3 years ago

Please Please Please Can Help Me On This Question!!!!! I Give Thanks!!!!

1 answer:

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I'm doing questions in grade 10 math working on imperial system how should I give my answers in decimals or fraction it's an adult learning experience

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Which of the following is a true statement about energy?

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<span>B. Energy is never created nor destroyed.
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a man stands on weighing scale in a lift which carries him upwards with acceleration, what happen please tell

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He gets heavier due to the upward acceleration of the lift

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4 years ago

A 100 kilogram person acquires a velocity of 15 meters per second down a ski slope.What is the skier's kinetic energy?

azamat

11250J

Explanation:

Given parameters:

Mass of the person = 100kg

Velocity = 15m/s

Unknown:

Kinetic energy = ?

Solution:

The kinetic energy of a body is energy due to the motion of the body.

Kinetic energy = $\frac{1}{2}$ m v²

m is the mass of the body

v is the velocity

Substituting the parameters:

K. E = $\frac{1}{2}$ x 100 x 15² = 11250J

Learn more:

Kinetic energy brainly.com/question/6536722

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3 years ago

A cylindrical storage tank has a radius of 1.35 m. When filled to a height of 3.45 m, it holds 14,014 kg of a liquid industrial

Kruka [31]

Answer:

709.93 kg/m³

Explanation:

Density: This can be defined as the ratio of the mass of a body to the volume of that body. The S.I unit of density is kg/m³

From the question above,

D = m/v.............................. Equation 1

Where D = density, m = mass, v = volume.

Note: The volume of the liquid is equal to the volume of the height occupied by the liquid in the container

Since the tank is cylindrical,

v = πr²h........................ Equation 2

Where r = radius of the the tank, h = height of the liquid in the tank

Substitute equation 2 into equation 1

D = m/(πr²h)............... Equation 3

Given: m = 14014 kg, r = 1.35 m, h = 3.45 m, π = 3.14

Substitute into equation 3

D = 14014/(3.14×1.35²×3.45)

D = 14014/19.74

D = 709.93 kg/m³

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3 years ago

Before beginning an experiment Mrs. Wilson warns her science class not to drop the bar magnets on the floor what is the most lik

Ainat [17]

Answer:

They could lose their magnetism if they are dropped too hard or banging against something (the ground)

Explanation:

the domains may bump out of alignment. hope this helps ! :)

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