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Otrada [13]
3 years ago
13

The resource speaks of the atmosphere as if it were living, in the sense that as the earth's surface is heated by the light from

the sun, it is heated unequally and as a result of this unequal heating of the surface, air and water begin to move around in "an effort to accomplish something."
Physics
1 answer:
Shtirlitz [24]3 years ago
6 0

Explanation:

The uneven heating causes temperature differences, which in turn cause air currents (wind) to develop, which then move heat from where there is more heat (higher temperatures) to where there is less heat (lower temperatures). The atmosphere thus becomes a giant "heat engine", continuously driven by the sun.

Wind is the result of pressure changes in the atmosphere due to temperature.

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an object starts at rest and accelerates until it is moving at 247 km/h. if it takes 1.7minutes for this change to occur what is
d1i1m1o1n [39]

The average acceleration in 0.67 m/s^2.

The average acceleration is calculated as change in velocity/time

a=(247*5/18)/(1.7*60)

=68.61/102=0.67 m/s^2

Therefor the average acceleration of the object is 0.67 m/s^2

5 0
3 years ago
How many octants are in the three-dimensional coordinate system?
Akimi4 [234]
There are eight octants in the three-dimensional coordinate system. From the word octants you can easily say or associate it to the number 8. Hope this answers the question. Have a nice day. Feel free to ask more questions.
8 0
3 years ago
Answer quick!!! (Edge 2021)
mihalych1998 [28]

Answer:

I believe the answer is B.

7 0
3 years ago
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15. Two like charges: A. Attract each other B. Repel each other C. Must be neutrons D. Neutralize each other
seropon [69]

Answer:

B. Repel each other

Explanation:

Two like charges have the same sign. Example an electron with a negative charge (-e) and another electron with same charge(-e). Or a proton with a positive charge (+e) and another proton with same charge (+e). Since each of  these pair charges have the same sign, they will repel each other.

On the other hand, if the charges are opposite, ie  negative charge and positive charge, they will attract each other.

B. Repel each other

7 0
3 years ago
When the capacitor is connected to a battery with voltage 500.0 V, the electric field between the plates is 79 % of the dielectr
Oksanka [162]

Complete question:

Polystyrene has dielectric constant 2.6 and dielectric strength 2.0 × 10⁷ V/m . A piece of polystyrene is used as a dielectric in a parallel-plate capacitor, filling the volume between the plates.

a- When the electric field between the plates is 79 % of the dielectric strength, what is the energy density of the stored energy?

b- When the capacitor is connected to a battery with voltage 500.0 V , the electric field between the plates is 79 % of the dielectric strength. What is the area of each plate if the capacitor stores 0.25 mJ of energy under these conditions?

Answer:

(a) The energy density of the stored energy is 2872.1 J/m³

(b) Area of the plate is 27.51 cm²

Explanation:

Given;

dielectric constant, K = 2.6

dielectric strength = 2.0 × 10⁷ V/m

potential difference of the battery, V = 500 V

Part (a)

Electric field strength, E = 79 % of dielectric strength

E = 0.79 x  2.0 × 10⁷ V/m

E = 1.58  × 10⁷ V/m

The energy density of the stored energy

u = ¹/₂Kε₀E²

where;

u is the energy density

ε₀ is permittivity of free space = 8.85 x 10⁻¹² C²/N.m²

u = ¹/₂Kε₀E² = ¹/₂ x 2.6 x 8.85 x 10⁻¹² x (1.58  × 10⁷)²

u = 28.721 x 10² J/m³

u = 2872.1 J/m³

Part (b) Area of the plate if the capacitor stores 0.250 mJ of energy

A = \frac{C_oV}{\epsilon_o E}

The energy density of stored energy is also given as;

U = ¹/₂KC₀V², U = 0.250 mJ

The charge stored in the capacitor;

C_o =\frac{2U}{KV^2} \\\\C_o =\frac{2*0.25*10^{-3}}{2.6*(500)^2} = 7.692 *10^{-10} =  0.7692  \ nF

Substitute these values and solve for Area

A = \frac{C_oV}{\epsilon_o E} = \frac{7.692*10^{-10} *500}{8.85*10^{-12}*1.58*10^7} = 2.751*10^{-3} \ m^2

A = 27.51 cm²

3 0
4 years ago
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