1. What is B marking?

A Wavelength
Peak
Amplitude
Trough

A20 cm long spring is attached to a wall. the spring stretches to a length of 22 cm when you pull on it with a force of 100 n. what is the spring constant

Mr. polifka does a demonstration in science class. he holds an unlit match six inches above a candle flame. after a while, the match bursts into flame.

Alamp draws a current of 0.50 a when it is connected to a 120 v source? what is the resistance of the lamp?