Three source charges are placed in the coordinate. Q1 is located at (0,4cm) and has a charge of +8microC. Q2 is located at (0,0) and has a charge of +5microC. Q3 is located at (3cm, 0) and has a charge of -4microC. Calculate the electric field (x and y components) at the point (3cm, 4cm).

What are two different ways you could find the value of a? explain these methods.

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.

Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.