Two similar waves are traveling through the same medium. Wave A has a frequency that is 3 times that of wave B. How do their wavelengths compare?

λA=λBlambda sub cap A is equal to lambda sub cap b

λA=19λBlambda sub cap A is equal to 1 ninth lambda sub cap b

λA=3λBlambda sub cap A is equal to 3 lambda sub cap b

λA=13λB

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Ineed the answer to question 1 , i’m desperate

The mass of a bowling ball is 10 kg and the mass of a ping pong ball is 0.015 kg. if the two objects are 5 meters apart, what is the gravitational force ?