Physics, 22.05.2020 03:10, picklehead7272
Qué tipo de sistema es una caja de leche chocolatada sin abrir? Ana considera que es un sistema aislado y en cambio Martina opina que es un sistema cerrado. ¿Cuál de las dos tiene razón y por qué? ¿Y después de tomarla?
Answers: 2
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Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.
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Physics, 22.06.2019 18:50, jtsizemore
An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?
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Qué tipo de sistema es una caja de leche chocolatada sin abrir? Ana considera que es un sistema aisl...
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