Physics 2001 NECO Past Questions

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Which statement is NOT correct about molecules?

A. The number of molecules in a unit volume of a solid is greater than that in a unit volume of a liquid or gas.
B. Molecules are made up of atoms
C. The force of attraction between two molecules of a solid is greater than that between two molecules of a liquid or gas
D. Molecules of gases are in regular motion
E. Molecules of a solid vibrate about their mean positions.

View Answer & Discuss (6) NECO 2001

The inside of a vacuum flask is usually coated with silver to reduce heat loss by

A. condensation
B. conduction
C. convection
D. evaporation
E. radiation

View Answer & Discuss (4) NECO 2001

What is the angular velocity of an object in a horizontal circular path of radius 1.5m with a constant speed of 12ms^-1?

A. 1.6 rads^-1
B. 4.0 rads^-1
C. 8.0 rads^-1
D. 16.0rads^-1
E. 32.0 rads^-1

View Answer & Discuss (5) NECO 2001

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A wave is represented by the equation y = 0.5 sin 0.4π(X - 60t), where the distance (X) is measured in centimetres and time (t) in seconds. What is the wavelength of the wave?