Two balls roll to the right. Both have a mass of 2.3 kg. The ball in front (the one on the right) has a speed of 3.0 m s . The ball in the back (the one on the left) has a speed of 4.0 m s . They collide and bounce off each other. After the collision, the ball in back has a speed of 1.1 m s . What is the speed of the front ball after the collision? v r f = m s Round your answer to the nearest hundredth if necessary.

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

Which subatomic particle has a negative charge

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c