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a geologist is camped 8,000 m from a volcano as it erupts.
a) how much time elapses before the geologist the sound from the eruption? discuss what we are assuming about the propagation of the wave.
b) how much time does it take the seismic waves produced by the eruption to reach the geologist's camp, assuming the waves travel through granite as sound waves do? discuss why the speed of a wave changes when they go through different materials.
A thin soap film (n = 1.302) suspended in air has a uniform thickness. When white light strikes the film at normal incidence, violet light (&lambdav = 412 nm) is constructively reflected. At what angle of incidence will green light (&lambdag = 562..
A person who weighs 616 N is riding a 108-N mountain bike. find the area of contact between each tire and the ground
The impact of the head of a golf club on a golf ball can be approximately regarded as an elastic collison. what must the speed of the club be before impact
The distance from the thrower's axis of rotation to the hammer head is 1.2 m. The hammer has a mass of 7 kg. What is the linear (tangential) velocity of the hammer head
A current with sinusoidal time-dependence, whose peak value is 3.55 A and frequency is 775 cycles per second, Calculate the average power dissipated by the loop
where the woman falls down from a great height, and comes to a full stop. For which case is the change in the woman's momentum the largest? For which case is the Impulse the largest?
A lens in Lick Observatory's 36-inch refracting telescope has a thickness of 1.96 inches at its center and an index of refraction n=1.52. What is the light speed in the lens
Two 100kg lead spheres are suspended from 160m -long massless cables. The tops of the cables have been carefully anchored exactly 1.0m apart
Two carts with masses of 5.00 kg and 2.64 kg move toward each other on a frictionless track with speeds of 4.86 m/s and 3.46 m/s correspondingly. The carts stick together after colliding head-on. Find the final speed.
A projectile is launched at an angle of 60.3 degrees with the horizontal (x axis) at some unknown velocity. What is the object's vertical displacement at this time in meters
A bartender slides a beer mug at 1.8 m/s towards a customer at the end of a frictionless bar that is 1.4 m tall. What are the speed and direction of the mug at impact
A converging lens of focal length 8.490 cm is 19.8 cm to the left of a diverging lens of focal length -5.83 cm. Find the magnification of the coin's final image
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