Answer: the answer is D.Heat from the engine under the hood transfered to the snow, melting it.
Explanation: Heat always transfers from warmer objects to cooler objects. For example, if snow is on the hood of your car, as the engine warms up, heat will be transfered from the engine to the snow, melting the snow and cooling the engine.
Answer:
As the warmer air over the equator rises, colder air from the poles rushes toward the equator to take its place. Global winds push air masses around Earth and bring changes in the weather. In the United States, global winds called the prevailing westerlies push air masses from west to east.
Explanation:
Answer:
4Al + 3O2 + heat ------> 2Al2O3
Explanation:
It is endothermic reaction.
Answer:
a)801KJoules
b)The woman must climb stairs for an equivalent of 1.57km
Number of stairs=7850 stairs
Explanation:
a)We use the conversion between Joules and Kcal:
4184Joules=1Kcal
540Kcal*(1484Joules/1Kcal)=801KJoules
b)The physical Work must be equal to the food energy

The woman must climb stairs for an equivalent of 1.57Km
For example if an stair measure 20cm=0.2m
Number of stairs=1.57km/0.2m=7850 stairs
The star is moving toward the earth.
It is due to the phenomenon of the Doppler shift.
The <u>Doppler effect</u>, commonly referred to as "Doppler shift," is the <u>change in the wavelength </u>or frequency of waves as a result of an observer's motion in relation to the wave source.
It is possible to see this<u> apparent wavelength </u>change in the visible light emitted by stars and galaxies.
As a result, a star moving toward Earth appears to emit light with a shorter <u>wavelength</u> than a light source that is stationary. It is known as blueshift because <u>shorter wavelengths</u> cause the spectrum to shift toward the <u>blue end</u>.
While a star traveling away from us appears to shift its light towards longer wavelengths. Astronomers refer to this as redshift since it is closer to the <u>red end of the spectrum.</u>
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As the spectrum of a particular star shows the hydrogen line appearing at a shorter wavelength of 480 nm in comparison to the laboratory measurements, that show the same hydrogen lines at a greater wavelength of 500 nanometers, that’s why we conclude that the star is moving toward earth.
Learn more about Doppler shift here brainly.com/question/23841569
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