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Complete Question
There were 100 new cases of syphilis last year in a given population of 100,000 people. At that time, 500 people in this population already had syphilis. The incidence of syphilis in this population is __________.
a. 100 per 100,000
b. 500 per 100,000
c. 1000 per 100,000
d. 5000 per 100,000
Answer:
a. 100 per 100,000
Explanation:
Incidence rate of a population can be defined as the rate at which an disease occurs in a population.
The incidence of a population is calculated as
The number of new cases ÷ The population of the people
From the above question,
The number of new cases = 100
The population of the people = 100,000
The incidence = 100 ÷ 100,000
The incidence of syphilis in the population is 100 per 100,000
Answer:
100 per 100,000
Explanation:
Answer:
split yo ️Troy ️Troy :
Explanation:
Certainly! Here are five examples of situations or phenomena related to air pressure:
1. Weather Systems: High and low-pressure systems in the atmosphere influence weather patterns. High-pressure areas are associated with clear skies and stable weather, while low-pressure areas often bring cloudy, stormy conditions.
2. Barometer: A barometer is an instrument used to measure atmospheric pressure. It can indicate changes in weather conditions. A rising barometer suggests high pressure and fair weather, while a falling barometer indicates low pressure and the potential for storms.
3. Suction Cups: Suction cups work by creating a vacuum between the cup and a surface, causing lower air pressure inside the cup compared to outside. This pressure difference allows the cup to stick to the surface.
4. Scuba Diving: As divers descend underwater, the pressure increases due to the weight of the water above them. They must equalize the pressure in their ears and masks to avoid discomfort or injury.
5. Airplane Flight: Aircraft cabins are pressurized to maintain a comfortable atmosphere for passengers at high altitudes. The pressure inside the cabin is adjusted to simulate conditions at lower altitudes, where oxygen levels are sufficient for breathing.
Answer: The law of mass action suggests that the rate of a chemical reaction is directly proportional to the product of the masses of the reactants. In this, each mass is raised to a power, which is equivalent to the coefficient of that reactant in the chemical reaction.
For example- For the chemical reaction-
aA + bB → C + D
Rate of the reaction α [A]ᵃ [b]ᵇ
Rate of the reaction = k [A]ᵃ [b]ᵇ
where, k = rate constant
a+b = order of the reaction.