A5 kg brick is dropped from a height of 12m on a spring with a spring constant 8 kn/m. if the spring has unstretched length of 0.5m, find: a) the shortest length the spring will be compressed before recoil, and
b) the final length of the spring once the whole system become static.

Which subatomic particle has a negative charge

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?