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3 years ago

Which choice best explains the definition of a variable?

Physics

1 answer:

Alexandra [31]3 years ago

5 0

Answer:

I don't have the answer but...

Explanation:

A variable is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent a variable. The letters x, y, and z are common generic symbols used for variables.

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If we are viewing the atom in such a way that the electron's orbit is in the plane of the paper with the electron moving clockwi

Anastaziya [24]

Answer:

The magnitude of the electric field is $5.1 \times 10^{11} \frac{N}{C}$

Explanation:

Given:

Charge of electron $q = 1.6 \times 10^{-19}$ C

Separation between two charges $r = 5.3 \times 10^{-11}$ m

For finding the magnitude of the electric field,

$E= \frac{kq}{r^{2} }$

Where $k = 9 \times 10^{9}$

$E = \frac{9 \times 10^{9} \times 1.6 \times 10^{-19} }{(5.3 \times 10^{-11} )^{2} }$

$E = 5.1 \times 10^{11}$ $\frac{N}{C}$

Therefore, the magnitude of the electric field is $5.1 \times 10^{11} \frac{N}{C}$

5 0

4 years ago

The boiling point for liquid nitrogen at atmospheric pressure is 77k. Is the temperature of an open container of liquid nitrogen

algol13

Answer:
It would be lower than because, if the boiling point of that element is 77 Kelvin degrees then if it isn’t at boiling point it would automatically be cooler than that. Even if it’s at its original state. The normal temperature of Liquid Nitrogen is really cold -320.8 degrees.

YOU’RE WELCOME

8 0

3 years ago

Why aren't humans as evolved as we think we are?

bezimeni [28]

Well there is many ways we are not evolved as much as we think we are from being we die from a lot of diseases to world hunger and other things to be honest humans are far from being really evolved in life we really need to focus on cures and solving world hunger and fighting among ourselves

Hope this helps

8 0

3 years ago

A marble on a frictionless track, starting from point A in the drawing, is projected down the curved runway. (This means that th

EleoNora [17]

Answer:

v = 4.4 m / s

Explanation:

Unfortunately, the exercise scheme does not appear. Let's analyze the problem the marble leaves point A with an initial velocity, goes down and then rises to a given height where its velocity is zero, in the whole trajectory they tell us that the resistance is zero, so we can use the conservation relations of the enegy.

Starting point. Point A

Em₀ = K + U = ½ m v2 + mg y_a

point B.

Em_f = U = m g y

the energy is conserved

Em₀ = Em_f

½ m v² + mg y_a = m g y

½ m v² = m g (y -y_a)

v = $\sqrt {2g ( y - y_a)}$

In the exercise the diagram is not seen, but the height of point A must be known, suppose that y_a = 4 m

v = $\sqrt{ 2 \ 9.8 ( 5 -4)}$

v = 4.4 m / s

4 0

3 years ago

What happens when a vector is multiplied by a scalar?

iogann1982 [59]

The scalar operates only on the magnitude of the vector.
So the length of the vector may change ... becoming longer
or shorter ... but its direction doesn't change.

3 0

4 years ago