The force of friction between two surfaces will increase if:
A layer of lubricant is kept between the two surfaces
The two surfaces are pressed harder
Air gap is created between the two surfaces
Irregularities on both the surfaces are removed
The two surfaces are pressed harder
The friction between two surfaces can be increased if the surfaces are pressed into each other with greater force. The harder the brakes are pushed, the harder the pads get pressed into the discs and the more friction is generated.
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C. Angle
D. Solid Angle
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A. Electric field on current
B. Magnetic field on magnet
C. Electric field on magnet
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The sky appears blue due to
A. Rayleigh scattering
B. Mie scattering
C. Back scattering
D. None of the above
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A. Concave lens
B. Convex lens
C. Convex mirror
D. Concave mirror
Which elements are malleable and good conductors of electricity?
A. Tin and silver
B. Iodine and silver
C. Tin and xenon
D. Iodine and xenon
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A. Reflected
B. Refracted
C. Diffracted
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Mach number is used in connection with the speed of
A. sound
B. aircraft
C. spacecraft
D. ships
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