Babylon
India submerged bodies
Greek
Microscope
Answer:
1638.225ms-1
Explanation:
Mass of block= 16.1 Kg
Mass of bullet = 0.08Kg
Initial velocity of block= 0ms-1
Initial velocity of bullet= ????
Final velocity of bullet and wood= 8.1 ms-1
From Newton's third law:
Momentum before collision= momentum after collision
MAUA + MAUB= V(MA +MB)
(0.08×UA) + (16.×0)= 8.1(0.08+16.1)
0.08UA= 131.058
UA= 1638.225ms-1
The correct options are:
<span>B. Radiation is heat flowing in waves.
C. Conduction is heat flowing between two objects that are touching each other.
In fact, radiation is heat transferred by electromagnetic waves, while conduction is the heat transfer between touching objects (the particles of one object collide with the particle of the other object, and so heat is transferred via the transfer of kinetic energy between the molecules).
Instead, option A is wrong (because conduction </span>is the heat transfer between touching objects) and option D is wrong because convection is the heat flowing when a liquid or a gas carries the heat.
The gravitational force between two objects is given by:
F = GMm/r²
F = force, G = gravitational constant, M and m are the masses, r = distance between the objects.
The force is dependent on only the masses of the objects and the distance between them. It is not dependent on the temperature of the objects.
Choice B
Answer:
A force is a push or pull that acts on an object.
:)