3 years ago

You know that there are 1609 meters in a mile. The number of feet in a mile is 5280. How many centimeters equals one inch

1 answer:

4 0

Hello there, and thank you for posting your question here on brainly.

Short answer: 2.54

Why?

No explanation needed.

Hope this helped you! ♥

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agasfer [191]

Answer:

second one is correct that is right

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4 years ago

Two beams of coherent light are shining on the same piece of white paper. with respect to the crests and troughs of such waves,

defon

Answer:

"where crests and troughs have their maxima at the same time"

Crests and troughs are 180 deg out of phase and when they have their maxima at the same time and place, their net contribution will be zero"

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2 years ago

A mechanism which uses mechanical energy to produce electrical energy is known as an) -

ser-zykov [4K]

Electrical generator

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3 years ago

if 100 kilojoules of energy is used to heat 500 grams of water what is the temperature change of the water

Serjik [45]

Answer:

47.8 °C

Explanation:

Use the heat equation:

q = mCΔT

where q is the heat absorbed/lost,

m is the mass of water,

C is the specific heat capacity,

and ΔT is the change in temperature.

Here, q = 100 kJ, m = 0.5 kg, and C = 4.184 kJ/kg/°C.

100 kJ = (0.5 kg) (4.184 kJ/kg/°C) ΔT

ΔT = 47.8 °C

6 0

3 years ago

The resistance (R) of a copper wire varies directly as its length (L). Write this relation as a formula using k as the constant

Drupady [299]

Answer:

Explanation:

According to ohm's law current flowing in a conductor is directly proportional to the voltage applied across two end of conductor.

i.e. $V\propto R$

$V=R I$

where R=resistance

$R\propto L$

$R\propto \frac{1}{d^2}$

whee L and d are length and Diameter

thus $R=k \frac{L}{d^2}$

where k=constant of Variation

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3 years ago