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3 years ago

What is the best example of physical contamination?

1 answer:

6 0

I might be wrong but I’d say the first one

Answer:
•when a food service worker touches food

Explanation:
The worker is physically putting his hands on the food, therefore contaminating it which whatever’s on his hands

-YW!! <33

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What type of lava is produced at a divergent plate boundary?

Hatshy [7]

Rhyolitic
Andesitic
Basaltic
Phaneritic

5 0

3 years ago

A helicopter is moving horizontally to the right at a

In-s [12.5K]

Answer:

Explanation:

Given

Weight of helicopter $W=53800 N$

inclination of blades with vertical $\theta =21^{\circ}$

Suppose $F_l$ is the lifting Force

Now using F-B-D

$F_{net}=0$ as helicopter is moving with constant velocity

balancing forces in Vertical Force

$F_l\cos \theta -W=0$

$F_l\cos \theta =W$

$F_l=\frac{W}{\cos \theta }$

$F_l=\frac{53800}{\cos 21}$

$F_l=57,627.6\ N$

Now sin component of lift is air resistance

$F_l\sin \theta -R=0$

where R=air resistance

$R=F_l\sin \theta$

$R=57,627.6\times \sin (21)$

$R=20,651.88\ N$

8 0

3 years ago

2 A kovács a meleg vasat a hideg vízbe teszi. A vas

Anton [14]

Answer:

300 kJ

Explanation:

There are two energy flows in this process.

Heat lost by iron + heat gained by water = 0

q₁ + q₂ = 0

-300 kJ + q₂ = 0

q₂ = 300 kJ

The water gained 300 kJ.

4 0

4 years ago

the moon revolves around the earth in a nearly circular orbit kept by gravitational force exerted by the earth work done will be

rodikova [14]

Answer:

Zero because the applied force is perpendicular to the motion of the object.

No work is done on an object moving is a circular path about a central attractive force.

Any work done in such a case would result in a change in the orbit.

3 0

3 years ago

4. List 3 detailed examples of Newton's 3rd Law.

slamgirl [31]

Answer: If one billiard ball hits another, the second will move with the same force as the first.

A child wants to jump to climb a tree (reaction), he must push the ground to propel himself (action).

A man deflates a balloon; the force with which the air comes out causes the balloon to move from one side to the other.

Explanation:

7 0

3 years ago

Read 2 more answers