A100 m cable is stretched from the ground to the top of a pole. if the angle of the cable with the ground is 10 degrees, how high is the pole?
a. 17.4 m
b. 90 m
c. 98.5 m
d. 110 m

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

Photons with the highest energy have the longest period

See the attachment and solve question 5th