How many independent variables can you have in an experiment for it to be valid?

When curium-242 is bombarded with an alpha particle, two products are formed, one of which is a nudge on. what is the other product

Table sugar completely dissolved in water is an example of a?

Avolleyball player hit a ball with a mass of 0.25 kg. the average acceleration of the ball is 15.5 m/s². how much force did the volleyball player apply to the ball? 62.0 n 3.87 n 62.0 m/s² 3.87 m/s²