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Two batteries (V1 = 15V and V2 = 12V) are in a circuit with three identical resistors (R1 = R2 = R3 = 5.1?). What is the current in the R3 resistor? Note that all resistor values are equal , which greatly simplifies your loop equations.
question how do we calculate or determine the distances to stars? what units do we use and what are the limitations if
Betelgeuse has a radius 650 times that of the sun and a massfifteen times that of the sun. What angle doesthe sun subtend as viewed from the earth
The captain of an infamous ship spots an iceberg ahead. Currently the ship is travelling east at a speed of 37.0 knots. How many seconds will it take before the iceberg is directly ahead of the ship
A geiger-muller tube is a type of gas-filled radiation detector. It can detect particles like X-rays, alpha particles and beta rays (electrons). what is the density of the gas in this geiger tube
A sinusoidal wave has period 0.10 second and wavelength 2.0 meter. Obtain what is the wave speed
What is the total dose equivalent of 1 rem of fast neutrons, 0.5 rad of low energy betas, 25 ergs per gram of thermal neutrons, and 150 mR of diagnostic x-rays
A 3.60 kg sphere makes a perfectly inelastic collision with a second sphere that is initially at rest. What is the mass of the second sphere
A Ferris wheel, rotating initially at an angular speed of 0.50 rad/s, accelerates over a 6.0-s interval at a rate of 0.040 rad/s2. What is its angular speed after this 6-s interval
Some human nerve cells have a long, thin cylindrical cable (the axon) from their inputs to their outputs. Consider an axon of radius 5.5x10-6m length 0.64m. Determine the resistance of the fluid in this axon
A 0.5kg block is moving at a constant speed on a horizontal surface. The frictional force acting on the block is 20N, Calculate kinetic friction
The Stanford Linear Accelerator can accelerate electrons to energies of 50 GeV. What is their de Broglie wavelength? Recalling that waves can only probe structure as small as their wavelength divided by 2, what fraction of a proton’s diameter (d = 2 ..
A source emitting sound in air at frequency of 1000 Hz recedesfrom an observer with speed 1/5 speed of sound. If observer moves towards source at a speed of 1/10 speed ofsound, what frequency does he measure
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