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3 years ago

The world’s supply of fossil fuels will _____.

Physics

2 answers:

scZoUnD [109]3 years ago

6 0

Answer: Dwindle slowly until a replacement source is found that provides the same power.

Explanation:

Fossil fuels are the fuels that are the non-renewable source of energy. These develop after long underground geological process. The raw material for the synthesis of the fossil fuels is the dead and decaying plant and animal matter. The degradation process is biological that is facilitated by the soil microbes but the heat and pressure generated in the underground region is responsible for the synthesis of the fossil fuels.

The world's supply of fossil fuels will dwindle slowly which means that it will diminish soon until another conventional or alternative source can meet the supply that is required to generate the same power.

Mekhanik [1.2K]3 years ago

3 0

The world’s supply of fossil fuels will dwindle slowly until a replacement source is found that provides the same power.

bc some day we will actually run out of it and find sth that gives power

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Explain how the situation shown above would be different if the skier experiences friction while traveling downhill. Include the

aleksandrvk [35]

Answer:

The force of friction acts in the direction opposite to the direction of motion. If friction would have been applied to the skier it would have resulted in a lower velocity and less kinetic energy.

Explanation:

5 0

2 years ago

Filiberto va a 90m/s en su carri, de repente se distrae por un par de segundos y su velocdad pasa a 40 m/s ¿cual fue su acelerac

svet-max [94.6K]

Answer:

Filiberto experimenta una deceleración de $2\,\frac{m}{s^{2}}$ .

Explanation:

(The problem was written in Spanish. Hence, explanation will be held in Spanish).

Asúmase que Filiberto se distrae por 2 segundos, puesto que un par equivale a dos, y que el vehículo experimenta un aceleración constante. La deceleración experimentada por el vehículo se deriva de la siguiente fórmula:

$a = \frac{v-v_{o}}{\Delta t}$

$a = \frac{40\,\frac{m}{s}-90\,\frac{m}{s} }{2\,s}$

$a = -25\,\frac{m}{s^{2}}$

Filiberto experimenta una deceleración de $2\,\frac{m}{s^{2}}$ .

7 0

3 years ago

A sound wave of frequency

Artyom0805 [142]

Answer:

0.283m

Explanation:

Speed (v) = wavelength × Frequency (f)

Wavelength = speed/ frequency

Wavelength = 343/ 1210 = 0.283m

8 0

3 years ago

A proton moving at 5.00 106 m/s through a magnetic field of magnitude 1.78 t experiences a magnetic force of magnitude 7.40 10-1

aliya0001 [1]

The magnetic part using the Lorentz force is: F = q v x B,
where v and B are vectors and v x B is the vector cross product.

Magnitude of the force: F = q v B sin(α)

So, sin(α) = F/( e v B), with e the proton charge.

This will give you a value for sin(α), and two potentials for its opposite.

You will now look for:

sin(α) = 7.40 10^-13/( 1.60 10^-19 * 5 10^6 * 1.78)
= 0.520

So either sin(α) = 0.502 or sin(α) = -0.502
The 1st α = 30.1 degrees or α = 150 degrees.
The 2nd α = 210 degrees or α = 330 degrees.
So we can say that 30.1 degrees and 330 degrees would be minimum and biggest on [0,360]

6 0

2 years ago

the minimum flying speee for a bird called a house martin is 9.0ms^-1. it reaches this speed by falling from its nest before swo

Lilit [14]

Answer:

The nest must be about 4.15 meters above ground

Explanation:

Use the velocity equation under accelerated motion (acceleration of gravity ):

$v_f=v_i+a\,*\,t$

which for this case has initial velocity = 0 (falls from the nest), final velocity = 9 m/s, and a = 9.8 m/s^2, then we can find the time needed in air while falling to reach the required speed:

$v_f=v_i+a\,*\,t\\9=0+9.8\,t\\t=\frac{9}{9.8} \, sec\\t \approx 0.92\,\, sec$

We now use this time value to find the distance covered in free fall during 0.92 seconds:

$d=\frac{1}{2} \,9.8 \,t^2=4.9\,(0.92)^2=4.147 \,meters\approx 4.15\,meters$

8 0

2 years ago