Why are chloroplasts found in plant cells but NOT in animal cells?

Research the neutrino using the internet and report your findings. in a nuclear decay, the nucleus of an atom splits apart. larger particles can be detected and their masses and velocities can be recorded. explain how the existence and properties of the neutrino could be predicted using the conservation laws.

In a good thermo flask the main cause of heat loss is

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?