Physics, 10.03.2020 14:03 kaylee0424
A car travelling at 20m/s blows its horn which has a frequency of 600Hz. A stationary observer notices that the frequency of the horn changes considerably as the car passes by him. Calculate the change in frequency heard by the observer as the car approaches and moves away from the observer.(Given velocity of sound =330m/s)
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4. a 75.0 g piece of ag metal is heated to and dropped into 50.0 g of water at the final temperature of the mixture is what is the specific heat capacity of silver? 5. a 465 g chunk of iron is removed from petrucci, ralph h.. general chemistry (p. 290). pearson education. kindle edition.
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Physics, 22.06.2019 14:00
Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.
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How many atoms of nitrogen are in the chemical formula ni(w on
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An object with initial temperature 130 ā f is submerged in large tank of water whose temperature is 50 ā f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = ā 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )
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A car travelling at 20m/s blows its horn which has a frequency of 600Hz. A stationary observer notic...
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