An Iron weight, suspended by a string, is motionless. The tension in the string is 4,75 newtons What is the mass of the iron weight? A 0.485 kilograms
4.75 kilograms
C 9.65 kilograms
OD 10.0 kilograms
15,5 kilograms

A

0.485 Kg

Explanation:

Since the iron weight is motionless, the magnitude of tension T in the string will be equal but opposite to the magnitude of the weight W.

T = W

Where W = mg

T = mg

Where T = 4.75 N, g = 9.81m/s^2

4.75 = 9.81m

m = 4.75/9.81

m = 0.485 Kg

Therefore, the mass of the iron weight is approximately 0.485 kg

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

it is the second option.