How much energy is a Joule? What can it do?

How much energy is a Joule? What can it do?

Lift an object of 1n (0.1kg on the ground) for one meter

Simple calculation of 14.21-14.21 * 0.7

14.21-14.21*0.7
=14.21*(1-0.7)
=14.21*0.3
=4.263

What is the revelation of fish swimming in the water that human beings invented?

Submarine ~ fish bubble~

2 and 7 / 9-7 / 9

2

The calorific value of charcoal is 34 times 10 to the 7th power coke. How many joules of heat is emitted by the complete combustion of 05kg charcoal per kilogram

1.7 times 10 to the 7th Joule 1.7 times 10 to the 7th Joule

1. Dig a cylindrical reservoir in Tongyi village, with an inner diameter of 6 meters. If you want to make this reservoir capable of storing 141.3 cubic meters, at least how deep should you dig? (use equation solution)
2. A cylinder gasoline barrel with a bottom diameter of 7.8 decimeters. If each cubic meter of gasoline weighs 0.72 kg and the oil barrel weighs 12 kg, how many kg does an oil barrel full of oil weigh?
3. A cylindrical vase with a bottom radius of 8 cm and a height of 25 cm. The outer packing box of the vase is a cuboid. How many square centimeters of hard paper does it need to make such a packing box?
Answer statistics at 8:00 tonight

1.
141.3 divided by x = 3.14 times 3 times 3
x=5
two
3.14 by 3.9 by 3.9 by 12 by 0.72
＋12＝424．641216
3．
16 times 16 times 25 = 6400

The function of electric energy, light energy, heat energy, etc
Who can tell me the function of light energy, electricity energy, heat energy, water energy, sound energy and chemical energy in food?

Light energy can be converted into electric energy, heat energy! Gravitational potential energy of water! And chemical energy in plants! Light can be converted into electric energy through phototube! Light energy can be converted into heat energy through thermal radiation! Light energy can evaporate water into clouds! Light energy can be converted into gravitational potential energy of water! Light energy can be converted into chemical energy in plants through photosynthesis, and then into chemical energy in food Learn energy! Light energy can be converted into electric energy. Electric energy can be converted into sound energy by electromagnetic induction!

Simple calculation by factorization
1. The square of 2008 - 2008 × 16 + 64
2. 3.14 × 55 square - 3.14 × 45 square
3. (1-1 / 4) (1-1 / 9) (1-1 / 16) (1-81) (1-1 / 100)

1. The square of 2008 - 2008 × 16 + 64
=(2008-8)^2=4000000
2. 3.14 × 55 square - 3.14 × 45 square
=3.14*(55^2-45^2)
=3.14*(55-45)*(55+45)
=3.14*10*100
=3140
3. (1-1 / 4) (1-1 / 9) (1-1 / 16) (1-81) (1-1 / 100)
=(1-1/2)(1+1/2)(1-1/3)(1+1/3)……………… （1-1/10）（1+1/10）
=（1/2）（3/2）（2/3）（4/3）………… （9/10）（11/10）
=（1/2）（11/10）
=11/20

How many grams is two

100

If 2A + 3B = 1, then 3-4a-6b=______ ．

3-4a-6b=3-2（2a+3b）=3-2=1．