3 years ago

1. (a) List Ten (10) examples each of vector and scalar quantities with their units of

1 answer:

6 0

Answer:

Examples of scalar quantities include time , volume , speed, mass , temperature , distance, entropy, energy , work , length

Example of vector quantities include acceleration , velocity , momentum , force , increase and decrease in temperature , weight ,velocity, acceleration, momentum and Electric field

Explanation:

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According to the law of conservation of mass does the total number of atoms change during aerobic respiration

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3 years ago

An ice skater can change the rate of their spin by moving their arms into and away from their body without any other forces or t

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Answer:

Angular momentum is conserved if there are no external forces

P1 = P2

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explain why astronauts around the earth either in spaceship, a space station, or on a spacewalk appear to be weightless but are

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Answer:

Zero gravity

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Astronauts around the earth either in spaceship, a space station or on a space walk appear to be weightless because of the zero gravity in such environment.

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Weight = mass x acceleration due to gravity

In a place where acceleration due to gravity is 0, the weight would be zero and a person would appear to be weightless.

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3 years ago

An object moves 12 m to the right. If its acceleration was 2 m/s and its final velocity is 25 m/s, find its initial velocity.

scoundrel [369]

Explanation:

by the formula, v²-u²=2aS

S=12m, a=2m/s², v=25m/s, u=?

v²-u²=2aS

25²-u²=2×2×12

-u²=48-625

-u²=-577

u²=577

u=√577

u = 24.02m/s

hope this helps you.

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3 years ago