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4 years ago

Please help me on this

Physics

1 answer:

Fynjy0 [20]4 years ago

3 0

combustion of fossil fuels would be the correct answer when dealing with the alteration of the carbon cycle.

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The pressure exerted by a column of liquid is equal to the product of the height of the column times the gravitational constant

almond37 [142]

Answer:

The column of methanol is = 12.27 m high

Explanation:

The pressure of mercury (p) = ghd,................... equation 1

Where g = acceleration due to gravity, h= height, d = density.

d = 13.6 g/ml convert to kg/m³ = 13.6 g/ml(1000 (kg/m³)/(g/ml))

d =13600 kg/m³., h= 713mm = 713/1000 = 0.713 m., g= 9.80 m/s²

Substituting these values into equation 1,

P = 13600 × 0.713 × 9.8 = 95028.64 N/m².

If the pressure of the mercury supports the pressure exerted by the methanol

∴ pressure that supports the mercury = pressure of the methanol

p = ghd

making h the subject of formula,

h = p/gd ........................... equation 2

Where p = 95028.64 N/m², g = 9.8 m/s², d = 0.79 g/ml = (0.79 × 1000) kg/m³

d = 790 kg/m³.

Substituting these values into equation 2

h = 95028.64/(9.8×790)

h = 95028.64/7742

h = 12.27 m.

The column of methanol is = 12.27 m high

7 0

3 years ago

An electric lightbulb in a lamp fixture is illuminating a small room. The system consists of the lightbulb, the lamp fixture, th

mixas84 [53]

The role of thermal energy is to balance the electrical energy lost from the light bulb.

<h3>Energy conservation</h3>

The law of energy conservation states that energy can neither be created nor destroyed but can be transformed from one form to another.

<h3>Thermal energy</h3>

This is a form of energy that occurs due to rise in temperature.

The role of thermal energy is to balance the electrical energy lost from the light bulb.

Learn more about conservation of energy here: brainly.com/question/166559

6 0

2 years ago

A flywheel with a very low friction bearing takes 1.6 h to stopafter the motor power

Nina [5.8K]

Answer:

(I). The initial rotation rate is 4.29 rad/s.

(II). The revolutions is 3932.

Explanation:

Given that,

Time = 1.6 h

Angular velocity = 41 rpm

(I). We need to calculate the initial rotation rate in rad/s

$\omega=41\ rev/m$

$\omega=\dfrac{41\times 2\pi}{60}\ rad/s$

$\omega=4.29\ rad/s$

(II). We need to calculate the revolutions

Using formula of revolutions

$\theta=\omega t$

$\theta=4.29\times1.6\times3600$

$\theta=24710\ rad$

$\theta=\dfrac{24710}{2\pi}$

$\theta=3932\ revolution$

Hence, (I). The initial rotation rate is 4.293 rad/s.

(II). The revolutions is 3932.

7 0

4 years ago

Can someone help me with one question? <br><br> “Do cells in the body help you grow?”

noname [10]

Body tissues grow by increasing the number of cells that make them up. Cells in many tissues in the body divide and grow very quickly between conception and adulthood.

5 0

3 years ago

Read 2 more answers

Estefan has determined his BMI at 31. Explain how he can apply the FITT training principles to improve his body composition.

-BARSIC- [3]

Frequency:

Cardio : Five or more
HIIT: 5 or 4

Strength: 2-3 days on non-consecutive days a week

Intensity:
How hard you work during the session

For cardio : workout at your target heart rate.
For HIIT: varying intensity from high to low or rest ( no slow pace)
For strength: you should lift enough weight to complete the needed number of reps and sets.

Time:

For cardio 30- 60 min
For HIIT 45 min (short periods of bursts followed by rest)

For strength depends on the amount of weight.

Type:

Either cardio, HIIT or strength training (resistance training)

NOTE: This info is given by an unqualified brofessor, who uses his hard gained bro-science in the expense of scientific facts to solve others broblems.

7 0

4 years ago