별개 화학: 수명과 충전 증거를 기준으로 전지를 선택하십시오.
도입됨| English | 의미 |
|---|---|
| rechargeable cell/rɪˈtʃɑːdʒəbl sel/ | 충전식 전지 |
| non-rechargeable cell/nɒn rɪˈtʃɑːdʒəbl sel/ | 일회용 전지 |
What would explain this observation?
- A torch cell eventually stops supplying electricity because the chemical reactants are used up. A rechargeable cell 可充电电池 is designed so an external current can reverse the reaction.
- Start with a prediction. State the quantities or features you would compare, then decide what evidence could distinguish two explanations.
Build the model
- Non-rechargeable cells 一次电池 stop producing electricity when one of the reactants has been used up. Alkaline cells are non-rechargeable examples in this specification. Rechargeable cells and batteries can be recharged because an external electrical current reverses the chemical reaction. Charging transfers energy into the device; it does not create unlimited energy or permanently restore every cell to its original condition.
- non-rechargeable cell: A cell whose intended use ends when its reactants are used up; rechargeable cell: A cell designed for its reaction to be reversed by an external current.
적절한 충전식 전지가 다시 사용될 수 있는 이유는 무엇입니까?
난이도 1/5 · 100 코인 + 오늘 첫 완료 시 소액 보너스
충전은 외부 전류로 전지 반응을 역회전시켜 반응물을 재생합니다. 어떤 전지도 무중에서 에너지를 만들 수 없으며, 일반 알칼리 전지는 역회전을 위한 설계가 아니며 안전하게 재충전할 수 없습니다.
각 전문 용어에 대한 정확한 의미를 매칭하시오.
난이도 2/5 · 140 코인 + 오늘 첫 완료 시 소액 보너스
정의를 사용하여 유사한 양과 과정을 구분하시오.
Choose evidence that can test it
- Choose a cell for its intended use. Compare required voltage, available operating time, mass, initial cost, replacement frequency, charging access and disposal information supplied. Repeated use can make a rechargeable option cheaper over time despite greater initial cost. A rarely used emergency device might place more weight on storage performance and immediate availability. These conclusions depend on stated data, not a universal rule that one cell type is always best.
- Read the manufacturer’s stated type and use only the approved charger and school procedure for an actual recharge demonstration. Do not charge alkaline cells or construct an improvised charger. A written comparison can use fictional costs safely: state whether electricity, charger purchase and end-of-life disposal are included. Keep environmental and financial criteria distinct so a low purchase price is not automatically called lower waste.
이 경우 조사 또는 모델이 더 타당하게 만들 수 있는 두 가지 습관은 무엇인가?
난이도 2/5 · 140 코인 + 오늘 첫 완료 시 소액 보너스
조건과 가정을 명시하면 다른 사람이 정확히 작업을 재현할 수 있으며, 근거 증거를 기록하면 결론을 검증할 수 있습니다. 반대되는 결과를 숨기는 것은 잘못된 결론을 반박할 수 있는 증거를 제거하는 것이며, 한 번의 측정으로는 더 넓은 주장을 입증할 수 없습니다.
Work from known quantities
- State the known values and their units. Choose the relation because its assumptions fit this case, then rearrange before substitution.
- Known: a supplied non-rechargeable option costs £2 per complete use. A rechargeable option costs £12 initially and £0.10 per use to charge, including the stated charger. At ten uses costs are £20 versus £12+10×£0.10=£13, a £7 saving for the rechargeable option. At one use its £12.10 cost exceeds £2. This comparison assumes both meet the same performance need and remain usable.
A fictional rechargeable option costs £15 plus £0.20 per use. Find total cost at 20 uses. Use the same sequence: known quantities → model → relation → substitution → unit and interpretation.
가상의 충전식 옵션은 £15 + 사용 시 £0.20가 듭니다. 20회 사용 시 총 비용을 구하십시오.
난이도 2/5 · 140 코인 + 오늘 첫 완료 시 소액 보너스
결과는 19 £입니다.已知: £15 초기 비용 plus £0.20 사용당 비용; 20 회 사용. 총비용 = 15 + 20 x 0.20 = 15 + 4 = £19. 가치 판단을 위해 동일한 사용 횟수의 비충전형total cost와 비교하십시오.
Check the conclusion and its limits
- Do not call recharging the replacement of consumed chemicals with no energy input. Non-rechargeable does not mean unable to produce electricity repeatedly before exhaustion. A rechargeable lifetime is finite; a cost projection beyond supplied cycle life is unsupported. This is both-tier separate Chemistry, without advanced electrode mechanisms.
- Return to the original observation. Explain what the result supports, which conditions it assumes, and one way to test a competing explanation.
A rechargeable cell supplies energy indefinitely without energy input. This claim is false: Recharging INPUTS electrical energy to reverse the chemistry - the energy comes from the supply, not from nowhere. Every cycle also degrades the cell a little, so its life is finite.
Separate Chemistry: choose cells using lifespan and charging evidence: Choose a cell for its intended use. Compare required voltage, available operating time, mass, initial cost, replacement frequency, charging access and disposal information supplied. Repeated use can make a rechargeable option cheaper over time despite greater initial cost. A rarely used emergency device might place more weight on storage performance and immediate availability. These conclusions depend on stated data, not a universal rule that one cell type is always best.
충전식 전지는 에너지 공급 없이도 무한히 에너지를 공급합니다.
난이도 1/5 · 100 코인 + 오늘 첫 완료 시 소액 보너스
충전은 화학 반응을 역회전시키기 위해 전기 에너지를 입력(INPUTS)합니다. 에너지는 어딘가에서 나온 것이 아니라 공급源에서 나옵니다. 매 사이클마다 전지가 약간-thinking degradation되므로 수명은 유한합니다.
반응물이 소진되면 의도한 사용이 종료되는 전지: 기술 용어를 적으십시오.
난이도 1/5 · 100 코인 + 오늘 첫 완료 시 소액 보너스
비충전식 전지란 반응물이 소진되면 의도한 사용이 종료되는 전지를 말합니다.