In the following reaction, what is the ratio of zinc chloride (ZnCl2) to potassium chloride (KCl)? 2K(MnO4) + ZnCl2 → Zn(MnO4)2 + 2KCl 10.

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.

You walk 45 m to the north, then turn 90° to your right and walk another 45 m how far are you from where you originally started? a.45 m b.41 m c.85 m d.64 m