need help!! In the first law of thermodynamics, ΔE=Q−W , what does Q stand for? the work done by the piston the heat added to the system the change in the internal energy of the system the internal energy of the system

Ared apple is illuminated by a blue light the apple will appear

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

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n