Answer: Option (C) is the correct answer.
Explanation:
Minerals are inorganic substances which have certain characteristic shape or structure along with homogeneous chemical composition.
It is not necessary that a mineral should be formed under the ground.
Substances which have carbon atoms in their structure are called organic compounds. The structure of wood has carbon atoms attached thus, wood is an organic compound.
Therefore, we can conclude that common salt is a mineral because it has a definite crystal structure but wood is not a mineral because it is organic.
The minimum amount of force needed to move the ball is 15N
Darker is warmer C. Black objects.
Answer:
Explanation:
The acceleration of the train is given by:
where:
u = 5 m/s is the initial velocity of the train
v = 45 m/s is the final velocity of the train
t = 8 s is the time taken for the train to increase the velocity
Substituting numbers into the formula, we find
