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Sedaia [141]
3 years ago
8

estimate the number of breaths taken by a human being during an average lifetime. (we estimate an average respiration rate of ab

out 10 breaths per minute and a typical life span of 70 years.)
Physics
1 answer:
Vinvika [58]3 years ago
8 0

Answer:

3.679 × 10^{8}

Explanation:

Let's assume that average lifespan for normal human being is 70 years.

In 70 years there are 365 days in each year.

70 years = 70 × 365 days

In one day there are 24 hours.

70 years = 70 × 365 × 24 hours

In one hour there are 60 minutes.

70 years = 70 × 365 × 24 × 60 minutes

we estimate an average respiration rate of about 10 breaths per minute. ... (Given)

Thus, for 70 years number of breath are,

n = 70 × 365 × 24 × 60 × 10

n = 3.679 × 10^{8}

Hence, estimate number of breath over a period of life is 3.679 × 10^{8}.

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nadya68 [22]

Answer:

D: It shows that Frida Kahlo used art to cope with her pain.

Explanation:

Within the text given it shows her emotions being lonely, immobile and in pain. But it all shows her asking her father for art which states that art is her sort of relief and happy place.

8 0
2 years ago
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The natural force that causes you to lose power as you climb a hill is known as inertia.
Juliette [100K]
Yeah your answer is correct

7 0
3 years ago
Read 2 more answers
A 20 kg wagon is rolling to the right across a floor. A person attempts to catch and stop the crate and applies a force of 70 N,
Serggg [28]

Answer:

1.736m/s²

Explanation:

According to Newton's second law;

\sum F_x = ma_x\\

Fm - Ff = ma_x\\ where;

Fm is the moving force = 70.0N

Ff is the frictional force acting on the body

Ff = \mu R\\Ff = \mu mg\\

\mu is the coefficient of friction

m is the mass of the object

g is the acceleration due to gravity

a is the acceleration/deceleration

The equation becomes;

Fm - Ff = ma_x\\Fm - \mu mg = ma\\

Substitute the given parameters

Fm - \mu mg = ma\\70 - 0.18(20)(9.8) = 20a\\70-35.28 = 20a\\34.72 = 20a\\a = \frac{34.72}{20}\\a =  1.736m/s^2\\

Hence the deceleration rate of the wagon as it is caught is 1.736m/s²

7 0
3 years ago
Two speakers, one directly behind the other, are each generating a 280-Hz sound wave. What is the smallest separation distance b
Annette [7]

Answer:

1.21m

Explanation:

If two speakers are generating a frequency of 280Hz, the smallest separation distance between the speakers that will produce destructive interference at a listener standing in front of them is also known as the wavelength of the sound wave generated.

Using the expression;

Velocity v = frequency f × wavelength ¶

Given frequency = 280Hz, speed of sound v = 338m/s

Substituting this data's in the expression given to get the wavelength will give;

¶ = v/f

¶ = 338/280

¶ = 1.21m

The smallest separation between the speakers that will produce the interference is 1.21m

4 0
3 years ago
The length of the mercury thread is found to be 4cm and 24cm at ice point and steam point respectively on an ungraduated thermom
BabaBlast [244]

Answer:

The difference between ice and steam in Celsius (Centigrade) is 100 deg.

So the difference between and 4 cm and 24 cm of the thread corresponds to 100 deg C.

So 8 cm is 4 cm greater than the ice point

4 cm / 20 cm = 1/5     since the steam point and the ice point are 20 cm apart

Then 1/5 * 100  deg C = 20 deg C   the requested temperature

6 0
3 years ago
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