accounting73
11.07.2019 •
Chemistry
Vanessa is conducting an experiment to see how exposure to different types and amounts of light affects the growth of plants. her results are shown in the data table below. light source type of plant growth (centimeters) sunlight pea plant 1.09375 . partial sunlight daffodil 0.81250 . artificial light lima bean plant 0.78125 . no light sunflower 0.18750 . did vanessa make an error in the design of her experiment? a. no; vanessa designed her experiment correctly. b. yes; there are too many manipulated variables in her experiment. c. yes; plants cannot grow in artificial light. d. yes; vanessa should have measured with customary units.
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Ответ:
B. Yes; there are too many manipulated variables in her experiment.
•She should have limited herself to one type of plant and one light intensity to determine the effect of light source.
•She should have limited herself to one type of plant and one light source to determine the effect of light intensity.
Plants can grow in artificial light. Vanessa’s experiment with lima beans showed that plants can grow in artificial light.
Her units of measurement would have no effect on her results
Ответ:
(since the temperature is changing a change in °c is the same as a change in k)
m x h x δt
= 75g x 0.45j/g/k x 6.0 δt
= 202.5 j of heat.