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4 years ago

Failures to arrive at an answer in a scientific investigation can still be useful because they show us what doesn't work. Answer

1 answer:

4 0

True
From what Ive learned its like how you create your own hypothesis for a science experiment it may not work completely that way but you learn what didnt work and what does work

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The magnitude E of an electric field depends on the radial distance r according to E = A/r4, where A is a constant with unit vol

Lesechka [4]

Answer:

$\Delta V = 0.053 A$

Explanation:

Electric field in a given region is given by equation

$E = \frac{A}{r^4}$

as we know the relation between electric field and potential difference is given as

$\Delta V = -\int E. dr$

so here we have

$\Delta V = - \int (\frac{A}{r^4}) .dr$

$\Delta V = \frac{A}{3r_1^3} - \frac{A}{3r_2^3}$

here we know that

$r_1 = 1.71 m$ and $r_2 = 2.89 m$

so we will have

$\Delta V = \frac{A}{3}(\frac{1}{1.71^3} - \frac{1}{2.89^3})$

so we will have

$\Delta V = 0.053 A$

8 0

3 years ago

Show that the expression pRT has the same units as the pressure, and thus that the ideal gas law is dimensionally consistent.

Gemiola [76]

Answer and Explanation:

We have given the expression $\rho RT$

Dimension of $\rho =ML^{-3}$

Dimension of R which is gas constant $=ML^2T^{-2}\Theta ^{-1}M^{-1}$

Dimension of temperature T $\Theta ^{-1}$

And dimension of pressure $ML^{-1}T^{-2}$

Now combine dimension of $\rho RT$ $=ML^{-3}ML^2T^{-2}\Theta ^{-1}M^{-1}\Theta ^{-1}=ML^{-1}T^{-2}$

So the dimension of $\rho RT$ and dimension P is same so there unit will also be same

From ideal gas equation we know that $PV=nRT$

$P=\frac{n}{V}RT=\rho RT$

As the both P and $\rho RT$ has same dimension so they are dimensionally constant

7 0

4 years ago

A scientist wants to study the effects of morning temperatures on flower width. Which is most likely a source of error in this s

ratelena [41]

The flower width data were collected at about the same time every day. 

According to the research, the responder made with the same query as this question it is: 

1. The flower width data were collected at about the same time every day. 
Why this choice because, the study is delving into the effects of morning temperatures on flower width hence, if the scientists collect flower at the same time –hour or minutes everyday during the period of the study the variable of time is not allotted from sunrise period to high noon since it defines time as morning, the variant of time is only inapt.

8 0

4 years ago

When you ride a bicycle in what direction is the angular velocity of the wheels?

melomori [17]

I think that the angular velocity vector points at right angles to the direction in which the wheels are turning (spindle on an old fashioned record player ?) and so at right angles to the direction the bike is moving in. This contributes to the gyroscope effect on the wheels and bike and allows a rapidly rotating wheel to be more stable than a slowly rotating one. Problem for the trainee cyclist is to believe that they are actually more stable when their wheels are moving quickly. 'cos the tendency is to go slowly to start with, which makes balancing harder.
But then, most cyclists, especially youngsters, don't sit down all day analysing circular motion vectors, which may be just as well.

4 0

4 years ago

If a spear is jabbeb exactly at that place where the fish appears in water, the fish is not killed

Korvikt [17]

You have learned your lesson well, Suhay. Your statement is correct.

The light rays from the fish BEND when they flow out of the water into the air. But our primitive brain still believes that the light rays flow STRAIGHT from the fish. The result is that the fish does not APPEAR to be at that place where it really is.

7 0

3 years ago