Three point charges are arranged in an equilateral triangle. the bottom left charge is located at the origin (0.000 m, 0.000 m) and has a charge of +3.00 µc, the bottom right charge is 20.0 cm away at (0.200 m, 0.000 m) and has a charge of −2.00 µc, and the top charge is located at (0.100 m, 0.173 m) and has a charge of +4.00 µc. find the electric field vector (magnitude and direction! ) at the origin, and then use it to calculate the force on the +3.00 µc charge located there.'

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.

The first law of thermodynamics is as follows: ∆u=q-w , which means in a system is equal to added, minus done by the system. the units for these variables are in .