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3 years ago

What is the study of economics?

Physics

2 answers:

ziro4ka [17]3 years ago

5 0

Answer:

Economics is the study of how societies use scarce resources to produce valuable commodities and distribute them among different people.

Explanation:

The ultimate goal of economic science is to improve the living conditions of people in their everyday lives.

Hope this helps!

deff fn [24]3 years ago

5 0

Answer:

the branch of knowledge concerned with the production, consumption, and transfer of wealth. (basically the study of money and not just banks but how it effects the world)

Explanation:

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A charge Q accumulates on the hollow metallic dome, of radius R, of a Van de Graaff generator. A probe measures the electric fie

andre [41]

The electric field changes by a factor 4/9

Explanation:

The electric field at a point outside a hollow charged sphere is identical to that produced by a single point charge Q, therefore its strength is given by

$E=k\frac{Q}{r^2}$

where

k is the Coulomb constant

Q is the charge on the sphere

r is the distance from the centre of the sphere

In this problem, we have a charge Q accumulated on the dome of the generator of radius R. The electric field strength at a distance of 2R from the sphere centre is

$E=\frac{kQ}{(2R)^2}=\frac{1}{2}\frac{kQ}{R^2}$

Then, the probe is moved to a new distance of

r = 3R

From the centre of the sphere: therefore, the new electric field will be

$E'=\frac{kQ}{(3R)^2}=\frac{1}{9}\frac{kQ}{R^2}$

So, the electric field has changed by a factor

$\frac{E'}{E}=\frac{1/9}{1/4}=\frac{4}{9}$

Learn more about electric field:

brainly.com/question/8960054

brainly.com/question/4273177

#LearnwithBrainly

7 0

3 years ago

A potential difference of 300 volts is applied to a 2.0-µf capacitor and an 8.0-µf capacitor connected in series. (a) What are t

zubka84 [21]

Answer:

a) Q1=Q2=480μC V1=240V V2=60V

b) Q1=96μC Q2=384μC V1=V2=48V

c) Q1=Q2=0C V1=V2=0V

Explanation:

Let C1 = 2μC and C2=8μC

For part (a) of this problem, we know that charge in a series circuit, is the same in C1 and C2. Having this in mind, we can calculate equivalent capacitance first:

$C=\frac{1}{\frac{1}{C1} +\frac{1}{C2} } = 1.6\mu C$

$Q_{T} = V_{T}*C_{T} = 480\mu C$

$V1 = \frac{Q1}{C1}=240V$

$V2 = \frac{Q2}{C2}=60V$

For part (b), the capacitors are in parallel now. In this condition, the voltage is the same for both capacitors:

$V1=V2$ So, $\frac{Q1}{C1} = \frac{Q2}{C2}$

Total charge is the same calculated for part (a), so:

$\frac{Qt - Q2}{C1} = \frac{Q2}{C2}$ Solving for Q2:

Q2 = 384μC Q1 = 96μC.

Therefore:

V1=V2=48V

For part (c), both capacitors would discharge, since their total voltage of 300V would by applied to a wire (R=0Ω). There would flow a huge amount of current for a short period of time, and capacitors would be completely discharged. Q1=Q2=0C V1=V2=0V

3 0

3 years ago

The particles of a substance can have kinetic energy (KE) and potential energy (PE). Which equation best summarizes the internal

Olenka [21]

Answer:

The internal energy of a substance is equal to the total amount of potential energy and kinetic energy of ALL the particles in the substance.

For example, when the temperature increases (more temperature means more energy), the kinetic energy of the particles in the substance increases.

And when we reach a point near a change of phase (like near fusion point) there is energy used to break the bonds between the particles, then we have an increase in potential energy.

Then we could write the internal energy as:

U = ∑(KEₙ) + ∑(PEₙ)

Where ∑(KEₙ) and ∑(PEₙ) are the sums of the kinetic energy and potential energy of all the particles in the substance.

8 0

3 years ago

Read 2 more answers

Which major biome group is most of the united states part of?

lorasvet [3.4K]

Mainly it belongs in the deciduous forest biome. The U.S also includes the desert, tundra, and coniferous forest biomes.

Put this under 'Geography' next time.

Hope this helps!

~GeeksandNerds

4 0

3 years ago

A 2.0 kg body rests on a frictionless wedge that has an inclination of θ = 35° and an acceleration to the right such that the ma

quester [9]

OK, the wedge is accelerating (a) at Theta = 180 degrees (to the right) and the wedge is inclined theta = 75 degrees. For the m = 2 kg block to remain at rest all we need is a net force f = W cos(theta) - F sin(theta) = 0; where F = ma and W = mg the weight of the block. That is, the weight component along the incline is offset by the acceleration component along the surface; so the block does not slide.

Solving we have W cos(theta) = mg cos(theta) = ma sin(theta) = F sin(theta); such that a = g cos(theta)/sin(theta) = g cot(theta). Assuming g ~ 9.81 m/sec^2, you can now plug and chug to find the answer.

<span>The physics is this...when the net force on a body is f = 0, that body will not accelerate and start to move if it is already still. So when the block's weight component along the surface of the wedge is offset by the equal but opposite force along the surface of the accelerating wedge, the still block will not move.

I hope my answer has come to your help. Thank you for posting your question here in Brainly.
</span>

8 0

4 years ago

What is the study of economics?​

What is the study of economics?