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jok3333 [9.3K]
3 years ago
13

Plz help brainliest plzzzzzzzzzzzzzzzzz!!!!!!!!!!!!!!

Physics
1 answer:
Likurg_2 [28]3 years ago
8 0

Answer:

b

Explanation:

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How would I use “Newton#1: Laws of Motion” in a sentence?
Anit [1.1K]

You would say "in Newtons !st law (state what it is) then continue on with the rest of your sentence! ;3

3 0
3 years ago
The charge that passes a cross-sectional area A=10-4 m2 varies with time according
Anarel [89]

Answer:

Current = dQ/dt

or I = dQ/dt

Where I represents current.

Which is the rate of flow of charge.

Q=4 + 2t + t²

dQ/dt = 2 + 2t --- This is the relation that gives the instantaneous current.

At time t=2sec

dQ/dt = I = 2 + 2t

= 2 + 2(2)

=2 + 4

= 6A.

6 0
3 years ago
An 82 g arrow is fired from a bow whose string exerts an average force of 95 n on the arrow over a distance of 77 cm. what is th
Zigmanuir [339]
You need to find speed, v.
And you (should) recognize the famous F=ma.

We've got data for F and m, so we can find a first!
a =  \frac{f}{m}
a = 95N / 0.082 kg


Now from a we nees to find v. But how is v and a related?
a =  v \times \frac{dv}{dx}
where dv is the change in speed (some unknown v minus zero since arrow is initially at rest). dx is the distance where the arrow experiences a force (77 cm!).

Now you know values for a, dv, and dx... you can plug those in and find v!



5 0
3 years ago
Researchers are investigating whether people who exercise with a training partner have a greater increase, on average, in target
liubo4ka [24]

<u><em>[NOTE: THIS IS INCOMPLETE QUESTION. THE COMPLETE QUESTION: Researchers are investigating whether people who exercise with a training partner have a greater increase, on average, in targeted exercise intensity compared with people who exercise alone. Two methods of collecting data have been proposed. Method i: recruit volunteers who are willing to participate. Randomly assign each participant to exercise with a training partner or to exercise alone. Method ii: select a random sample of people from all the people who exercise at a community fitness center. Ask each person in the sample whether they use a training partner, and use the response to create the two groups.]</em></u>

In method I, the population generalization is almost random, hence it uses a random sample. In method II, the population generalization is less random, hence it uses a biased sample.

In terms of population generalization, the two methods differ. In method I where participants randomly assign each participant to exercise with a training partner or to exercise alone from the volunteers who are willing to participate, the sampling method is almost random as it includes people who are exercise regularly (in majority) and those who do not exercise regularly. Due to the randomized nature of the sample, the results can be applied to the entire population.

In method II where sampling is done by selecting a random sample of people from all the people who exercise at a community fitness center and determining if they use a training partner or exercise alone to create the two groups. As the people included in the sample are less random as they work out regularly at the fitness center. Hence, the sample is biased as it does not include any representation of people who do not work out regularly. The results cannot be used to apply to the entire population generalization.

Therefore, Population generalization is generalizing the population into two categories out of which one is more random in selection than the other.

Learn more about Population generalization, refer: brainly.com/question/26238937

#SPJ4

4 0
1 year ago
How would life on earth be different if its axis was not tilted with respect to its orbit?.
borishaifa [10]

Answer:

oone side at a time would be hot and the other oone

Explanation:

One side will be hot and the other cold no in-between

3 0
2 years ago
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