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A loudspeaker is generating sound in a room. At a certain point, the sound waves coming directly from the speaker (without reflecting from the walls) create an intensity level of 74.1 dB. The waves reflected from the walls create, by themselves, an intensity level of 67.5 dB at the same point. What is the total intensity level?
An object weighing 307 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 270 N. Immersed in oil, the object weighs 282 N. compute the density of the object.
A specimen of oil having an initial volume of 600 cm3 is subjected to a pressure increase of 3.6*10^6 Pa, what is the bulk modulus (in Pa) of the material
A meteorite that has a mass equal to 30.8 tonne (1 tonne = 1000 kg) is exhibited in the American Museum of Natural History in New York City, Find the magnitude of the impulse experienced by the meteorite up to the time its kinetic energy was halved
The middle C string on a piano is under a tension of 644 N. Find the linear density of the string
a vector A has a magnitude of 40.0 m and points in a direction 20.0 degrees below the positive x axis. find the magnitude and direction of the vector C
A machine that makes transformers can only wind the coils with a single specific number density. what is length of the output coil
a ball is pushed with an initial velocity of 6 m/s. the ball rolls down a hill with a constant acceleration of 2 m/s^2. what is the balls velocity at the bottom of the hill
A force of 100 N is applied to a 50kg mass in the direction of motion for a distance of 6.0m, how much work is done by the varying force
A heat pump has a coefficient of performance of 3.70 and operates with a power consumption of 7.15 103 W. How much energy does it extract from the outside air
A lightbulb has a resistance of 13? and consumes 9.4W of power; the rod is 1.33m long and moves to the left with a constant speed. what is the speed of the rod
A high-energy pulsed laser emits a 1.2-ns-longpulse of average power 1.7×1011W. Determine the rms value of the electric field
A patient swallows a radiopharmaceutical tagged with phosphorus-32 (3215P), a ? - emitter with a half-life of 14.3 days. What is the total energy deposited in the body during the 5.5 days
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