2 What is the weight of a man, whose mass is 75kg on earth?
3. What do you understand about negative acceleration?
4. Distinguish distance and displacement.
5. Define sublimation.
Answers
Explanation:
2- It is given that the mass of a man is 75 Kg in earth.
The weight of the man in earth can be calculated by W=mg=75×9.8=735 N.
3- That means that the direction of the acceleration determines whether you will be adding to or subtracting from the velocity. Mathematically, a negative acceleration means you will subtract from the current value of the velocity, and a positive acceleration means you will add to the current value of the velocity.
4- Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
5- Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state
2) It is given that the mass of a man is 75 Kg in earth.
The weight of the man in earth can be calculated by W=mg=75×9.8=735 N.
3) That means that the direction of the acceleration determines whether you will be adding to or subtracting from the velocity. Mathematically, a negative acceleration means you will subtract from the current value of the velocity, and a positive acceleration means you will add to the current value of the velocity.
4) Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
5) Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. ... The reverse process of sublimation is deposition or desublimation, in which a substance passes directly from a gas to a solid phase.
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