4. Three identical springs A, B and C of negligible weight are arranged as shown the figure below. A
معمموهم
6
If C stretches by 3cm and bar xy is assumed to be weightless. Determine
(i) the spring constant.
(2mk
(2ml
(ii) the extension in A.

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.)

The energy equivalent of the rest mass of an electron is

Because atoms of elements in the same group of thbecause atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t fe periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t f