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3 years ago

Which way does current always flow?

Physics

1 answer:

Phoenix [80]3 years ago

3 0

Answer:

Electrons move through the wires in the opposite direction.

Explanation:

The direction of an electric current is by convention the direction in which a positive charge would move. Thus, the current in the external circuit is directed away from the positive terminal and toward the negative terminal of the battery.

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Thermal effects refers to the:

lesya [120]

Answer:

removal of heat by cooling towers

3 0

3 years ago

Read 2 more answers

What is the gravitational attraction on you due to a mountain with a mass of 100 million metric tons 1 km away ?

nikklg [1K]

The magnitude of the gravitational attraction is $4\cdot 10^{-4} N$ .

Explanation:

The magnitude of the gravitational force between two objects is given by

$F=G\frac{m_1 m_2}{r^2}$

where

$G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2}$ is the gravitational constant

m1, m2 are the masses of the two objects

r is the separation between them

In this problem, we have

$m_1 = 60 kg$ is my mass

The mass of the mountain is 100 million tons, and keeping in mind that

1 ton = 1000 kg

The mass of the mountain is

$m_2 = 100 \cdot 10^6 tons =100 \cdot 10^6 tons \cdot (1000 kg/ton)=100\cdot 10^9 kg$

The distance between me and the mountain is

r = 1 km = 1000 m

Therefore, the gravitational attraction is

$F=\frac{(6.67\cdot 10^{-11})(100\cdot 10^9)(60)}{(1000)^2}=4\cdot 10^{-4} N$

Learn more about gravitational force here:

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6 0

3 years ago

Which situations are necessary components for malpractice to occur?

Yuri [45]

a. The risk of injury must be predictable.

b. A "breach of duty" is when a professional fails to uphold a level of care.

c. There must be a standard of care in place, and the practitioner must assume responsibility for the patient.

d. There must be a clear link between the treatment received and the harm.

<h3>What is malpractice?</h3>

Malpractice, commonly referred to as professional negligence, is defined as "an incident of carelessness or incompetence on the part of a professional" under tort law.

The following professionals might be the target of malpractice claims:

Medical professionals: If a doctor or other healthcare practitioner does not exercise the level of care and competence that a similarly situated professional in the same medical field would deliver under the circumstances, a medical malpractice claim may be made against them.

Lawyers: Failure to provide services with the amount of competence, care, and diligence that a reasonable lawyer would use in the same situation may be grounds for a legal malpractice claim.

To know more about malpractice, visit;

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3 0

1 year ago

The current in a long solenoid of radius 5 cm and 17 turns/cm is varied with time at a rate of 5 A/s. A circular loop of wire of

aev [14]

Answer:

The current is $I =0.2mA$

Explanation:

From the question we are told that

The first radius is $R_1 = 5cm = \frac{5}{100} = 0.05cm$

The number of turns is $N = 17 \ turn/cm$

The current rate is $\frac{dI}{dt} = 5 A/s$

The second radius is $R_2 = 7cm = \frac{7}{100} = 0.07m$

The resistance is $r = 5 \Omega$

Generally the magnetic flux induced in the solenoid is mathematically represented as

$\O = B A$

Where is the magnetic field mathematically represented as

$B = N \mu_o I$

Where $\mu_o$ is the permeability of free space with a value of $\mu_o = 4\pi *10^{-7} N/A^2$

and A is the area mathematically represented as

$A = \pi (R_2 - R_1)^2$

$\O = N \mu I * \pi R^2$

Substituting values

$\O = 17 * 4\pi *10^{-7} * \pi (7-5)^2I$

$\O = 2.68*10^{-4}I$

The induced emf is mathematically represented as

$\epsilon =- |\frac{d\O}{dt}|$

$\epsilon = 2.68*10^{-4 } \frac{dI}{dt}$

substituting values

$\epsilon =2.68 *10^{-4} * 5$

$=1.3 *10^{-3} V$

From Ohm law

$I = \frac{\epsilon }{r}$

Substituting values

$I = \frac{1.3*0^{-3}}{5}$

$I =0.2mA$

8 0

3 years ago

A satellite moves in a circular orbit around the Earth at a speed of 5 km/s. Determine the satellite’s altitude above the surfac

givi [52]

Answer:

$h=9590835m$

Explanation:

Writing Newton's 2nd Law and Newton's Gravitational Law on the satellite (of mass m, experimenting an acceleration a) orbiting Earth (of mass M) with r as the distance between their centers we have:

$F=ma=\frac{GMm}{r^2}$