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tino4ka555 [31]

3 years ago

5

How varicose veins form?

2 answers:

marissa [1.9K]3 years ago

7 0

Answer:

Increase blood pressure

Readme [11.4K]3 years ago

4 0

Answer:

Varicose veins are caused by increased blood pressure in the veins. Varicose veins happen in the veins near the surface of the skin (superficial). The blood moves towards the heart by one-way valves in the veins. When the valves become weakened or damaged, blood can collect in the veins.

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joja [24]

Answer:

In my opinion I think that the answer is C sorry If I get this wrong.

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3 years ago

Which has more momentum, a small object moving 10 miles per hours or a large object at rest?

xeze [42]

Well the object will have no Momentum since it is not moving, so a small object that is going 10 mph will have Momentum.

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4 years ago

A technician wearing a brass bracelet enclosing area 0.00500 m2 places her hand in a solenoid whose magnetic field is 3.10 T dir

aliya0001 [1]

Explanation:

Given that,

Area enclosed by a brass bracelet, $A=0.005\ m^2$

Initial magnetic field, $B_i=3.1\ T$

The electrical resistance around the circumference of the bracelet is, R = 0.02 ohms

Final magnetic field, $B_f=0.93\ T$

Time, $t=16\ ms=16\times 10^{-3}\ s$

The expression for the induced emf is given by :

$\epsilon=-\dfrac{d\phi}{dt}$

$\phi$ = magnetic flux

$\epsilon=-\dfrac{d(BA)}{dt}$

$\epsilon=-A\dfrac{d(B)}{dt}$

$\epsilon=-A\dfrac{B_f-B_i}{t}$

$\epsilon=-0.005 \times \dfrac{0.93-3.1}{16\times 10^{-3}}$

$\epsilon=0.678\ volts$

So, the induced emf in the bracelet is 0.678 volts.

Using ohm's law to find the induced current as :

V = IR

$I=\dfrac{V}{R}$

$I=\dfrac{0.678}{0.02}$

I = 33.9 A

or

I = 34 A

So, the induced current in the bracelet is 34 A. Hence, this is the required solution.

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3 years ago

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g100num [7]

Speaking bout mass,
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4 years ago

Could anyone help with number 9?

Alisiya [41]

The answer would be A

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3 years ago