Voltage unit conversion 10 to the 5th power v =? KV 2 * 10 to the - 5th power =? MV 100mV =? V, I'm in a hurry to help

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• 1. Generally, a lightning process takes about 0.0.3s, 17. Usually, a lightning process lasts about 0.0.3s, which is composed of several successive flashes. The duration of each flash is only 40 ~ 80, and the charge transfer mainly occurs in the first flash process. Before a certain lightning, the potential difference between cloud and ground is about 1.0 x 109 V, and the distance between cloud and ground is about 1 km: the charge transferred between cloud and ground in the first flash process is about 6 C, It is assumed that the electric field between cloud and ground before lightning is uniform. According to the above data, the following judgment is correct A. The instantaneous value of lightning current can reach 1 × 105a B. The average power of the whole lightning process is about 1x1014w C. Before lightning, the electric field intensity between cloud and ground is about 1 × 106 V / m D. The energy released during the whole lightning process is about 6 x 106 J
• 2. Rain, cloud, snow, frost, lightning, rainbow, wind and all other atmospheric physical phenomena are called what phenomena? Must be accurate, choose: a climate phenomenon B weather phenomenon C meteorological phenomenon
• 3. When the following electrical appliances work normally, the current passing through is closest to 1a (A. household air conditioner B. household microwave oven C. television D. flashlight)
• 4. How does electricity turn into light through a light bulb?
• 5. How many kilojoules is one gigajoule Such as the title
• 6. One thousand watt hours is equal to 3.600.000 joules, 1 J = 1 Newton force, doing work in the direction of force, 1 meter, 1 kwh = 3.600.00 One thousand watt hours is equal to 3.600.000 joules, 1 J = 1 Newton's force works 1 meter in the direction of force, 1 kwh = 3.600.000j = 3.600.000 Newton's force works 1 meter in the direction of force, 1 meter is equal to 360t's force works 1 meter in the direction of force, right, Does gravity matter
• 7. The rated power of the engine P = 6.0 x 10 of the fourth power W, the mass of the car M = 5.0 x 10 of the third power kg, The rated power P of an automobile engine is the fourth power W of 6.0 x 10, and the mass m is the third power kg of 5.0 x 10 (1) it is necessary for the vehicle to move at a constant speed while maintaining rated power,
• 8. A car with a mass of 4.0 * 10 to the power of 3 kg, a car with a static starting force of 6.0 * 10 to the power of 3, and a car with a resistance of 4.0 * 10 to the power of 3 For a car with a mass of 4.0 * 10 to the power of 3 kg, the traction of the car is 6.0 * 10 to the power of 3, and the resistance is 4.0 * 10 to the power of 3. Calculate the acceleration of the car and the speed at the end of 20 seconds A ⊥ 244 [1 / 2] what is the background of the signing of the Treaty of Shimonoseki? What are the impacts on the nature of Chinese society? What is the historical significance of listing two important battles during the Anti Japanese war? What are the necessary conditions for Cameron to become British Prime Minister? To whom should the new cabinet headed by him be responsible? Summarize the influence of British bourgeois representative system on British history and answer in order!
• 9. The power of automobile engine is 6 times 10 to the fourth power W, and the resistance is 1800n. Under the rated power, find the driving speed
• 10. When the vehicle with a mass of 5t runs on a straight road, the resistance is 0.1 times of the vehicle weight, and the rated power of the engine is 60kW If the car starts to do uniform acceleration linear motion from standstill, it will reach rated power after 6 seconds. G = 10m / s 1) The maximum speed a car can reach 2) When the speed of the car is 10m / s, the power has reached the rated power. What is the acceleration at this time? 3) The acceleration of the car in the process of uniform acceleration Little girl, thank you first!
• 11. Lightning is a kind of discharge phenomenon in the atmosphere. The speed of lightning light is 3.0 * 10 quintic power. If there is a lightning that has experienced 0.0025s, then the lightning light is in the air What's the distance?
• 12. Problems in the experiment of electrolyzing water In the electrolytic water experiment, there are three glass tubes a, B and C. tube a is positive, tube B is negative, and tube C is filled with water, which can flow to the positive and negative stages, that is, the one in the middle of them. Excuse me, when the power is on, what is the phenomenon in tube C? What is the reason for the phenomenon?
• 13. Electrolytic water experiment I want to do the electrolytic water test! But I don't know how many volts the power supply needs to be qualified! Is the ordinary 1.5V dry battery OK?
• 14. What are the following ways of energy conversion It's warm to eat food in winter Stir the water in the cup to make it warm Electric oven food
• 15. The circuit in which the current comes out of the positive pole of the power supply and directly returns to the negative pole of the power supply without passing through the electric appliance is called the circuit
• 16. From the positive side of the power supply to the negative side, the electric energy will be consumed along the way, so the current eye circuit gradually weakens. Right, why
• 17. The simplest circuit consists of four parts, which are the power supply of (), the wire that converts electric energy into other forms of energy (), () and the control circuit The simplest circuit consists of four parts: the power supply of (), the wire that converts electric energy into other forms of energy (), and the wire that controls the circuit on and off
• 18. When a consumer is connected to the lighting circuit for 5 minutes, the energy consumed is 3.3 × 10 to the fifth power J, then the current passing through the consumer is（ When a consumer is connected to the lighting circuit for 5 minutes, the consumed electric energy is 3.3 × 10 to the fifth power J, then the current passing through the consumer is () a
• 19. Does the current consume as much power as it does A said that electrician and current are the same physical quantity. There is no difference between them. They are equal in size B: how much work does the current consume Are they all right? B why not? A why not? I'm adding 20 points. Is that ok?
• 20. All electrical appliances can convert electric energy into energy