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Gnom [1K]
4 years ago
9

Why mercury is preferred over alcohol in thermometer

Physics
1 answer:
kondor19780726 [428]4 years ago
7 0

Answer:

Explanation:

Reason why Mercury is preferred to alcohol as thermometric liquids. 1. Mercury has a much greater conductivity than alcohol and expands rapidly, and thus indicates a temperature change quickly. ... Mercury does not wet glass but alcohol because of its concave meniscus tends to cling to the walls of stem of the thermometer.

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One can estimate the oil reservoir pressure underground from the height the oil rises. Of the gusher rises to 200 ft above groun
aniked [119]

Answer:

12,608 kPa

Explanation:

First we need to convert the density to standard units, that is kg/m^3

0.85 g/cm^3 = 0.85 × \frac{100^{3} }{1000} = 0.85 × 1000 = 850 kg/m^3

Pressure of oil = pressure at surface + rho × g × h

= 101,000 + (850×9.81×1500)

= 12,608 kPa

The units in the part 'rho.g.h' will cancel out against each other and you will be left with the unit Pascals - which is the unit for pressure.

Hope that answers the question, have a great day!

4 0
3 years ago
Karl measures the current through a resistor. What else will he need to measure in order to work out its resistance?
Shkiper50 [21]

Answer:

The voltage (V)

Explanation:

Ohms, in his law, has explained the relationship between current, resistance and voltage.

Ohm's law, which states that the voltage passing through a resistor is directly proportional to both the current and the resistance of the resistor, has the following equation:

V = IR

Where;

V = voltage (volts)

I = current (Amperes)

R = resistance (ohms)

According to this question, Karl measures the current, I, through a resistor. In order to calculate his resistance, R, he will need to measure the voltage, V.

7 0
3 years ago
Can you make sound you can see?​
navik [9.2K]
No, sound waves are invisible to our eyes
5 0
3 years ago
Need help with is if u can asap
jeka94
I am guessing by what I had it is a plz don't quote me on that I could be wrong
8 0
3 years ago
If a person uses about 4 calories to fuel a minute of walking, and it takes about 20 minutes to walk a mile, approximately how m
Lemur [1.5K]

Answer:

43.75 miles must a person walk to utilize the energy in (“burn”) a pound of fat.

Explanation:

3,500 calories are present in 1 pound of the fat.

Thus, given that:

<u>4 calories are burnt in 1 minute of walking.</u>

So,

1 calories are burnt in 1/4 minute of walking.

Or,

<u>1 calories are burnt in 0.25 minute of walking.</u>

Thus,

<u>3500 calories are burnt in 0.25*3500 minutes of walking</u>

Minutes of walking needed to burn 3500 calories = 875 minutes.

Also, given that:

<u>20 minutes of walking covers 1 mile.</u>

<u>1 minute of walking covers 1/20 mile.</u>

So,

<u>875 minutes of walking covers (1/20)*875 mile.</u>

<u>43.75 miles must a person walk to utilize the energy in (“burn”) a pound of fat.</u>

6 0
3 years ago
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