Name 4 differences between chemical and physical changes

What does average speed mean

How much fencing material does fiona need in meters?

Which of the following is a likely outcome of a failed experiment

Which characteristic is least likely to be used for predicting percent dissociation of a solid in a liquid?

A rock is dropped into a graduated cylinder containing 40mL of water. the new volume is 47mL. What is the volume of the rock? a) 4ml b) 47ml c) 7ml d) 87ml e) 11ml I thibk it is 7ml am I correct?

Which microscope came out first

Which exerts greater pressure on the floor-standing flat-footed or standing on tiptoe? on tiptoe, because the force acts over less area on tiptoe, because the force acts over more area flat-footed, because the force acts over more area flat-footed,

1. Sara tells Michael she is 160 centimeters tall, while Michael says he is 60 inches tall. If there are 2.54 centimeters in an inch, who is taller

How do you tell if a compound is polar or non polar

What two ions are central to the arrhenius definitions of acids and bases?