Physics, 02.11.2019 13:31 elizabethann2

Meg goes swimming on a hot afternoon. when she comes out of the pool, her foot senses that the pavement is unbearably hot. suppose meg wants to apply the scientific method to discover reasons for the hot pavement. what is the next step she should take?
a)analyze the data
b)ask questions
c)communicate the results
d)make observations

Answers: 3

Show answers

Answers

Answer from: agerald

B) ask questions. Meg should ask a question first so she can learn more about why the pavement felt so unbearably.

Answer from: tylerkitchen44

b) ask questions

Explanation:

Meg senses that pavement feels hot when she comes out of the pool. In order to discover the reason behind using scientific method, she should first formulate a question. Based on it should hypothesis and then design experiment to test the hypothesis. next step would be to make observations, collect data, analyze it and draw conclusions. The final step would be to communicate the results.

Thus, correct option is b.

Answer from: Quest

Hey hope you get the answer but i suck at math sorry : (

Answer from: Quest

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

$x(t)=ax(x-6)$

where $a$ is unknown. because the position is parabolic, there is symmetry about the midpoint at $t=3$ , and we know that

$x(3)=10\implies -9a=10\implies a=-\dfrac{10}9$

so that the position function is

$x(t)=-\dfrac{10}9x(x-6)$

which means the velocity is

$v(t)=\dfrac{\mathrm dx}{\mathrm dt}=-\dfrac{20}9x+\dfrac{60}9$

then the total distance traveled is

$\displaystyle\int_{t=0}^{t=6}|v(t)|\,\mathrm dt=\left\{\int_{t-0}^{t=3}-\int_{t=3}^{t=6}\right\}v(t)\,\mathrm dt=20$

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at $x=0$ and ends at $x=0$ , so its displacement is 0.

Another question on Physics

Physics, 21.06.2019 19:40

An ideal spring has a spring constant (force constant) of 2500 n/m, is stretched 4.0 cm, how much elastic potential energy does it possess? (a) 3j (b) 0.00j (c) 1j (d) 2j (e) 4j

Answers: 1

Answer

Physics, 22.06.2019 02:10

Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?

Answers: 1

Answer

Physics, 22.06.2019 05:00

Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above

Answers: 1

Answer

Physics, 22.06.2019 09:10

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Answers: 1

Answer

You know the right answer?

Meg goes swimming on a hot afternoon. when she comes out of the pool, her foot senses that the pavem...

Questions