Physics, 29.12.2019 14:31 tiarafaimealelei

Suppose that the same amount of heat is added to two 10.0-g blocks of metal, both initially at the same temperature. one block is gold metal, and one is iron metal. which block will have the greater rise in temperature after the addition of the heat?

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How much a substance increase its temperature due to heat transfer depends on its specific heat.

The specific heat is the amount of heat required to increase the temperature of one mass of substance in 1 °Celsius.

The lower the specific heat the more the substance change its temperature with a given amount of heat, the greater the specific heat of the substance the lesser the change of temperature with the same amount of heat.

Then, to predict which of the two blocks will have the greater rise you need to compare the specific heats of the metals.

From tables, the specific heat of gold is 0.129 J/g°C and specific heat of iron is 0.450J/g*°C.

Then, gold will raise more its temperature than iron, after the addition of the same amount of heat.

Answer from: Quest

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.

Answer from: Quest

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.

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