half life, for my physics but pretty sure it involves maths. you don’t have to do them all i’m just confused how to work it out.

Note: the following questions are unrelated to the balmer series or the martian. refer to your course notes. a sun-sized star will spend most of its lifetime as a: white dwarf b. red giant c. protostar d. main-sequence star

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?