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2 years ago

Which system is trans portion for nutrients throughout the system?

Physics

2 answers:

Svetach [21]2 years ago

8 0

Answer:

B. Circulatory system

Explanation:

Circulatory system is the system of our body which includes heart, blood and blood vessels. This system is a complete network which helps in supplying oxygen and other nutrients to the body tissues. It helps in transporting hormones and also removes the unnecessary or waste products.

The heart which is a primary organ of the circulatory system acts like a pump and pumps blood throughout the body with the use of blood vessels. The blood vessels which transport the blood towards the heart is called the vein while the blood vessels which transport the blood away from the heart is called the artery. The arteries carries oxygen and nutrients to the tissues and cells which is then re-oxygenated in lungs and transported back to the heart through vein.

Therefore, the system responsible for transporting nutrients through out the body is the circulatory system.

vlada-n [284]2 years ago

8 0

Answer:

Explanation:

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Methods to reduce the frictional force between the an object and surface which it is in contact.

telo118 [61]

Use of lubricant
Use of ball bearers
Use of streamlined body
Use of graphite

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2 years ago

Heavy crate sits at rest on the floor of a warehouse. you push on the crate with a force of 400 n, and it doesn't budge. what is

maks197457 [2]

Heavy crate sits at rest on the floor of a warehouse. you push on the crate with a force of 400 N, and it doesn't budge. The magnitude of the friction force on the crate in Newton is 400N

This is due to Friction force, which is defined as the resisting force that acts on a body when it is at rest (Static friction) or when it is in motion (Kinetic friction).

When a force is applied on a stationary body, the force of static friction starts to act on the body which prevents any relative motion between the object and surface. The magnitude of friction increases up to μsN, where μs is the coefficient of static friction. As the crate didn't budge, it means the amount of force applied was less than μsN. Hence the force applied was canceled by an equal and opposite amount of frictional force which was equal to 400N.

Learn more about frictional force here

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8 0

1 year ago

A slender rod is 90.0 cm long and has mass 0.120 kg. A small 0.0200 kg sphere is welded to one end of the rod, and a small 0.080

deff fn [24]

Answer:

Speed of 0.08 kg mass when it will reach to the bottom position is 1.94 m/s

Explanation:

When rod is released from rest then due to unbalanced torque about the hinge the system will rotate

Now moment of inertia of the system is given as

$I = \frac{ML^2}{12} + \frac{m_1L^2}{4} + \frac{m_2L^2}{4}$

now we have

$M = 0.120 kg$

$m_1 = 0.02 kg$

$m_3 = 0.08 kg$

now we have

$I = \frac{0.120(0.90)^2}{12} + \frac{0.02(0.90)^2}{4} + \frac{0.08(0.90)^2}{4}$

so we have

$I = 8.1 \times 10^[-3} + 4.05 \times 10^[-3} + 0.0162$

$I = 0.02835$

now by energy conservation we can say work done by gravity must be equal to change in kinetic energy

so we have

$\frac{1}{2}I\omega^2 = m_1g \frac{L}{2} - m_2 g\frac{L}{2}$

$\frac{1}{2}(0.02835)\omega^2 = (0.08 - 0.02)(9.81)(0.45)$

$\omega = 4.32 rad/s$

Now speed of 0.08 kg mass when it reaches to bottom point is given as

$v = \omega \frac{L}{2}$

$v = 4.32 (0.45)$

$v = 1.94 m/s$

3 0

3 years ago

3. A typical 12-V car battery can deliver about 750,000 C of charge before dying. This is not a lot of charge. As a comparison,

love history [14]

Answer:

Explanation:

Energy = volt x charge

= 12 x 750000 J

= 9000,000 J

Latent heat of vaporisation

= 2260000 J / kg

kg of water vaporised

= 9000,000 / 2260000

= 3.982 kg .

3 0

2 years ago

43- The lighter you are, the stronger the air resistance because:

expeople1 [14]

Answer:

b) The gravitational pull will be weak.

Explanation:

Less mass requires less force. Gravity or gravitational pull is a force. In order for you to stay in place and not go through the ground, however, you require something to pulling you away from the Earth. That's why we have air resistance.

5 0

2 years ago