To solve this problem, it is necessary to apply the concepts related to Work according to the Force and distance, as well as the concepts related to energy lost-or gained-by heat. Mathematically the energy corresponding to heat is given as:

Where,
m = mass
= Specific heat
= Change in Temperature
At the same time the Work made by the Force and the distance is given as:

As the force is applied at an angle of 30 degrees, the efficient component would be given by the vertical then the work / energy would be determined as:



Now this energy is used to heat the aluminum. We can find the change at the temperature as follow:



Therefore the correct answer is B.
Red shift in the spectrum of a star is always taken to mean that the source of the light is moving away from us.
That's the whole basis for the notion of the expanding universe, since we don't know of any other mechanism that can shift light toward longer wavelengths.
Alpha radiation, i just took a quiz and this was the answer, hope it helps :)
First half:
50 km at 50 km/hr ... 1 hour
Second half:
50 km at 100 km/hr ... 1/2 hour
Total distance = 100 km
Total time = 1.5 hours
Average speed = (100 km) / (1.5 hrs)
Average speed = 66 and 2/3 km/hr
Average velocity = 66 and 2/3 km/hr East