D. The effects of pollution can be studied without harming an ecosystem.
Explanation:
The most ethical reason for carrying out a simulation study instead of a direct investigation is the effects of pollution can be studied without harming an ecosystem.
Although he has noble cause for studying the effect of oil leak into the Gul of Mexico, introducing a whooping 10 million liters will even cause more damage to the ecosystem from the ensuing study.
Using a simulation will circumvent this risk and environmental pollution that will ensue.
learn more:
Pollution brainly.com/question/10743354
#learnwithBrainly
Answer:
E
Explanation:
All of the actions play a role in conserving energy. Purchasing local foods reduces the need for transportation, power strips keep a steady energy source, washing with cold water removes the need for a heater (which uses energy), and shorter showers have the same effect as stated before.
Answer: 11 to 16mls
Explanation:
It's obvious, you'll be thinking of African or European swallow; we might consider the West African swallow, or the South African Cave swallow, however, choosing one between these two would be completely arbitrary- and neither is it sufficiently studied to provide the absolute data we need.
Notwithstanding, there is an accepted way to estimate the airspeed of a bird using Strouhal ratio's equation. This states that "the frequency of wingbeats multiplied by their amplitude and divided by the airspeed of the bird provides a semi-constant value." This is known as the Strouhal number and averages between 0.2 and 0.4 for most birds, with a higher number denoting a less efficient flight pattern.
Flight is (for those poor people who we're not opportune to watch it) clearly very efficient, seeming almost effortless. So we’ll go for the lower end of Strouhal numbers in our working, giving us (drumroll please), an airspeed velocity of 11–16 metres per second. That’s 40–60 kilometers per hour.
Answer:
When the chicken bone was placed in the glass of vinegar, the acid in the vinegar dissolved the calcium carbonate so that only collagen was left. Calcium (the mineral in calcium carbonate) is needed to make our bones strong. When there isn't enough calcium, our bones become soft and are more likely to break.
Explanation:
