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Molodets [167]
3 years ago
14

3. Ms. Johnson can bench press 150 kg from 0.7 m from the ground to 1.5 m above the ground. a. How much weight (not mass) did Ms

. Johnson lift? Put down Givens, Solving For, Equation, Substitution, Answer with Units
b. How much power did she use if she lifts the weights in 10s? Put down Givens, Solving For, Equation, Substitution, Answer with Units
Physics
1 answer:
miss Akunina [59]3 years ago
5 0

Explanation:

a. Given:

m = 150 kg

a = 9.8 m/s²

Solving for: F

Equation: F = ma

Substitution: F = (150 kg) (9.8 m/s²)

Answer: F = 1470 N

b. Given:

y₀ = 0.7 m

y = 1.5 m

F = 1470 N

t = 10 s

Solving for: P

Equation: P = F Δy / Δt

Substitution: P = (1470 N) (1.5 m − 0.7 m) / 10 s

Answer: P = 117.6 W

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Why does hitting a magnet with a hammer cause the magnetism to be reduced?
Katarina [22]

Hitting a magnet with a hammer cause the magnetism to be Physical disruption and vibration damage the material's order, demagnetizing it.

<h3>Explanation:</h3>

There are numerous methods for demagnetizing a magnet.

A magnet, as we know, has magnetic moments, which are the arrangements of molecules in a specific direction.

The hammer causes the magnetic poles of the magnet to point in opposite directions, causing the magnet to bend.

When we repeatedly hammer on a magnet, the magnetic dipoles inside the magnet are released from their ordered configuration.

Magnetism is known to be caused by the presence of magnetic moments.

As a result, when we hammer it, the dipoles are perturbed, lose their orientation, and magnetic moments cease to exist. As a result, the magnet will become demagnetized.

<h3>What is Magnetism?</h3>

The force that magnets use to either attract or repel one another is known as magnetism.

Electric charges in motion are what generate magnetism. Every substance is made of small particles known as atoms.

Electrons, which are charged particles, are found in every atom. Electrons spin like tops around an atom's nucleus, or center. Their mobility causes an electric current to flow, causing each electron to act as a miniature magnet.

Another strongly magnetic substance must enter the magnetic field of an existing magnet in order to be magnetized. A magnet's magnetic field is the area of magnetic force that surrounds it.

An electric current can magnetize some compounds.

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8 0
1 year ago
An empty container has a mass of 3 g. When it is filled with 5 cm3 of a liquid,
IrinaK [193]

Answer:

THE MASS OF THE LIQUID IS 22.5 g

Explanation:

Density = 0.180 g/cm3

Side length = 5 cm

Mass = unknown

To calculate the mass of the liquid, we use the formula:

Mass = density * volume

Volume of a cube or cuboid container = l^3

Volume = 5 ^3 = 125 cm3

So therefore, the mass of the liquid is:

Mass = 0.180 * 125

Mass = 22.5 g

In conclusion, the mass of the liquid in the container is 22.5 g

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3 years ago
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Explanation:

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3 years ago
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A volcano erupts quietly if it's magma is low on silica. Low silica magma will be very thin, runny, and will flow easily, so the gases in the magma will bubble out gently. Hope this helps!:)
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4 years ago
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