Answer:
there's no pic for options?
A seesaw is an example of a first class lever The fulcrum, which is the part of the lever that does not move, is in the middle. The resistance, which is the weight (person) you are trying to lift is at one end. The effort, which is the force applied to the lever, is the person sitting on the other end.
Answer:
Besides playing various roles in daily life, technology also plays roles in preventing and treating different diseases. Flu can be prevented by the use of technology in several ways:
- Use of web to find out latest vaccines and their availability: Vaccines for flu also called flu shots are recommended by doctors in order t stay away from flu as much as possible, web services are efficient source in this regard that help to search for available vaccines and trend of flue in particular areas.
- Quicker diagnostic results: Technology has developed such rapid diagnostic tests that give results within minutes. Like screening test for qualitative analysis of flu have been made and such tests have been developed that are easy to carry out just by single nasal swab.
- Air filters and UV bulbs: To prevent the germs inside the home or closed environment, use of air filters like HEPA filter and UV light is trending. HEPA (high efficiency particulate air) filter the air at great extent thus preventing the germs to spread, and UV light has characteristic to be antimicrobial so it is also installed to kill pathogenic microbes.
I think you demonstrate friction. Friction, I think.
Answer:
it would be ideal to split the test into 4 different groups
Explanation:
To better test the effects of the drug at different doses, it is important to consider the standard of the scientific method in testing.
Control testing is important in the first group of patients to take no drugs, in the second group of patients taking a placebo, in the third group of patients taking a 300 mg dose of the drug, and finally in the fourth group one dose of 500 mg. This wide range of doses and placebos not only shows better data, but creates a basis for better comparison of the final results.
