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3 years ago

8

How does the digestive system work with the blood vessels of the circulatory system?

2 answers:

igor_vitrenko [27]3 years ago

7 0

Inhales, digestive system

Elden [556K]3 years ago

7 0

Inhales (breathes in) Oxygen - good for the body - gives it to the Circulatory System to be transported throughout the body through the blood. (1) Digestive System gets nutrients (good) from food and hands it over to the blood and Circulatory System then carries those nutrients where they need to go.

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11. A wire made of silver has coefficient of linear expansion, 29x10-6/k and length of 10m. A square metal plate made of such si

Levart [38]

By using the coefficient of linear expansion, the increase in the length of the metal plate is by 0.015m and in the area is by 0.3074 $m^2$ .

The rate of change in length of a metal per degree change in temperature is known as the coefficient of linear expansion.

Given:

Coefficient of linear expansion, α = 29 x $10^-^6$ /k

Length, L1 = 10m

T1 = 25℃

T2 = 78℃

ΔT = 78 – 25 = 53℃

To find:

Change in length (ΔL) and area (ΔA) of metal plate = ?

Formula:

ΔL = α L1 ΔT

ΔA = A1 2 α ΔT

Calculations:

ΔL = 29 x $10^-^6$ x 10 x 53

ΔL = 0.01537m

ΔA = 100 x 2 x 29 x $10^-^6$ x 53

ΔA = 0.3074 $m^2$

A2 = 100.3074 $m^2$

Result:

The increase in the length and area is by 0.015m and 0.3074 $m^2$ respectively.

Learn more about Coefficient of linear expansion of metals here:

brainly.com/question/14780533

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5 0

1 year ago

Calculate the mass of earth

Roman55 [17]

Answer:

$m=6.85\times 10^{24}\ kg$

Explanation:

The radius of Earth is $6.67\times 10^6\ m$

The density of an object is given by :

$d=\dfrac{m}{V}$

The density of Erth is, d = 5515 kg/m³

Where

m is the mass of the Earth

So,

$m=d\times V\\\\m=\dfrac{4}{3}\pi r^3\times d$

Put all the values,

$m=\dfrac{4}{3}\pi \times (6.67\times 10^6)^3\times 5515 \\\\m=6.85\times 10^{24}\ kg$

So, the mass of the Earth is equal to $6.85\times 10^{24}\ kg$ .

6 0

3 years ago

I need some help as soon as possible

EastWind [94]

8) speed

9)velocity

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3 0

4 years ago

An electric heater rated 600 w operates 6 hours per day find the cast to operate it for 30 days , at rs. 4.00 per unit

djverab [1.8K]

Answer:

Rs. 432*10^3 (In kilowatts per hour)

I hope it will be useful.

3 0

3 years ago

Sound travels fastest through A) space. B) cool air. C) warm air. D) a metal spoon.

Mademuasel [1]

A metal spoon. Because metal travels the fastest

7 0

3 years ago

Read 2 more answers