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If the density of a brick is 2 kg/L, then what is the mass of 5 L of bricks?

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

Of is j/kg·k. if a 2.6 kg of isk to k,is ?