Vary the distance between an object and your spoon to try to estimate the focal length of the spoon. Explain what principles you use in estimating the focal length.

Which one of the following research methods can show cause and effect

Aturntable that spins at a constant 74.0 rpm takes 3.10 s to reach this angular speed after it is turned on. find its angular acceleration (in rad/s2), assuming it to be constant, and the number of degrees it turns through while speeding up.

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.