Question

XIX Name the principle used to designe ships and submarines.
Al Archimedes' principle ) taw of gravitation C) Kepler's Law
D) None of the these
XX. An iron nail sinks and a cork floats when placed on the surface of water because density of
cork is
A) Less than the density of water
B) More than the density of water
C)Equal to density of water
D) None of the these
XXI. As the sailor Jumps in forward direction the boat moves backwards. This is due to Newton's
A) First law of motion
c) Third law of motion
B)Second law of motion
D) Universal law of gravitation
XXII. What is the kinetic energy of an object of mass m moving with velocity v?
A) mv
B) mgh
C) my?
D) ma
XXIII. The energy possessed by a body due to its change in position or shape is called the
A) Potential Energy
B) Kinetic Energy
C) Power
D) Inertia​

Answer 1

Answer:

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Explanation:

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Answer 2

1 a 2 c 3 a 4a 5 d may be my answer is right