Đốt cháy bột nhôm trong không khí, nhôm cháy sáng và bắn ra các hạt nhôm oxit. Biết rằng sản phẩm tạo thành là do nhôm tác dụng với oxi trong không khí.

What is a metal replacement reaction

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied