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3 years ago

7

What happens to your behind when you sit for too long?

2 answers:

tino4ka555 [31]3 years ago

5 0

Becomes numb. Or begins to hurt

lyudmila [28]3 years ago

5 0

Sitting for long hours without any interruption may cause painful neck, swayed back in the long run and sometimes disc damage.

<u>Explanation:</u>

Human bodies are designed to stand upright. Cardiovascular and bowel functions work effectively in that way. Sitting too long may weaken and deplete large leg and gluteal muscles which are significant in walking and stabilizing the body.

It also causes stress and reduced social skills. It can also lead to serious health hazards such as cardiovascular complications, diabetes, imbalances in spinal structure. To avoid all these exercises, yoga, stretching regularly is mandatory.

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A firecracker is thrown downward from a height of 2.75m above the ground, with a speed of 3.15m/s. Ignore air resistance, determ

3241004551 [841]

Here in this question as we can see there is no air friction so we can use the principle of energy conservation

$PE_i + KE_i = PE_f + KE_f$

$mgh_1 + \frac{1}{2}mv_i^2 = mgh_2 + \frac{1}{2}mv_f^2$

now here we know that

$h_1 = 2.75 m$

$v_i = 0$

$v_f = 5.23 m/s$

now plug in all values in above equation

$mg*2.75 + 0 = mgh + \frac{1}{2}m(5.23)^2$

divide whole equation by mass "m"

$9.8*2.75 = 9.8*h + \frac{1}{2}*27.35$

$9.8*h = 13.27$

$h = 1.35 m$

so height of the ball from ground will be 1.35 m

4 0

3 years ago

The number of electrons in a copper penny is approximately 10*10^23. How large would the force be on an object if it carried thi

slega [8]

The charge on the electron is 1.6x10^-19C. So, 10^24 of them will be a charge of 1.6x10^5C, F = q1xq2/[(4pi epsilon nought)r^2]

3 0

3 years ago

Read 2 more answers

Belle is walking south at an average velocity of 6 km/h. How many kilometers can she walk in three hours?

omeli [17]

Answer:

I think the answer is 18 km/h

Explanation:

6 0

3 years ago

4. There is a flashing yellow light at the intersection you are approaching. What does the flashing yellow light indicate, and w

OleMash [197]

It indicates that you should proceed with caution. You should slow down and be prepared to stop to safely navigate this intersection.

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4 years ago

A force in the +x-direction with magnitude F(x)=18.0N−(0.530N/m)x is applied to a 8.90 kg box that is sitting on the horizontal,

Lady_Fox [76]

Answer:

6.875 m/s

Explanation:

The force is variable which is given by

F(x) = 18 - 0.53 x

mass of the box, m = 8.9 kg

initially it is at rest at x = 0

Let the velocity is v after travelling a distance of 15 m.

According to the work energy theorem, the work done by all the forces is equal to the change in kinetic energy of the body.

Work done = change in kinetic energy

$\int \overrightarrow{F}.d\overrightarrow{x}=\Delta K.E$

$\int_{0}^{15} \left ( 18-0.53 x \right )dx=\frac{1}{2}\times m \left ( v^{2}-u^{2} \right )$

$\left ( 18x-0.265x^{2} \right )_{0}^{15}=\frac{1}{2}\times 8.9\times \left ( v^{2}-0^{2} \right )$

18 x 15 - 0.265 x 15 x 15 = 4.45 x v²

270 - 59.625 = 4.45 v²

v² = 47.275

v = 6.875 m/s

Thus, the final velocity of the box is 6.875 m/s.

4 0

3 years ago