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MA_775_DIABLO [31]

3 years ago

7

If a fast-moving car making a loud noise approaches and moves past the person, what will happen as the distance between the two

increases?

1 answer:

lesantik [10]3 years ago

8 0

The pitch of the sound of the car will appear to be <span>lower than the pitch of the car next to you</span>

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To display the New Document dialog box, click the Office Button and then click New.

UNO [17]

True clicking the office button and then clicking new would display the new document.

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3 years ago

Two charged spheres are 20 cm apart and exert an attractive force of 8 x 10-9 n on each other. What will the force of attraction

Pavel [41]

Answer:

$3.2\cdot 10^{-8} N$

Explanation:

The inital electrostatic force between the two spheres is given by:

$F=k\frac{q_1 q_2}{r^2}$

where

$F=8\cdot 10^{-9} N$ is the initial force

k is the Coulomb's constant

q1 and q2 are the charges on the two spheres

r is the distance between the two spheres

The problem tells us that the two spheres are moved from a distance of r=20 cm to a distance of r'=10 cm. So we have

$r'=\frac{r}{2}$

Therefore, the new electrostatic force will be

$F'=k\frac{q_1 q_2}{(r')^2}=k\frac{q_1 q_2}{(r/2)^2}=4k\frac{q_1 q_2}{r^2}=4F$

So the force has increased by a factor 4. By using $F=8\cdot 10^{-9} N$ , we find

$F'=4(8\cdot 10^{-9} N)=3.2\cdot 10^{-8} N$

6 0

3 years ago

Sara walks part way around a swimming pool. she walks 50 yards north, then 20 yards east, then 50 yards south. the magnitude of

Semmy [17]

|---20----|
| |
| 50 |50
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Total displacement(D) 20 yards (East).

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When one tectonic plate moves underneath another, what is occurring?

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The answer is A. subduction

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Five different students in Mr. Garcia's class have done an experiment once, and each one got similar results. What should the st

trapecia [35]

Repeat the experiment

Explanation:

To increase the validity of the results obtained from the single experiment, the students should be encouraged to repeat the experiments more number of times as much as possible.

In an experiment, scientist always try to limit errors by making precise and accurate observation. A single observation does not really represent a precise and accurate finding. When an experiment is repeated as often as possible, the reliability of the conclusion drawn from the hypothesis testing will improve and the results can be accepted to be valid.

A single observation/experiment is not valid enough.

Learn more:

Experiments brainly.com/question/5096428

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