Plane 1 leaves city a at 7 am and flies at a speed of 250 mph in a straight line towards city b, located 1000 miles north of city a. plane 2 leaves city c located 300 miles east and 400 miles north of city a at 7: 30 am and flies west at a speed v mph. the planes fly at the same altitude. for which value of v do they collide ?

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

The movement of electrons between atoms is called an