Physics, 09.10.2019 09:20 allison9746

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

Answers: 3

Show answers

Another question on Physics

Physics, 22.06.2019 04:10

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).

Answers: 2

Answer

Physics, 22.06.2019 05:30

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

Answers: 1

Answer

Physics, 22.06.2019 13:40

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.

Answers: 2

Answer

Physics, 22.06.2019 23:40

Acar jack with a mechanical advantage of 6 needs to produce an output force of 600 n to raise a car. what input force is required? 6 n 100 n 600 n 3,600 n

Answers: 2

Answer

You know the right answer?

Students are experimenting with a substance that they think can be added to soil to increase the num...

Questions