All categories

3 years ago

8) What kind of circulation carries blood to all organs and systems?

Physics

2 answers:

vivado [14]3 years ago

8 0

The heart pumps the blood

Roman55 [17]3 years ago

5 0

There isn’t one blood circulatory system in the human, but two, which are in fact connected. The systemic circulation provides organs, tissues and cells with blood so they get oxygen and other vital substances. The pulmonary circulation is where the fresh oxygen we breath in enters the blood.

You might be interested in

The characteristics that follow are characteristics of two of Galileo's surviving double-convex lenses. The numbers given are ma

forsale [732]

Answer:

Explanation:

L 1: front radius 950 mm, rear radius 2700 mm, refractive index 1.528;

We shall use lens maker's formula , that is

1/f = (μ-1) ( 1/R₁ - 1/R₂) , μ is refractive index of the lens , R₁ and R₂ are radius of curvature of front and rear curved surface.

1/f₁ = (1.528-1)( 1/950 + 1/2700)

f₁ = 1331 mm

L2: front radius 535 mm, rear radius 500 mm, refractive index 1.550.

1/f₂ = (1.550-1)( 1/535 + 1/500)

f₂ = 470 mm

largest angular magnification possible

= f₁ /f₂

= 1331 / 470

= 2.83 ( approx )

Length between two lenses

=1331 +470

= 1801 mm

= 1.8 m Ans

6 0

3 years ago

How does the input distance of a single fixed pulley compare to the out- put distance?

ololo11 [35]

A pulley is another sort of basic machine in the lever family. We may have utilized a pulley to lift things, for example, a banner on a flagpole.

<u>Explanation:</u>

The point in a fixed pulley resembles the support of a lever. The remainder of the pulley behaves like the fixed arm of a first-class lever, since it rotates around a point. The distance from the fulcrum is the equivalent on the two sides of a fixed pulley. A fixed pulley has a mechanical advantage of one. Hence, a fixed pulley doesn't increase the force.

It essentially alters the direction of the force. A moveable pulley or a mix of pulleys can deliver a mechanical advantage of more than one. Moveable pulleys are appended to the item being moved. Fixed and moveable pulleys can be consolidated into a solitary unit to create a greater mechanical advantage.

4 0

3 years ago

The howler monkey is the loudest land animal and can be heard up to a distance of 2.5 km. Assume the acoustic output of a howler

bearhunter [10]

Answer:

10⁻¹² W / m²

Explanation:

The feeble sound that a man can hear is of the vale which measures 0 on decibel scale . The intensity of sound in terms of J / m² .s is 10⁻¹² W / m² .

So the intensity of sound of monkey at 2.5 km must be 10⁻¹² W / m² .

4 0

4 years ago

A seesaw is 4.0m long with a pivot at its midpoint. A boy who weighs 400N sits at a distance of 1.5m from the pivot. His sister

bezimeni [28]

Answer:

the girl must sit 2 cm from the pivot at the opposite end of the seesaw.

Explanation:

Given;

length of the seesaw, L = 4.0 m

weight of the boy, W₁ = 400 N

position of the boy from the pivot, d₁ = 1.5 m

weight of her sister, W₂ = 300 N

First, make a sketch of this information given;

0---0.5m---------------------Δ--------------------------4m

↓<--------1.5m-------> <---------x--------->↓

400 N 300N

Apply the principle of moment about the pivot, to determine the value of x;

Sum of anticlockwise moment = sum of clockwise moment

400(1.5) = 300(x)

600 = 300x

x = 600/300

x = 2 cm

Thus, the girl must sit 2 cm from the pivot at the opposite end of the seesaw.

8 0

3 years ago

Uranium-238 (U238) has three more neutrons than uranium-235 (U235). Compared to the speed of sound in a bar of U235, is the spee

natta225 [31]

Answer:

The correct answers to then question are

A and B

Explanation:

As highlighted, the atoms of the two isotopes are chemically identical and they have similar characteristics due to the presence of equal number of protons and electrons (92 each). Therefore factors influenced by the chemistry of the atoms of the isotopes such as the distance between atoms and the stiffness of the inter-atomic spring is identical for both $U_{235}$ and $U_{238}$

An analogy of the spring constant and the inter-atomic distance is to consider the atoms of the metal to be interconnected by elastic material and as such the stiffness of the elastic material and the inter-atomic distance are determined by surface factors occurring on the surface

7 0

3 years ago