There are pencils, pens, rulers, erasers and textbooks in my schoolbag
Textbooks are not stationery. Just change stationery into school supplies
RELATED INFORMATIONS
- 1. When the eraser is pressed on the blackboard (stationary) by hand, why is the pressure on the eraser not equal to the gravity?
- 2. Is the buoyancy of a 5N object floating on the water equal to or greater than 5N Wu
- 3. How many forces does the eraser absorb on the magnetic blackboard?
- 4. On the formula of acceleration of gravity How is h = 1 / 2GT ^ 2 derived? I know T2 is about S2 in G, but what about half?
- 5. Please design the experiment, measure the atmospheric pressure. Write the required physical quantity and calculate the atmospheric pressure formula There is a straight glass tube with a uniform inner diameter and a length of about 2 meters, a small glass of water, a scale and a plasticine. Please design an experiment to measure the atmospheric pressure, write down the required physical quantities, and calculate the atmospheric pressure formula
- 6. What is the formula of acceleration of gravity
- 7. What is the difference between NBS ω, NBS ω sin ω t
- 8. If four appliances connected with 220 V AC have the same power on time, the one that consumes the most electric energy is () A. Normal luminous bulb with rated power of 100W B. electric iron with maximum current of 0.6A C. electric heater with heating rate of 40J per second D. electric iron with rated current I = 0.5A
- 9. Derivation of physical capacitance formula for senior two students C=εS/4πkd How does the 4 π K on the denominator come out? Try to make it easier to understand~
- 10. How to use the alternating current formula?
- 11. There is a ruler and pen on the desk. This is her and that is his
- 12. Please list out the physical quantities with positive and negative quantities, such as the positive and negative meanings of gravitational potential energy. Some of the positive and negative energies only represent the output, while others are the size?
- 13. Density and buoyancy The volume of an object is 0.5 cubic decimeter, and it weighs 4N. When it is immersed in water, will it sink or float or float
- 14. On the physics of density and buoyancy The density ratio of ice to water is 9:10, so is the ratio of the volume of ice immersed in water to the total volume 9:10
- 15. Density and pressure If the temperature bottle is not filled with hot water and the cork is tightly closed, after a period of time, the cork is not easy to pull out. This phenomenon shows that when the volume is fixed, the temperature of the gas decreases and the pressure of the gas decreases______ Assuming that the external atmospheric pressure is 1.0 x 10 to the fifth power PA, the cross-sectional area of the bottle mouth is 10 cm & sup2;, and a force of at least 20 N is needed to pull out the bottle stopper, the pressure of the gas in the bottle is 0_______ Pa?
- 16. How to measure the density of a pile of pebbles? (there is no balance)
- 17. Measure density: measure the density of small stones without measuring cylinder. (provide: balance, beaker, thin line, water). Write the steps and calculation formula
- 18. Teacher's day English blessing, send English teacher! There is a Chinese translation
- 19. There are 12 teachers in the first grade of a middle school. There are 8 teachers who teach mathematics, 6 teachers who teach physics, 5 teachers who teach chemistry, 5 teachers who teach both mathematics and physics, 4 teachers who teach both mathematics and chemistry, 3 teachers who teach both physics and chemistry, and 3 teachers who teach all these three courses. How many teachers are there other than mathematics and chemistry? How many teachers teach only one course? How many teachers teach just two courses
- 20. What are the best wishes in the teacher's comments