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Joule to megajoule conversion How many million kilojoules is 648 million joules
648000000 / 1000000 / 1000 = 0.648 MJ
How to create (convert, to be exact) one joule of energy?
You can't rely on your own energy conversion. Solar energy, kinetic energy, potential energy, etc. can be used to reflect the energy of one joule. Be creative.
Work is a measure of energy conversion. Doing 1J work converts 1J energy. A 0.1kg ball drops 1m to obtain 1J kinetic energy
How many kilogram meters is one joule
One joule is one Niu per meter, one kilogram is ten Niu
When a heavy object is pulled by a rope, it moves downward (vertically). In this process, there is gravity and the pulling force of the rope. The mechanical energy must not be conserved. At this time, the direction of the pulling force is opposite to the direction of motion. If you do negative work, the mechanical energy will decrease
But in an electric field, for example, if the field source charge is +, a negative point charge - moves far away, and the electric field force does negative work, why do we say that TV can increase that?
Is the positive work energy increased or the negative attack energy increased?
The first one is that mechanical energy is not conserved. Because the work done by gravity is used to overcome the pulling force instead of converting it into kinetic energy. In addition to the work done by gravity (or the work done by elastic force in the system with spring), if there is external force to do work, such as external force balance, then mechanical energy is also conserved. If there is external force imbalance, then mechanical energy is not conserved
Second: if the electric field force is negative, the electric potential energy will certainly increase
For example: lift the weight up, gravity does negative work, and the potential energy of gravity increases
RELATED INFORMATIONS
- 1. The object with mass m stands still on a smooth horizontal plane and is subjected to a horizontal force from the moment t = 0. The relationship between the magnitude of the force F and the time t is shown in the figure. If the direction of the force remains unchanged, then () A. The instantaneous power at 3t0 is 5f02t0mb. The instantaneous power at 3t0 is 15f02t0mc. The average power of horizontal force is 23f02t04md from t = 0 to 3t0. The average power of horizontal force is 25f02t06m from t = 0 to 3t0
- 2. When the sliding rheostat R is adjusted and the motor is stopped, the indication of ammeter and voltmeter are 0.50a and 2.0V respectively. When R is re adjusted and the motor returns to normal operation, the indication of ammeter and voltmeter are 2.0A and 24.0V respectively. Then the output power and internal resistance of the motor are normal They are () A. 32W and 4 Ω B. 48W and 4 Ω C. 32W and 12 Ω D. 48W and 12 Ω
- 3. What about Joule Lenz's law? 1: Is Joule Lenz's law a person? 2: Joule Lenz law I read in a book that the heat generated by a circuit is directly proportional to the square of the current intensity, the resistance, and the time of the current flowing. Later, I thought, it's not quite right. First, in a circuit, of course, the larger the resistance is, the greater the heat generated, the smaller the line resistance is, the smaller the power transmission is, and the smaller the loss is. Of course, the smaller the heat generated, but on the other hand, for example, the electric furnace, The smaller the resistance of the electric furnace wire, the greater the power, and the greater the heat generated. How can it be reversed?
- 4. Physics problems about Joule's law The unit length of a wire is 0.01 Ω / m, which is now used for household circuit power supply. The resistance of the electric furnace at 100m is about 48 Ω. How much heat does the wire generate per minute? If the electric furnace is short circuited, how much heat does the wire generate per second?
- 5. Do you need to adjust the ohm to zero after measuring the resistance of 4 ohm and 5 ohm with the ohm gear of the multimeter Do you need to adjust the ohm to zero after measuring the resistance of 4 ohm and 5 ohm respectively with the ohm gear of the multimeter
- 6. A lamp is connected to the home circuit. The current passing through is 0.2A. How about the electric power of the lamp?
- 7. What is the electric power of the bulb marked with "3V 3W" when passing 0.2A current?
- 8. What kind of energy does a hair dryer turn into when it blows cold air
- 9. If you want to change the hair dryer to make the temperature of hot air higher, you should connect a resistance wire to the original resistance wire
- 10. Is the motor and resistance wire in the hair dryer in series or in parallel
- 11. One resistor R1 is marked with "10 ohm 3A" and the other resistor R2 is marked with "50 ohm 1.5A". Now R1 and R2 are connected in parallel After connecting to the power supply, what is the maximum circuit on the trunk road?
- 12. The known resistance R = 6 Ω is connected in parallel with the unknown resistance R2, and the measured current passing through the circuit is 4a, if R1 R2 is connected in series to the same circuit, and the voltage at both ends of R2 is 6V. The power supply voltage and R2 are calculated
- 13. The resistance of a 25 watt bulb on a lighting circuit is 1936r, 1, find the voltage U? 2. If a 60 watt bulb is replaced on this circuit, what are the resistance and current of the bulb?
- 14. The resistance of a household electric soldering iron is 484 Ω. How much electric energy does it consume when it works normally for 10 minutes
- 15. The difference between Newton's view of time and space and Einstein's view of time and space
- 16. Is it right to say that Newton's mechanics is relative truth and Einstein's theory of relativity is absolute truth
- 17. Archimedes, Newton, Gauss, Euler. Who is the greatest mathematician
- 18. Archimedes, Newton and Gauss are called the three heroes of mathematics. Archimedes is called the God of mathematics. Gauss is the prince of mathematics. What is Newton?
- 19. Why Galileo is "the father of modern science", but it is Newton's classical mechanics system that marks the beginning of the era of human science?
- 20. Galileo died. Was Newton born in the same year rt