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The 20-g centrifuge at NASA's Ames Research Center in Mountain View, California, is a horizontal, cylindrical tube 58 ft long. Suppose an astronaut in training sits in a seat at one end, facing the axis of rotation 29.0 ft away. Decide the rotation rate, in revolutions per second, needed to give the astronaut a centripetal acceleration of 20.0g.
A diver 32.0 m deep in 8.00 °C fresh water exhales a 1 cm diameter bubble. What is the bubble's diameter just as it reaches the surface of the lake, where water temperature is 25°C? Hint: suppose the air bubble is always in thermal equilibrium wit..
why does a tile or wooden floor feel colder ahtn a carpeted floor when both are at the same temp? (assume both below room temp) which would feel hotter if they were at the same temperature above room temperature? why?
Two litres of mixture in which there is 2/5 of water and the rest spirit is mixed with five litres of mixture in which there is 1/3 of water and the rest spirit. What is the ratio of water and spirit in the new mixture?
Luigi wishes to suspend a lantern of mass m between his store and a telephone pole. THe cable attached to his store makes an angle (theta) to the wall. The cable to the telephone pole is horizontal.
A 52 kilogram circus artist is to slide down a rope that will snap if the tension exceeds 470 Newton. Explain what happens if the artist hangs stationary on the rope
The one-dimensional parity operator pi is defined by pi psi (x) = psi (-x) In other words, pi changes x into –x everywhere in the function. Is pi a Hermitian operator?
The force stretching the D string on a certain guitar is 156 N. What is the speed of the waves on the string
you are driving north on 107th avenue at a speed of 29.2 mph. a police car whose siren produces a sound at a frequency
A charge of -2.85 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass, which has a radius of 0.105 m.
A compound microscope has an objective lens with a 2.2 cm focal length and an eyepiece with a 5.4 cm focal length. what magnification does the microscope produce
You (height of your eyes above the water, 1.75 \rm m ) are standing 2.00 \rm m from the edge of a 2.50-\rm m-deep swimming pool. How far from the side of the pool is your cell phone
A radio signal with a wavelength of 1.2 x10-4 m is sent to a distance asteroid, How far from Earth is the asteroid
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