Neco 2022 Physics Questions and Answers (100% Verified) Theory and Objectives Expo/Runs

Neco 2022 Physics Questions and Answers (100% Verified) Theory and Objectives Expo/Runs

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Neco 2022 physics Questions and Answers

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(2)
-TABULATE-
SCALAR QUANTITIES
(i) They have magnitude but no direction.
(ii) Scalars are added by ordinary algebraic methods.

VECTOR QUANTITIES
(i) They have both magnitude and Direction.
(ii) Vectors are added by Geometrical methods.

(2b)
R²=3²+4²
=9+16
=25

R=✓25
R=5N

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(3)
(i) The principle of floatation states that when a body floats with its volume partially above the liquid surface, the quantity of the liquid displaced by the body is equal to the quantity of the submerged portion of the body. As the body is in equilibrium, the buoyant force acting on the body must be equal to its weight.

(ii)
– Gravity (pulls object downward)
– Buoyant force (pushes object upward). The buoyant force is equal to the weight of the volume of water displaced by the object.

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(7i)
{PICK ANY ONE}
(i) The angle between the incident ray and the normal is equal to the angle between the reflected ray and the normal.
(ii) The incident ray, the normal and the reflected ray are all in the same plane.
(iii) The incident ray and the reflected ray are on different sides of the normal

(7ii)
{PICK ANY TWO}
(i) Colorimeter
(ii) spectrophotometer
(iii) Periscope
(iv) kaleidoscope

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(12ai)
{PICK ANY TWO}
(i) It makes walking and running possible.
(ii) It enables gripping of belt in machines possible.
(iii) It enables nails to stay in the wall when driven.

(12aii)
{PICK ANY TWO}
(i) It always resists the motion, so extra energy is required to overcome it.
(ii) It causes wear and tear of machines.
(iii) It decreases the life expectancy of moving parts of vehicles.

Since friction is very useful in some cases while harmful in some cases, friction is called a necessary evil.

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