Mr. Smith has a light bulb and a battery. He wants to light up the light bulb, but he needs one more component. What is the
item needed?
a. Power Source
b. Resistor or Load
C. Conductive Wires
d. A switch

What equation is used to calculate the weight of an object on a plant ?

Why do different substances have diffrent properties

Arope has one end tied to a vertical support. you hold the other end so that the rope is horizontal. if you move the end of the rope back and forth with a frequency of 4 hz, the transverse wave you produce has a wavelength of 0.5 m. what is the speed of the wave in the rope?