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1. ### 1KG的球,要向地面施多少N才能離地80cm

Your question is too vague. If you are raising the ball upt ot 80 cm from ground, the force you exert on the ball is...

2. ### GreenHouse Gases(urgent_)

1) Greenhouse gases are the gases that make the earth raise the tempearture. These gases are so large that cause the unbalance...

3. ### 水&冰,邊個冷D(10分!)詳情在入面~

... in J C-1 kg-1. It is the energy needed to raise 1 C of a block of 1 kg. If a substance with a high specific heat capacity...

4. ### Specific heat capacity

... a kJ energy per kg K. So, use kJ energy to raise up 1 kg substance for 1 K. . e.g 297 J/kg K is mean...

5. ### PHYSICS E &M SBA

...avoid prolong heating of the resistor and rheostat, as a prolong heating would raise their temperature and hence the resistances. Hence, it ...

6. ### wave motion (urgent)

5. There is work done and hence produce heat, which raises the temperature of the block. 6. Try to draw the "rays", which...

7. ### 問PHY 2000 CE MC Q.11 AND Q.12

11. The answer is C. For 1, as the block is raising , so there is a gain in potential energy of the block. So 1 is correct...

8. ### 物理熱學問題 熱與內能

...of air inside the room = (4x5x7) x 1.2 kg = 168 kg Heat required to raise the room air from 10'C to 20'C = 168 x 1000 x (20-10) J...

9. ### equipartition of energy?

...of the gas, then 0.148 × 4200 = 621.6 J of energy is needed to raise its temperature by 1 K. So, in view of the formula E = (3...

10. ### Electromagnetic Induction 01

As soon as the load is raised , the rotation speed of the motor will decrase. Then, by the formula: Back...