All categories

2 years ago

When practicing deep breathing, it is best to repeat the steps for

Physics

2 answers:

GrogVix [38]2 years ago

8 0

Answer:

c.) 10 to 15 minutes

Explanation:

Alborosie2 years ago

6 0

Answer:

c.) 10 to 15 minutes

Explanation:

yw :)

You might be interested in

A car and a train move together along straight, parallel paths with the same constant cruising speed v(initial). At t=0 the car

kogti [31]

Answer:

$t_1 = \frac{v_i}{a_i}$

$t_2 = \frac{v_i}{a_i}$

Δd = $v_it_1 = v_i^2/a_i$

Explanation:

As $v(t) = v_i + at$ , when the car is making full stop, $v(t_1) = 0$ . $a = -a_i$ . Therefore,

$0 = v_i - a_it_1\\v_i = a_it_1\\t_1 = \frac{v_i}{a_i}$

Apply the same formula above, with $v(t_2) = v_i$ and $a = a_i$ , and the car is starting from 0 speed, we have

$v_i = 0 + a_it_2\\t_2 = \frac{v_i}{a_i}$

As $s(t) = vt + \frac{at^2}{2}$ . After $t = t_1 + t_2$ , the car would have traveled a distance of

$s(t) = s(t_1) + s(t_2)\\s(t_1) = (v_it_1 - \frac{a_it_1^2}{2})\\ s(t_2) = \frac{a_it_2^2}{2}$

Hence $s(t) = (v_it_1 - \frac{a_it_1^2}{2}) + \frac{a_it_2^2}{2}$

As $t_1 = t_2$ we can simplify $s(t) = v_it_1$

After t time, the train would have traveled a distance of $s(t) = v_i(t_1 + t_2) = 2v_it_1$

Therefore, Δd would be $2v_it_1 - v_it_1 = v_it_1 = v_i^2/a_i$

8 0

2 years ago

Human skin color varies widely around the world, and children do not always exhibit the exact same coloring as their parents. Ba

Ostrovityanka [42]

I would say Its an example of polygenic inheritance because The determination of a particular characteristic, e.g. height or skin colour, by many genes (polygenes), each having a small effect individually. Characteristics controlled in this way show continuous variation.

3 0

2 years ago

Read 2 more answers

Pedro uses a bar magnet to pick up a nail. He then

lisabon 2012 [21]

The nail has become a temporary magnet, while the

bar magnet remains a permanent magnet.

7 0

2 years ago

Read 2 more answers

PLEASE HELP... one early morning Revell went to her car to go to school. she noticed that her entire car was covered w a thin la

Romashka-Z-Leto [24]

Meiosis is the correct answer because of the fact all the other answers are no where near correct

4 0

2 years ago

Suppose that 2 J of work are needed to stretch a spring from its natural length of 30 cm to a length of 42 cm. How far (in cm) b

sergeinik [125]

A distance of 10.8 cm beyond its natural length will a force of 30 N keep this spring stretched

<u>Explanation:</u>

Work, W = 2 J

Initial distance, $x_{1}$ = 30 cm

Final distance, = 42 cm

Force, F = 30 N

Stretched length, x = ?

We know,

W = 1/2 kΔx²

Δx = 42-30 cm = 12 cm = 0.12 m

2 J = 1/2 k X (0.12)²

k = 277.77 N/m

According to Hooke's law,

F = kx

30 N = 277.77 X x

x = 0.108 m

x = 10.8 cm

A distance of 10.8 cm beyond its natural length will a force of 30 N keep this spring stretched.

7 0

2 years ago