A 5.00 kg mass is at the origin. A 7.00 kg mass is located at x = 0.600 m,
and a 4.00 kg mass is at x = 0.900 m.
What is the net gravitational force on
the 5.00 kg mass?

The de broglie relation λ=h/p can be rewritten in terms of the wave number k as p=kℏ. recall that wave number is defined by k=2π/λ. using the fact that λ=v/f, find the wave numbers k1 and k2 corresponding to frequencies f1 and f2. express your answer as two expressions

Asteady current of 1 ais flowing through a conducter calculate the number of electrons that flows through conductor in 1second

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?