Without more details, I just have to assume that the 406 km is the displacement ... that is, the straight-line distance between the start point and the end point. If there were any turns, loops, or backtracks during the trip, then this question couldn't be answered, because we don't know the displacement.
a). Average velocity = (406 km) / (7.0 hours) = 58 km/hr West.
According to the requirements stated in the question, I still have to convert this answer to a different unit in order to rightfully claim the full 5-points bounty.
b). (58 km/hour) x (1,000 m/km) x (1 hour / 3600 sec) = 16-1/9 m/sec .
Because of the earths curve and temperature. The temperature in an area depends on the amount of the Sun's energy reaching the surface in that area. The equator tilts closer to the sun than the poles do. I hope this helps!
It is required to find the wavelength of a star that radiated greatest amount of energy. Wein's displacement law gives the relation between wavelength and temperature such that :
The potential energy of a body is defined as the product of mass by gravitational acceleration by height. And it can be calculated by means of the following equation.
