Students are experimenting with a substance that they think can be added to soil to increase the number of flowers a certain plant will make. they set up 20 pots of soil, each planted with the same type of seed. they divide the pots into two groups and add 15 drops of the substance to pots in one group and only 10 drops to pots in the other group. after the plants grow for four weeks, the students count how many flowers each plant has made.

what does this experimental investigation lack?

a control group
an independent variable
a dependent variable
a procedure

troll answers will be reported

Which situation will have the highest resistance? a.long wire and high temperatureb.short wire and high temperaturec.long wire and cold temperaturedshort wire and low temperature

High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?