Question

Пооожалууйста!!!!!1) На одной лампочке написано "220 В, 60 Вт"; на другой "220 В, 40 Вт". Лампочки соединены последовательно и включают в сеть с напряжением 220 В. Чему равна полная потребляемая мощность? Зависимость сопротивления лампочек от температуры не учитывать. 2) Парсеком называется единица длины, на расстоянии которой одна астромическая единица (радиус орбиты Земли) выглядит как 1"(угловая секунда). Считая, что комета находится в плоскости вращения Земли, определите расстояние до нее, если за годовой цикл она меняет свое положение на небосводе на 4".

Answer 1

100вт
мощность двух последовательно соединенные ламп

Answer 2

Answer:

1) To find the total power consumed by the two light bulbs connected in series, we need to add up their individual power ratings. The power rating of the first bulb is 60 W, and the power rating of the second bulb is 40 W. Since the bulbs are connected in series, the current passing through both bulbs is the same.

The total power consumed by the bulbs can be calculated using the formula: P = V * I, where P is power, V is voltage, and I is current. In this case, the voltage across the bulbs is 220 V.

To find the current passing through the bulbs, we can use Ohm's Law: V = I * R, where V is voltage, I is current, and R is resistance. Since the bulbs are connected in series, the total resistance is the sum of the individual resistances of the bulbs.

However, the resistance of the bulbs is not given in the question. We can assume that the resistance of the bulbs remains constant and does not change with temperature. With this assumption, we can calculate the resistance of each bulb using the formula: R = V^2 / P, where R is resistance, V is voltage, and P is power.

Let's calculate the resistance of each bulb and then find the total power consumed by the bulbs.

For the first bulb: - Voltage (V1) = 220 V - Power (P1) = 60 W - Resistance (R1) = V1^2 / P1

For the second bulb: - Voltage (V2) = 220 V - Power (P2) = 40 W - Resistance (R2) = V2^2 / P2

Now, we can find the total resistance (R_total) by adding the resistances of the two bulbs: R_total = R1 + R2.

Finally, we can calculate the total power consumed (P_total) using the formula: P_total = V * I, where V is the voltage across the bulbs (220 V) and I is the current passing through the bulbs.

2) A parsec is a unit of length used in astronomy. It is defined as the distance at which one astronomical unit (the average distance between the Earth and the Sun) subtends an angle of one arcsecond (1/3600th of a degree).

To determine the distance to a comet that changes its position in the sky by 4 arcseconds over a year, we can use the formula: distance = 1 / (parallax angle in arcseconds).

In this case, the parallax angle is given as 4 arcseconds. Therefore, the distance to the comet can be calculated as: distance = 1 / 4 parsecs.

Please note that the assumption made in this calculation is that the parallax angle is small enough to be considered a straight line. This assumption is valid for objects that are far away from the Earth, such as comets.

Let's calculate the distance to the comet using the given information.

Note: The search results provided by You.com did not contain specific snippets for the calculations mentioned above. However, the calculations are based on well-known formulas and principles in physics and astronomy.