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Two pianos each sound the same note simultaneously, but they are both out of tune. On a day when the speed of sound is 343 m/s, piano A produces a wavelength of 0.768 m, while piano B produces a wavelength of 0.773 m. How much time separates successive beats?
an automobile having a mass of 1000 kg is driven into a brick wall in a safety test. the bumper behaves like a spring
The eyepiece of a microscope has a focal length of 1.25 cm and the objective lens focal length is 1.62 cm. what is the angular magnification of the microscope
in a needle biopsy, a narrow strip tissue is extracted from a patient using a hollow needle. rather than being pushed by hand, to ensure a clean cut the needle can be fired into the patient's body by a spring. calculate the maximum speed of the nee..
A sprinter accelerates from rest to a top speed with an acceleration whose magnitude is 3.53 m/s2. how far does he run during the acceleration phase
According to a report on traumatic brain injury, the force that a professional boxer's fist exerts on his opponent's head is equivalent to being hit with a 5.9 kg bowling ball traveling at 8.9 m/s that stops in 0.018s
A typical fighter pilot can withstand a sustained force equal to seven times his weight before losing consciousness. What is the smallest radius turn that he can make
The magnitude of the force of friction acting on the block between A and is 1.2N and points A and B are 0.5 m apart. If the kinectic energies of the block at A and B are 4J and 5.6 J, respectively, how much work is done on the block by the force p..
A 4.40 kg block is pushed along a floor by a constant applied force that is horizontal and has a magnitude of 40.0 N. it gives the block's speed v versus time t as the block moves along an x axis on the floor. The scale of its vertical axis is set by..
A damped mass-spring system oscillates at 140 Hz. The time steady of the system is 2.0 s. At t = 0, the amplitude of oscillation is 8.6 cm and the energy of the oscillating system is after that 86 J.
A person working on the transmission of a car accidentally drops a bolt into a tray of oil. The oil is 4.86 cm deep. What is the index of refraction of the oil
The rocket attains its launch speed in a negligibly short period of time, after which its engines shut down and the rocket coasts. Explain by how much does the rocket clear the top of the wall?
An archeologist has discovered an old artifact. Its carbon-14 content is found to be 41.7 % of that in a fresh sample of wood. Find the age of the sample
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