When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's kinetic energy to internal energy. If
a 1500 kg automobile traveling at 32 m/s comes to a halt after its brakes
are applied, how much can the temperature rise in each of the four 3.5
kg steel brake disks? Assume the disks are made of iron (c = 448 J/kg•°C)
and that all of the kinetic energy is distributed in equal parts to the internal
energy of the brakes.

compass can be used day and night, cloudy or sunny

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.  

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray