Give sure answers : ) 30 pts
check all that apply. electromagnetic waves are:

 mechanical waves
 transverse waves
 pressure waves
 move perpendicular
 move parallel
 frequency is directly related to speed
 frequency is inversely related to wavelength
 wavelength is directly related to speed
 require a medium
 transfer energy

If the force on an object is in the negative direction, the work it does on the object must be [2 points a) negative. b) positive c) the work could be either positive or negative, depending on the direction the object moves

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?