A pilot ( with a mass of m ) in an aircraft follows a vertical circular motion of radius 2.70 km at a constant speed of 225 m/s. If the normal force acting on the pilot at the bottom of the circle is 2082 N, calculate m.

15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?

An ideal polarizer with its transmission axis rotated 30 degrees to the vertical is placed in a beam of unpolarized light of intensity 10w/m^2. after passing through the polarizer, what is the intensity of the beam? a. 8.7 w/m^2 b. 7.5 w/m^2 c. 5.0 w/m^2 d. 10 w/m^2 e. 2.5 w/m^2

Which transition by an electron will release the greatest amount of energy? oa ob oc od