Which phrase describes an example of a model? -a microscope that is used to observe a cell
-a volcano that can explode made for a science fair project
-a review paper that explains how a plant species grows
-a news report that communicates information about climate change

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

A2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kn. what is the frequency of the fundamental mode of vibration of this wire?

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point