What are factor affecting resistance?

1 answer:

4 0

Material, eg copper, has lower resistance than steel. length - longer wires have greater resistance. thickness - smaller diameter wires have greater resistance. temperature - heating a wire increases its resistance.

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calculate the mass of displaced water when a piece of 30cm Iceberg with surface area 1000 cm^2 floats on water density of ice is

sweet [91]

Vi = As * h = 1000 * 30 = 30,000 cm^3 = Vol. of the ice.

Vb = (Di/Dw) * Vi = (0.9/1.0) * 30,000 = 27,000 cm^3 = Vol. below surface - Vol. of water displaced.

27,000cm^3 * 1g/cm^3 = 27,000 grams = 27 kg = Mass of water displaced.

3 0

3 years ago

After asking a question, a scientist can form a(n) , which is an idea that may be proved or disproved by an experiment.

DochEvi [55]

Answer:

When scientists have a question, they form a hypothesis, which is an idea that may be proved or disproved by an experiment.

6 0

3 years ago

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What causes melting of material under divergent plate boundaries?

Triss [41]

Melting: as mantle material rise toward the divergent plate boundary the pressure is reduced which causes melting

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3 years ago

If an object were released in space far away from planted or stars and given an initial momentum, describe what would happen to

mamaluj [8]

Strange as it may seem, the object would keep moving, in a straight line and at the same speed, until it came near another object. Its momentum and kinetic energy would never change. It might continue like that for a billion years or more.

Have a look at Newton's first law of motion.

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3 years ago

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A sprinf has a potential energy of 84.08 J and a constant of 342.25 N/m. How far it been stretched? Use potential energy elastic

valina [46]

The spring has been stretched 0.701 m

Explanation:

The elastic potential energy of a spring is the potential energy stored in the spring due to its compression/stretching. It is calculated as

$E=\frac{1}{2}kx^2$