Резисторы сопротивлением 12 Ом и 6 Ом соединены последовательно.Сила тока в цепи 1,8А.Найдите общее напряжение.

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1)Какую работу надо совершить чтобы передвинуть диван массой 130кг на 80 см? 2)Какой должна быть температура нагревания, чтобы КПД тепловой машины достигло значения 75% если температура холодильника 17°С 3)Определить показатель преломления среды, если световой луч падает под углом 51° и преломления под углом 29° 4)определить число протонов, нейтронов и электронов в атоме эйнштейния осуществить a- и в- распад данного элемента.

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Reported the sentences in indirect speech 1 "My uncle and aunt dont know where I am" said Dorothy. 2 " They are terribly frightened" thought Dorothy. 3 "What is your name dear child?" asked the old woman. 4 "Where is the city?" asked dorothy. 5 "We cannot go with you", said the little men. 6 "I hope you will find the Wizard," said the Good Witch

Английский язык

admin 13.12.2022 105

Найдите область определения функции.

Математика

admin 13.12.2022 96

Каков поток магнитной индукции через контур индуктивностью 243 мГн с током 0,41 A?

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Помогите решить 3 задачу

Математика

admin 13.12.2022 117

СРОЧНО НУЖНА ПОМОЩЬ ДАЮ ВСЕ БАЛЛЫ ЧТО ЕСТЬ Напишите 5 вопросов к предложению из текста (общий, специальный, альтернативный, разделительный, вопрос к подлежащему). Welding is a process when metal parts are joined together by the application of heat, pressure, or a combination of both. The processed of welding can be divided into two main groups: pressure welding, when the weld is achieved by pressure and heat welding, when the weld is achieved by heat. Heat welding is the most common welding process used today. Nowadays welding is used instead of bolting and riveting in the construction of many types of structures, including bridges, buildings, and ships. It is also a basic process in the manufacture of machinery and in the motor and aircraft industries. It is necessary almost in all productions where metals are used. The welding process depends greatly on the properties of the metals, the purpose of their application and the available equipment. Welding processes are classified according to the sources of heat and pressure used. The welding processes widely employed today include gas welding, arc welding, and resistance welding. Other joining processes are laser welding, and electron-beam welding. Gas Welding Gas welding is a non-pressure process using heat from a gas flame. The flame is applied directly to the metal, edges to be joined and simultaneously to a filler metal in the form of wire or rod, called the welding rod, which is melted to the joint. Gas welding has the advantage of using equipment that is portable and does not require an electric power source. The surfaces to be welded and the welding rod are coated with flux, a fusible material that shields the material from air, which would result in a defective weld. Arc Welding Arc-welding is the most important welding process for joining steels. It requires a continuous supply of either direct or alternating electrical current. This current is used to create an electric arc, which generates enough heat to melt metal and create a weld. Arc welding has several advantages over other welding methods. Arc welding is faster because the concentration of heat is high. Also, fluxes are not necessary in certain methods of arc welding. The most widely used arc-welding processes are shielded metal arc, gas-tungsten arc, gas-metal arc, and submerged arc. Shielded Metal Arc In shielded metal-arc welding, a metallic electrode, which conducts electricity, is coated with flux and connected to a source of electric current. The metal to be welded is connected to the other end of the same source of current. An electric arc is formed by touching the tip of the electrode to the metal and then drawing it away.The intense heat of the arc melts both parts to be welded and the point of the metal electrode, which supplies filler metal for the weld. This process is used mainly for welding steels.

Английский язык

admin 13.12.2022 106

Ширина прямоугольного участка в 4 раза меньше его длины. Вычислить площадь этого участка, если длина забора, которым он огорожден ,составляет 900м.

Математика

admin 13.12.2022 92

знайдить площу трикутника якщо його основа дорівнює 13 см а висота проведена до цієї основи 8

Математика

admin 13.12.2022 98

Сопротивление R = 100 Oм, ток в цепи I = 0,9 A. Определить количества тепла, выделяемое в течении 10 минут

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