Physics, 04.02.2020 14:43 heberavilesramirez52
Amachine is rolling a metal cylinder under pressure. the radius of the cylinder is decreasing at a constant rate of 0.05 inches per second and the volume, v, is 128pi cubic inches. at what rate is the length, h, changing when the radius, r, is 1.5 inches? note: v=pi(r^2)h
hi, as above this is the problem i am doing. there is no answer given to check so i was wondering about a couple of things:
is volume assumed to be a constant in this problem?
is the height change decreasing (negative rate) or increasing (positive rate) in the final answer?
i worked out dh/dt to be 512/135 in./s
Answers: 1
Physics, 22.06.2019 14:30
Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?
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Physics, 22.06.2019 22:50
Cyclotrons are widely used in nuclear medicine for producing short-lived radioactive isotopes. these cyclotrons typically accelerate h- (the hydride ion, which has one proton and two electrons) to an energy of 5 mev to 20 mev. this ion has a mass very close to that of a proton because the electron mass is negligible—about 1 2000 of the proton’s mass. a typical magnetic field in such cyclotrons is 1.9 t. (a) what is the speed of a 5.0-mev h-? (b) if the h- has energy 5.0 mev and b = 1.9 t, what is the radius of this ion’s circular orbit?
Answers: 1
Amachine is rolling a metal cylinder under pressure. the radius of the cylinder is decreasing at a c...
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