If congcongcong wants to leave home at 8:00, can he walk 85 meters per minute? I will, (*^__ ^*(hee hee 15 × 60 = 900m 8: 10-8:00 = 10 minutes 900 divided by 10 = 90 90 m is greater than 85 m No

If congcongcong wants to leave home at 8:00, can he walk 85 meters per minute? I will, (*^__ ^*(hee hee 15 × 60 = 900m 8: 10-8:00 = 10 minutes 900 divided by 10 = 90 90 m is greater than 85 m No

Since you will, happy every day
However, you haven't finished your question. Don't be too careless

A fan-shaped statistical chart shows that medical books account for 25% of the total, agricultural books account for 40% of the total, and other books account for 35% of the total

16000 △ 25% = 64000 copies
There are 64000 copies

How many joules does 1eV equal

1.6×10∧-19J

(- 99 15 / 16) × 8

Natural gas is a kind of clean energy. How much heat can a cubic meter of natural gas give out when it is completely burned. (calorific value is 7.1 × 10000000j / cubic meter)
At this time, I have the answers to the 19 questions in the 2007 senior high school entrance examination
What is needed is the process

Q = VQ = 1 m3 x 7.1 × 10000000j / m3 = 7.1 × 10000000j

The solution equation: X – 60% x = 18 35 x + 2.5 × 8 = 95 40% x + 30 = 80
If there is one, it is

First: x = 18 / (1-0.6) = 45
Second: x = (95-2.5 * 8) / 35 = 75 / 35 = 25 / 7
Third: x = 50 / 0.4 = 125

Can solar, wind and tidal energy be directly converted into other forms of energy?
At present, the new energy sources we use are solar energy, wind energy and tidal energy. They are converted into electric energy and then into other forms of energy. However, a lot of energy will be digested in the process. If we can directly convert solar energy, wind energy and tidal energy into other forms of energy, most of the energy will be saved. Is that ok?

The transmission and use of electric energy is convenient and simple, so it is widely used
. into electrical energy, electrical energy into other forms of energy, but in the process of digestion (consumption?) a lot of energy - no, I can't think of any other form of energy more efficient than this

Decomposition factor: A & # 178; - 9b & # 178; + 2a-6b

300 kJ, how many calories are left

Specifically, one calorie of energy or heat can raise the temperature of one gram of water by one degree Celsius. One calorie is equal to 4.184 joules (joules are commonly used in Physics)
300 kJ = 300000 kJ ≈ 71701.72 calories

Given that the function y = Sin & # 178; X + asinx-a & # 178; + 2A + 6 has the maximum value 2, find the value of real number a

Let t = SiNx, then | t | = 0, y (1) > = y (- 1), from Y (1) = 2, a ^ 2-3a-5 = 0, take the root of a > = 0 as a = (3 + √ 29) / 2
Ay (1), from Y (- 1) = 2, a ^ 2-a-5 = 0, take a