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3 years ago

The change in velocity during a measurable time interval, divided by the time interval, is the _____.

1 answer:

5 0

Hello!

Let's put it into symbols:

Change in velocity = $\mathsf{V_f - V_i=\Delta V}$
A measurable interval: $\mathsf{\Delta t}$

This division is:

$\mathsf{\dfrac{\Delta V}{\Delta t}}$

We can recognize this as the Average Acceleration $\mathsf{a_m}$

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It takes 20s for 3x10^6 electrons to flow through a wire ,what is the current?

Elina [12.6K]

Answer:

Explanation:

The variables we know and are given are:

time, t = 20s

Charge, Q = 3x1-^-6 electrons, which is just 3x10^-6C (C stands for Coulombs, which is the unit for Charge)

We need to find the current, I, and since we know Q and t we can substitute these values into the given equation:

I=Q/t (which if you look at what the RHS is saying, its Charge over time, or more literally means the amount of charge passing a point over a period of time)

If we substitute these values, we will get I as:

I = Q / t

I = 3x10^-6 / 20

I = 1.5x10^-7 A

Hope this helps!

6 0

3 years ago

A "biconvex" lens is one in which both surfaces of the lens bulge outwards. Suppose you had a biconvex lens with radii of curvat

madam [21]

Answer:

12 cm

Explanation:

We shall use Lens makers formula here which is as follows

$\frac{1}{F} =(\mu-1) (\frac{1}{R_1} -\frac{1}{R_2})$

Put μ = 1.5 , R₁ = 10 cm ,R₂ = - 15 cm ( according to sign convention )

$\frac{1}{F} =(1.5-1) (\frac{1}{10} -\frac{1}{-15})$

= .5 x ( 15 + 10 ) / 15 x 10

= $\frac{25}{2\times10\times15}$

F = 12 cm

7 0

3 years ago

When a fisher casts his line into the water, the location where he sees the fish is not actually where the fish is, due to refra

Dennis_Churaev [7]

The fish is actually farther from you then you think

8 0

3 years ago

Each value in nature has a number part, called its____<br> and a dimension, or unit

saul85 [17]

Answer:

<u>Magnitude</u>

Explanation:

Each value in nature has a number part, called its magnitude and a dimension called its unit.

For example,

The length of an object is 10 cm. It means that 10 shows the magnitude of length and cm shows its unit.

7 0

3 years ago

The earth has a vertical electric field at the surface, pointing down, that averages 107 N/C. This field is maintained by variou

Drupady [299]

Answer:

Planet is all but a complete sphere and its conductor so we can presume that the net charges present on the inside of the planet is considered to be equaled to zero, so we got our self having more charges present on the surface of the planet.

So, for such reasons we say that there is a net vertical charges on the planet's surface which is maintained by various atmospheric processes, including lightning.So, after concluding all of the equations and mathematical analyses we can say that the net charge on the planets surface will be be much higher then we can expect. Just because a lot of energy transmission happens on the surface of this planet.

8 0

3 years ago