Что является общим в строении атомов бериллия, магния и кальция?

Определите силу тока в проводнике R2 и напряжение на проводнике R1, если ЭДС источника равна Е=2 В, а его внутреннее сопротивление равно r=0,4, R1= 6 Ом, R2= 9Ом

Сори за кривой чертёж

you can... a car at the airport Помогите вставить слово( в слове 4 буквы)

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The best lifestyle – to live happy long life

If you want to live a long, rich life, one of the best things you can do is to fill that life with happy feelings. How to live a happy life is something all of us want to know. Who doesn’t want to enjoy a healthy, happy life for as Long as possible? There are many ways to do this, and they’re incredibly easy.

Numerous poor habits, such as drinking, smoking and stress only add towards reducing our life by several years. Although a healthy diet can largely contribute towards our longevity, leading a healthy and longer life is not confined to treadmills and salads only. Nonetheless, the innovation and development of technology has unleashed few longevity secrets that assure people living for at least 100 years. All thanks to the hard science of medicine that is in constant research to add on some more fruitful and enjoyable years to your life. Given below are some tips for increasing your life, thus promoting a longer, healthier and livelier life.

 Healthy Diet

Certainly, consuming healthy food is one of the best ways to boost your body health. Have lots of vegetables, whole grains and fruits.  These foods provide the essential micro-nutrients necessary for the development of the body. Conversely, stop eating fried and oily food. Though these foods look tempting, isn’t it better to eat healthy food rather than yummy food!

 Smile Away your Stress!

Smile, smile, then smile some more! A little happiness can take up your life to several notches. Apart from improving your attractiveness and immune system, a smile largely enhances your health by reducing stress. Smiling is highly useful in enhancing mood, lowering blood pressure, stimulating the release of serotonin to offset depression, and enhancing the release of ‘feel good’ hormones known as endorphins. Most important of all, a smile sets you in a positive frame of mind.

 Love Exercise & Fitness

Exercising and physical activities are, indeed, the best ways to keep your mind and body healthy, thereby promoting a long and fit life. Exercise is very essential for keeping your weight under control, lowering blood pressure and cholesterol, and warding off lifestyle diseases. A few simple exercises are sufficient for your body to remain flexible, strong and robust.

 Sleep Well

Sleeping for less than 6 or 7 hours leads to the risk of various lifestyle diseases that can get severe in some cases, such as heart disease and stroke. Hence, it is recommended that you get a sound sleep of about 7 to 9 hours each night to keep your heart and body healthy. A good sleep is important for an alert brain, strong memory and reduced stress. It also helps in fighting depression, improving performance, staying happy and, most significant of all, living longer.

 Enjoy Dark Chocolate

With a large amount of antioxidants and chemicals called phenols, dark chocolate is another great way to increase your life. Also, it lowers blood pressure and cholesterol thereby providing your body an instant energy boost. Furthermore, researches have found people who consume moderate amount of dark chocolate are likely to live longer than those who consume sweets three or more times a week, and those who have never touched sweets.

Составьте схемы строения электронных оболочек атомов:

а)  рубидия; б) стронция; в) иттрия; г) циркония. Чем они отличают­ся?