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3 years ago

why do a circulatory system is important in meeting the needs of all cells throughout an animals body

1 answer:

3 0

The circulatory system is important in meeting the needs of all cells in the body because it offers means of transport by which cells obtain the materials needed to live and function. The functions of the circulatory system by which the cells are supported include: 1. Respiration- oxygen is delivered to the cells and carbon dioxide is removed from them. 2. Nutrition- nutrients for energy are supplied to every cell in the body. 3. Waste removal- metabolic waste products are taken away before they accumulate and become harmful to the cells. 4. Cellular communication- hormones are transported to the cells and organs that need them for proper functioning. 5.Thermoregulation- As blood circulates, it keeps body temperature balanced and thus cells are able to carry out processes well.

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A horizontal 2.00\ m2.00 m long, 5.00\ kg5.00 kg uniform beam that lies along the east-west direction is acted on by two forces.

Sunny_sXe [5.5K]

Answer: $240\ rad/s^2$

Explanation:

Given

Length of beam $l=2\ m$

mass of beam $m=5\ kg$

Two forces of equal intensity acted in the opposite direction, therefore, they create a torque of magnitude

$\tau =F\times l=200\times 2=400\ N.m$

Also, the beam starts rotating about its center

So, the moment of inertia of the beam is

$I=\dfrac{ml^2}{12}=\dfrac{5\times 2^2}{12}\\\\I=\dfrac{5}{3}\ kg.m^2$

Torque is the product of moment of inertia and angular acceleration

$\Rightarrow \tau=I\alpha\\\\\Rightarrow 400=\dfrac{5}{3}\times \alpha\\\\\Rightarrow \alpha =240\ rad/s^2$

7 0

3 years ago

What happens when you place two magnets close together.

wlad13 [49]

They attract and stick together

3 0

3 years ago

Two hockey pucks are sliding along the ice, towards the same goal, one directly in front of the other. The hockey puck in front

grandymaker [24]

Answer: A.9.2m/s

Explanation:

6 0

3 years ago

Classify each action as a cause or an effect of climate change. Fossil fuels burn. Glaciers melt. Climates change. Rain falls in

Goryan [66]

Fossil fuels burn: cause
Glaciers melt: effect (mostly; the melting ice caps are a positive feedback loop of sorts)
Climates change: effect
Rain falls in unusual amounts: effect
Cities become more industrialized: cause
Human population grows worldwide: cause

8 0

3 years ago

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Microwave ovens emit microwave energy with a wavelength of 12.4 cm. what is the energy of exactly one photon of this microwave r

Leni [432]

<span>Formula- E = hc/ {wavelength} Given in quation-wavelength=12.4 cm We know the value of h and c. h=6.626 * 10^-34 Js c= 2.997 * 10^8 m/s wavelength=12.4 cm converted to 0.124 m E = [ 6.626 * 10^-34 Js * 2.997 * 10^8 m/s ] / 0.124 m E = 1.60 * 10^-24 J 1.60 * 10^-24 J of energy of exactly one photon of this microwave radiation have.</span>

5 0

3 years ago

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