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ipn [44]
3 years ago
13

Both a fire blanket and the spray from a fire extinguisher put out a fire by pressing down on the fire and pushing any oxygen aw

ay. When there is no oxygen, the fire stops. Sometimes it is safe to pour water on a fire to put it out, but if a fire is ever caused by electrical energy, water will spread the fire.
With this in mind, what most likely explains why it is important to make sure hands are dry before working with any scientific electrical equipment?

Fires are started by water.
Germs should not be electrified.
Water can carry electricity.
Wet fire blankets will not work.
Physics
2 answers:
zysi [14]3 years ago
8 0

Answer: C.) Water can carry electricity.

Explanation:

Sladkaya [172]3 years ago
7 0

Answer:

Water can carry electricity

Explanation:

While pure water does not conduct electricity, ionized water does. It is common that water is ionized than is pure, unless it is purified. The dissolved ions in the water are what makes the water conduct electricity. Handling electric equipment with wet hands may lead to electrocution.

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What will be the length of a half wavelength dipole antenna operating at 10GHz?
iVinArrow [24]

Given :

Frequency , \nu = 10\ GHz .

To Find :

The length of a half wavelength dipole .

Solution :

Now , wavelength is given by :

\lambda=\dfrac{c}{\nu}\\\\\lambda=\dfrac{3\times 10^8\ m/s}{10\ GHz}\\\\\lambda=\dfrac{3\times 10^8}{10\times 10^9}\ m\\\\\lambda=0.03\ m\\\\\lambda=3 \ cm

Now , half length is given by :

L=\dfrac{\lambda}{2}\\\\L=\dfrac{3}{2}\ cm\\\\L=1.5 \ cm

Therefore , length of a half wavelength dipole is 1.5 cm .

Hence , this is the required solution .

4 0
2 years ago
When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the s
skad [1K]

Answer:

The value a = 1.1842 \ m/s^2

Explanation:

From the question we are told that

The weight of the sky diver is W =  968 \  N

The magnitude of the drag force is D_f  =  1085 \  N

The mass of the sky diver is m  =  98.8 \ kg

Generally the net force acting on the sky diver is mathematically represented as

F = m * a  =  D_f  - W

Hence the acceleration of the sky diver is mathematically represented as

a =  \frac{D_f - W}{ m}

=> a =  \frac{1085 - 968}{  98.8}

=> a = 1.1842 \ m/s^2

7 0
3 years ago
Two spheres A and B are projected off the edge of a 1.0 m high table with the same horizontal velocity . sphere A has a mass of
Svetlanka [38]

A would land before since its heavier

3 0
3 years ago
What are differences between an entrepreneur and an employee<br>​
Wewaii [24]
Employees execute tasks while entrepreneurs plan. An employee can take work day by day, whereas an entrepreneur has to consider how well the tasks are being performed relative to the long-term plan for the business.
4 0
2 years ago
Read 2 more answers
. A chemistry student’s height is measured at 68.5 inches. How tall is the student in cm?
tatiyna

1 inch = 2.54 centimeters

All we need to do is multiply.

68.5 * 2.54 = 173.99cm

Best of Luck!

3 0
3 years ago
Read 2 more answers
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