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Some species use echolocation to determine the position and velocity of objects and prey. Suppose a bat at rest sends out ultrasonic sound waves at 50.0 kHz and receives them returned from a insect moving directly away from it at 25 m/s. What is the sound frequency of the echo the bat hears?
(kHz)
A hungry 650 -N bear walks out on a beam in an attempt to retrieve some "goodies" hanging at the end, what is the maximum distance the bear can walk before the wire breaks
a 200 ohms resistor and a .4 H inductor are connected in series with a voltage source having amplitude of 30 v, what is the current amplitude
A 30 g steel ball bounces elastically on a steel plate, always returning to the same maximum height h = 14.2 m. With what speed does the ball leave the plate
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
If 3.15×10-4 J of work are required to move 17.7? C of charge from one point to another, what is the electric potential difference between the two points
A cylinder contains a mixture of helium and argon gas in equilibrium at a temperature of 247 ? C. Boltzmann's constant is 1.38066 × 10 ?23 J/K, What is the rms speed of argon
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneous breaks into two alpha particles, what is the force between the two alpha particles when they are 7.00 x 10^-15 m apart
An x-ray tube is operated at 40600 V. find the minimum wavelength of the radiation emitted by this tube
A long, current-carrying solenoid with an air core has 1780 turns per meter of length and a radius of 0.0130 m. What is the mutual inductance of this system
A series RLC circuit has R= 50, L= 2.7 H, and C= 52 nF. It is connected to an AC voltage source with an rms amplitude of 12 V, find the average power dissipated by the circuit
calculate the final temperature of the puddle once it settled to equilibrium. (Assume the chamber walls are sufficiently flexible to allow the system to remain isobaric and consider thermal losses/gains from the chamber walls as negligible.)
questionat a construction site a 65.0 bucket of concrete hangs from a light but strong cable that passes over a light
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