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3 years ago

What resource could run out thousands of years from now energy resourses

Physics

1 answer:

Sever21 [200]3 years ago

8 0

Oil is the most common out of non renewable resources .-.

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What does the slope of the curve on a distance vs time graph represent?

Lilit [14]

Slope of a curve Y plotted against X is mathematically given as

$slope = \frac{dy}{dx}$

now here we can see that if similarly graph is plotted against distance and time then slope is given as

$slope = \frac{dx}{dt}$

here we can say that above is ratio of small distance and very small interval of time.

so here we can say that this ratio of distance and time for very small interval of time is known as instantaneous speed of the object which is falling freely under gravity.

So here slope of the graph will represent the speed at a given instant.

6 0

3 years ago

What is the displacement of the object?

sveta [45]

Answer:

Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.

6 0

3 years ago

A 1,250 W electric motor is connected to a 220 Vrms, 60 Hz source. The power factor is lagging by 0.65. To correct the pf to 0.9

Black_prince [1.1K]

Answer:

$C = 46.891 \mu F$

Explanation:

Given data:

v = 220 rms

power factor = 0.65

P = 1250 W

New power factor is 0.9 lag

we knwo that

$s = \frac{P}{P.F} < COS^{-1} 0.65$

$S = \frac{1250}{0.65} < 49.45$

s = 1923.09 < 49.65^o

s = [1250 + 1461 j] vA

$P.F new = cos [tan^{-1} \frac{Q_{new}}{P}]$

solving for $Q_{new}$

$Q_{new} = P tan [cos^{-1} P.F new]$

$Q_{new} = 1250 [tan[cos^{-1}0.9]]$

$Q_{new} = 605.40 VARS$

$Q_C = Q - Q_{new}$

$Q_C = 1461 - 605.4 = 855.6 vars$

$Q_C = \frac[v_{rms}^2}{xc} =v_{rms}^2 \omega C$

$C = \frac{Q_C}{ v_{rms}^2 \omega}$

$C = \frac{855.6}{220^2 \times 2\pi \times 60}$

$C = 4..689 \times 10^{-5}$ Faraday

$C = 46.891 \mu F$

6 0

4 years ago

An electric toaster has a power rating of 1100 W at 110 V. What is the resistance of the heating coil?

Semmy [17]

R = 11 ohms

Explanation:

Given parameters:

Power of the electric toaster = 1100W

Voltage = 110V

Unknown:

Resistance, R of the heating coli = ?

Solution:

Electric power is given as:

Electric power = IV

where:

I is the current

V is the voltage

According to Ohm's law, V = IR

where R is the resistance. If we make current the subject of the formula and substitute, it gives:

Power = $\frac{[tex]V^{2}$ }{R}[/tex]

Power = $\frac{[tex]110^{2}$ }{R}[/tex]

R = $\frac{Power }{[tex]110^{2}$ }[/tex] = $\frac{1100 }{[tex]110^{2}$ }[/tex]

R = 11 ohms

learn more:

Power supply brainly.com/question/4322575

#learnwithBrainly

3 0

3 years ago

5. Which of the following is velocity? *

ivann1987 [24]

A. 20m/s because the unit for velocity is m/s

3 0

3 years ago