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2 years ago

Why is it hard to breathe when you go higher up

1 answer:

8 0

When we breathe in air at sea level, the atmospheric pressure of about 14.7 pounds per square inch (1.04 kg. per cm.2) causes oxygen to easily pass through selectively permeable lung membranes into the blood. At high altitudes, the lower air pressure makes it more difficult for oxygen to enter our vascular systems.

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PLEASE HELP! **

Eduardwww [97]

It moves to 56 km per hours

8 0

3 years ago

Galileo attempted to measure the speed of light by measuring the time elapsed between his opening a lantern and his seeing the l

Dafna11 [192]

Answer:

The distance is $2.58\times10^{7}\ m$ .

Explanation:

Given that,

Time $\Delta t = 0.2\ s$

The velocity is no more than a 14 % error in the speed of light.

So,

Velocity $v= c\times 86\%$

We need to calculate the distance

Using formula of speed

$v = \dfrac{d}{t}$

$d = v\times t$

Where, v = speed

d = distance

t = time

Put the value into the formula

$d = 3\times10^{8}\times\dfrac{86}{100}\times0.2$

$d=516\times10^{5}\ m$

We know that,

The one side distance d' is

$d'=\dfrac{d}{2}$

$d'=\dfrac{516\times10^{5}}{2}$

$d'=2.58\times10^{7}\ m$

Hence, The distance is $2.58\times10^{7}\ m$ .

5 0

2 years ago

Importance of studying physics

dybincka [34]

Physics contributes to the technological infrastructure and provides trained personnel need to take advantage of scientific advances and discoveries.

Physics is an important element in the education of chemists, engineers and computer scientists as well as practitioners of the other physical and biomedical sciences .

4 0

3 years ago

A car starts from rest and accelerates at 2.0 m/s2 for 10 seconds. What is the car's displacement at the end of 10 seconds?

makvit [3.9K]

Answer:

100m

Explanation:

Find the acceleration first

Then plot a simple speed time graph

7 0

3 years ago

Which instrument would play lower tones?

Elanso [62]

An upright base / 6ft long

8 0

3 years ago