2 years ago

What is a free electron? Can someone help?

1 answer:

3 0

A free electron is one which has become detached from a covalent bond between two atoms and is able to move around from atom to atom and possibly take part in electric current flow.

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An object travels a distance d with acceleration a over a period of time t according to the equation: d = at² After 2.3 seconds

matrenka [14]

Answer:

A 26m

Explanation:

firstly the answer will not be part c as distance unit will be meters (m)

next, substitute the values of a and t as shown

$\frac{1}{2} (9.8)(2.3)^2 = 25.921$

the answer rounded off to 2 significant figures will be hence 26m

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2 years ago

If a train conductor is describing the speed of the train as well as the direction the train is going, then the train conductor

natita [175]

Then, train conductor is said to be describing the train's VELOCITY........

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A Submerged Ball Part A A ball of mass mb and volume V is lowered on a string into a fluid of density Pi (Figure 1) Assume that

frozen [14]

Answer:

T = mg - $\rho_f$ ×V×g

Explanation:

Here we have the mass of the ball is given as $m_b$

The density of the fluid = $\rho_f$

The volume of the ball = V

Acceleration due to gravity = g

According to Archimedes's principle, the upthrust = Weight of fluid displaced

Tension in string = T = weight of ball - upthrust

T = mg - $\rho_f$ ×V×g

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3 years ago

____________ is the number of complete movements of a wave per second.

Citrus2011 [14]

hertz: A unit for measuring frequency, equal to one cycle per second. If a sound wave has a frequency of 20,000 Hz,

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2 years ago

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Which of the 3 states of matter is easier to increase the temperature by one degree; in a liquid, in a solid, or in a gas?

Mashcka [7]

Answer:

gas

Explanation:

this is bcz they have higher kinetic energy compared to liquids and gases

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3 years ago