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A) Two sound waves have intensities of 0.100Wm^2 and 5.00W/^2. What is the difference in their intensity levels?
B) The observed frequency of a train whistle is 475Hz as it approaches a stationary observer and is 410Hz as it recedes. Find:
the speed of the train.
the frequency heard by a passenger on the train.
The lower weight is a light bag filled with sand. Assume a pin pokes a hole in the bag and the sand slowly leaks out while the puck is revolving. What would be the puck's speed after all of the sand is gone.
consider two ZAMS stars: 09 and B0. The effective temperature of the 09 star is 34,500 k. Assuming a hydrogen density of 10^8 m^-3, and Alpha = 3.1 x 10^-19 m^3 s^-1, estimate the Stromgren radius of the stars in pc and AU
If i have a hollow copper sphere that has an outer diameter of 20.00 cm that is floating so that everything is just submerged in a bucket of water
Struck from behind, a 950-kg stopped car accelerates from rest to 40km/h in 75 ms, What horizontal force on the head would accelerate it along with the rest of the body
A series RLC circuit consists of a 96.0 ? resistor, a 7.00 mHinductor, and a 1.40 nF capacitor. What is the power supplied to the circuit if ? =1/2?0
Find the gravitational attraction between two solid lead spheres of 1 kg mass each if the spheres are almost in contact
A toy train is pushed forward and released at = 2.0 with a speed of 1.5 . It rolls at a steady speed for 2.8 , then one wheel begins to stick. The train comes to a stop 5.6 from the point at which it was released. Elucidate the train's accelera..
A potter's wheel having a radius 0.450m and a moment of inertia 15 kg•m2 is rotating freely at 45 rev/min. The potter can stop the wheel in 7.50 s by pressing a wet rag against the rim and exerting a radically inward force of 68 N.
A 4.5 kg fish swimming 2 m/s swallows an absent minded 1 kg fish swimming toward it at a velocity that brings both fish to a halt at once after lunch. What is the velocity v of the smaller fish before lunch.
Find the slit seperation of a double slit system that will produce bright interference fringes 1.00 degrees apart
You are working on the analysis of rocks brought back from the Moon, What is the density of the rock
When a diver jumps into a lake, water leaks into the gap region between the diver's skin and her wetsuit, Estimate how much energy (in units of candy bars = 300 kcal) is required by this heating process
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