A balloon is filled with a certain mass of gas. When the temperature is constant, the pressure P in the balloon is an inverse proportional function of the balloon volume V, and the coordinates of a point are (1.5,64) 1. Write the analytical formula of inverse proportional function 2 when the volume of the balloon is 0.8m3, what is the air pressure in the balloon 3. When the pressure in the balloon is greater than 144 kPa, the balloon will explode. How many cubic meters should the volume of the balloon be?
2. P = 96 / 0.8 = 120 kPa
That is, the volume of the balloon should not be less than 2 / 3 cubic meters
If you use mathematics, you can do it because of it, but it's wrong to solve it with mathematics. Those formulas are well remembered Solid, just can't write, and then help to say the idea of doing the problem. Thank you, but you have one track record in physics
The biggest difference between physics and mathematics is that the physical units also need to be calculated. In many problems, the calculation must be unified into international units. Your problem may be to solve the problem in the format of mathematics without the same unit. In this way, if you apply the data in the problem, it must be wrong. You must pay attention to using the standard
Hurry! How to break through physics and mathematics quickly in one night in tomorrow's monthly exam Physics test linear motion, interaction, Newton's law... Mathematics test function, trigonometric function... Help... Help
Look at the problem-solving steps of the example, try to understand and do it. If it's really too late, recite the example and formula. At least write the formula and a formula score. This is the only bad plan for one night
I'm almost in grade three now. My grades have always been good in physics. I want to improve my math grades, Moreover, my math scores are very unstable, and my understanding is not very good. Teachers and parents have high expectations of me. Do I have to ask questions? I have been working hard. Please don't pull an article on the methods of learning mathematics to perfunctory me. I really want to improve my math,
EN en @@ you're like me! My grades in grade three and grade two have always been very good, that is, mathematics was bad. At that time, I went with him. The result of the midterm exam was terrible! I'm now crazy about Naval Warfare! I really regret that I didn't do a question when I was so empty on the second day of junior high school! It's hard to catch up now @@ so, Xuemei! certain...
1. Use a measuring cylinder, water and a fine needle to measure some physical quantities of wood blocks A. Can only measure the volume of wood blocks? B. Can only measure the buoyancy of the wood block? C. Can only measure the volume, mass and density of wood blocks? D. The volume, buoyancy, mass and density of wood blocks can be measured 2. Put a block into water, in which the block will fall at a uniform speed. If the block is immersed in salt water, the block will eventually () A. Floating B. levitation? C. It's possible to sink to the bottom D
The volume of the first question can be measured. Just press the wood block into the water with a needle. Because the needle is very thin, the volume can be ignored, plus buoyancy, so you should choose D
The second question is because it falls at a uniform speed, so the density of this material is equal to that of water. The density of brine is higher, choose a
What is the difference between a variable speed bicycle and an ordinary bicycle? concrete!
The most obvious thing is that the appearance is different. In addition, in terms of performance, variable-speed bicycles are more autonomous than ordinary bicycles: 1. If you want to keep fit, you can adjust the performance, strength Speed, etc. 2. If you want to save effort, you can also adjust the position of the gear plate and chain. 3. Another important difference is that the price of variable-speed bicycles under the same brand is higher than that of ordinary bicycles