Today I Learn

2021-04-11 09:26:07 How to Walk Freely with your Dog

A study on dog walkers has found that people who walk their dogs while they pull on the leash are more likely to have injuries and fractures.

This is especially true for older dog walkers who are more at risk of sustaining an injury.
Because the dog is pulling on your outstretched arm, it can pull you off balance and puts pressure on your shoulders, elbows, and wrists. You may get sprains in your hands as well as wrist and elbow ligament injuries.

Instead, it’s recommended to walk with your dog close to you on your left when you have it on a leash.

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2021-04-11 08:38:32 Why is mercury used in thermometer?

Mercury is the only metal which is in liquid state even at the ordinary room temperature. Also, it uniformly expands when heated and does not stick to the walls of thermometer. Its high boiling point and low freezing point is the main reason for using it in ordinary thermometers.

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2021-04-11 01:57:39 Why does the ice float on water while it sinks in alcohol?

The specific gravity of ice is less than that of water but the same is more than that of alcohol, hence ice floats on water but sinks in alcohol.

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2021-04-10 09:55:46 Open / Comment

2021-04-10 09:55:44 ​​How do pimples form?

Our Skin is covered in millions of tiny little pores, that sit at your hair follicles. Pores connect the surface of your skin to an underlying gland called the Sebaceous gland. This gland produces an oily substance called sebum which is released continually, in small amounts, into the hair follicles and skin. Dead skin cells are also carried up with the sebum so they can be washed away.

Occasionally, the sebaceous gland produces too much sebum. The overflow of oil can clog the pore. Excess oil and dead skin cells form a plug in the gland. This pore becomes clogged with sebum, oil, and possibly bacteria. These bacteria multiplies and can lead to an infection, swelling, and inflammation around the clogged pore. A white tip of pus will sometimes form at the top of the clogged pore. This creates a pimple.

Pimples are most likely to occur during the teenage years and around menstruation(for women) because during these times hormone production changes and the sebaceous glands become overactive.

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2021-04-09 11:57:06 #Productivity Life Pro Tip:

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Walking 3 miles will burn more calories than running 1 mile. It is easier to walk 3 miles while listing to a podcast, music, audiobook, etc.

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2021-04-09 02:51:37 How is hair produced and how does it grow?

Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin. The hair bulb forms the base of the hair follicle. In the hair bulb, living cells divide and grow to build the hair shaft.

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2021-04-08 06:58:05 What countries border the Black Sea?

The Black Sea is an inland sea located between far-southeastern Europe and the far-western edges of the continent of Asia and the country of Turkey. It's bordered by Turkey, and by the countries of Bulgaria, Romania, Ukraine, Russia and Georgia.

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2021-04-08 03:12:12 ​​What is Lagrange Point?

Lagrange Points are positions in space where the gravitational forces of a two body system like the Sun and the Earth produce enhanced regions of attraction and repulsion. These can be used by spacecraft to reduce fuel consumption needed to remain in position.

Lagrange points are named in honor of Italian-French mathematician Josephy-Louis Lagrange.

There are five special points where a small mass can orbit in a constant pattern with two larger masses.

The Lagrange Points are positions where the gravitational pull of two large masses precisely equals the centripetal force required for a small object to move with them.

This mathematical problem, known as the "General Three-Body Problem" was considered by Lagrange in his prize winning paper (Essai sur le Problème des Trois Corps, 1772).

Of the five Lagrange points, three are unstable and two are stable. The unstable Lagrange points - labeled L1, L2 and L3 - lie along the line connecting the two large masses.

The stable Lagrange points - labeled L4 and L5 - form the apex of two equilateral triangles that have the large masses at their vertices. L4 leads the orbit of earth and L5 follows.

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2021-04-08 03:11:25 Open / Comment