Two balls are suspended on parallel threads of the same length so that they touch contact each other. The mass of the first ball is

m1 = 0.2kg

and that of the second

m2 =100g

. The first ball is

deflected so that its centre of gravity rises to a height of

4.5cm

and is then released. At what

height will the balls rise to after the collision if: (i) the impact is elastic, (ii) the impact is

inelastic?

Iron reacts with sulfur to form iron sulfide. if 60 grams of iron reacts with sulfur to produce 90 grams of iron sulfide, how much sulfur has been used in the chemical reaction?

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

Adisk with a radius of r is oriented with its normal unit vector at an angle q with respect to a uniform electric field. which of the following would result in an increase in the electric flux through the disk? check all that apply? a. increasing the area of the disk b. decreasing the given orientation angle of the disk c. decreasing the strength of the electric field d. increasing the given orientation angle of the disk, but not exceeding an angle of 90