Can a chemistry teacher teach physics?
Yes. Our teacher, the thing is one
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- 2. Teacher's Day is coming, I want to write some blessings to 8 teachers I want to write some blessing words to teachers of 8 subjects Each subject's blessing should be related to the subject's knowledge: for example, mathematics with knowledge, English with English Example: Mathematics (teacher's Day is coming, I wish you happy 365 days a year, 8760 hours, 5256000 minutes, 3153600 seconds) with numbers!
- 3. Use a balance, two beakers, (no measuring cylinder) to measure the density of small stones The teacher talked about it before, but I forgot. It's not filling one beaker with water, then putting stones in it, and spilling water into another beaker. That's very simple. I know. What I asked is another method, not filling the beaker with water and putting stones in it
- 4. When studying pressure in physics, sometimes the solid pressure can be calculated by P = pGH (P stands for density). The teacher said that there are seven conditions. Which ones are they
- 5. The physics problem is how to use the spring dynamometer to measure the buoyancy. It seems that there is density. I'll ask the teacher this afternoon. Let's first think about the specific process Thank you The following two I asked the teacher how to use the spring dynamometer to measure the buoyancy and then measure the density of the object
- 6. Among the following four physical quantities, the one with both size and direction is () (1) mass; (2) gravity; (3) force; (4) length A. (1)(2)B. (2)(3)C. (1)(3)D. (1)(4)
- 7. It's not my problem. They just do it
- 8. If the gravity of the eraser is known to be 1.5n, the attraction between the eraser and the blackboard is constant 4N. When a thrust of 0.5N is applied to the eraser, the eraser can slide along the blackboard surface at a constant speed. If the eraser is to slide along the blackboard surface at a constant speed, a vertical upward force should be applied. The force is 0.5N___ ___ N.
- 9. The Chinese teacher went to the blackboard to wipe the blackboard, but he couldn't find it. The teacher asked: who knows where the eraser is? No one answered In the second Chinese class in the morning, the blackboard was full. The Chinese teacher went to the blackboard to wipe the blackboard, but he couldn't find it. The teacher asked: who knows where the eraser is? No one answered "Have the students on duty cleaned the blackboard after the first class?" "Yes, it's on the slot of the blackboard after cleaning," the student on duty replied "So who moved again?" the teacher asked No one answered. Some of the students were laughing, some of them were elated, and their eyes glanced at the top of the blackboard from time to time. Suddenly, the teacher understood everything. Someone was playing a prank and hid the blackboard eraser \If you are the teacher, how will you deal with this incident?
- 10. According to the uncertainty transfer formula of indirect measurement, which physical quantity has the greatest influence on the acceleration of gravity is analyzed Simple pendulum method. Need to give reasons
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- 12. Poems about reluctant to part with friends "Hand in hand, we walked silently on the way to the railway station, speechless to each other. Dear friends who have been together for three years, how can we be willing to be separated in an instant."!
- 13. Write a poem about praising the teacher To write their own, can not be found on the Internet (to find not to give points) fast bonus, tonight
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- 15. On the physical formula of volume 1. F floating = ρ liquid GV discharge 2. ρ = m / V I don't know whether V in 1,2 is v solid or V object. I want to make it clear The first formula, if a hollow ball is immersed in water, is row V the volume of hollow or solid, or the volume of hollow plus solid
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- 18. Junior high school physics work and mechanical energy formula summary, to formula with unit and unit conversion To formula with the unit and unit conversion, in junior high school textbook ninth grade Chapter 15. Trouble
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- 20. The derivation process of centripetal acceleration in high school physics An answer on the Internet Hello, first of all, draw a circle with radius R (uniform circular motion) Then take a random point and make its tangent, assuming that the right side of the pointing line is velocity v1; Find another point on the right side of the point. If the two points are very close to each other, make the tangent. Similarly, the right side of the tangent is the velocity v2, The two V's are equal in size and different in direction; Then connect the two points to the center of the circle respectively, and you will find that the distance between the two points on the arc is R * center angle (φ); Then, according to the moveability of the vector, it is translated to two velocities at the same starting point, and v2-v1 (i.e. △ V) is made; When the center angle (φ) is extremely small, the chord = arc can be obtained; Then the value of △ V is equal to V1 * center angle (φ); Time (T) = [R * center angle (φ)] / V1; The combination of two formulas Then a = (V * V) / R is obtained; There is also a step in this derivation process, which means that the value of △ V is equal to V1 * center angle (φ) I'm a little puzzled: why? Speed * center angle = speed? Please explain in detail, thank you!