Assume that room pressure is 97.3 kPa. Suppose you started with 15 mL of air in the syringe at room pressure. If the air is compressed to 3.0 mL, what will the new pressure be?

the new pressure is 486.5 kpa

Explanation:

We would apply Boyles law which states that the volume of a gas is inversely proportional to its pressure when the temperature of the gas is held constant.

It is expressed as

P1V1 = P2V2

Where

P1 represents initial pressure of the gas.

V1 = initial volume of the gas

P2 = final pressure of the gas

V2 = final volume of the gas

The gas is the air that is being compressed by the syringe. From the information given,

P1 = 97.3 kPa.

V1 = 15 mL

V2 = 3.0 mL

P2 = ?

Therefore,

97.3 × 15 = 3 × P2

1459.5 = 3P2

P2 = 1459.5/3

P2 = 486.5 kpa

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

i believe the answer would be:

d. violin, clarinet, french horn, and tuba