2 years ago

Plz di all plz i will give brainest and thanks to best answer do it right

Physics

1 answer:

Inga [223]2 years ago

7 0

Answer:

area 4

Explanation:

area 4 has low pressure

You might be interested in

Waves disturb ____, but do not transmit it

Agata [3.3K]

Answer:

energy

Explanation:

im sure

5 0

2 years ago

In a car engine, what type of energy is released at a high level, leading to inefficiency?

spin [16.1K]

Thermal energy is the answer

7 0

2 years ago

You are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you from behind and you perceive

Irina-Kira [14]

Answer:

Explanation:

In the first case you can use the expression for the Doppler effect when the source is getting closer and getting away

$f'=f(\frac{v}{v-v_{s}})$ ( 1 )

$f''=f(\frac{v}{v+v_s})$ ( 2 )

f' = perceived frequency when the source is getting closer

f'' = perceived frequency when the source is getting away

f = source frequency

v = relative speed

vs = sound speed

by dividing (1) and (2) you have

$\frac{f'}{f''}=\frac{f}{f}\frac{\frac{v}{v-v_s}}{\frac{v}{v+v_s}}=\frac{v+v_s}{v-v_s}\\\\f'v-f'v_s=f''v+f''v_s\\\\v(f'-f'')=v_s(f''+f')\\\\v=v_s\frac{f''+f'}{f'-f''}=(340\frac{m}{s})\frac{1370Hz+1330Hz}{1370Hz-1330Hz}=67.5\frac{m}{s}$

but this is the relative velocity, you have that

$v=v_{sir}-v_{car}\\v_{sir}=v+v_{car}=67.5\frac{m}{s}+35\frac{m}{s}=102.5\frac{m}{s}$

a. hence, the speed of the police car is 102.5m/s

6 0

2 years ago

What are the 2 factors that affect population size? Explain your answer.

dmitriy555 [2]

The two factors that increase the size of a population are natality, which is the number of individuals that are added to the population over a period of time due to reproduction, and immigration, which is the migration of an individual into a place.

5 0

2 years ago

Read 2 more answers

3. A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds.

kozerog [31]

Answer:

10 km/s^2

Explanation:

Acceleration = velocity/time

a= 70km/7s

= 10km/s^2

8 0

2 years ago