A train is approaching a highway crossing at a speed of 40
A train is approaching a highway crossing at a speed of 40 m/s. A driver stopped at the crossing hears the train's whistle at a frequency of 1000 Hz. What frequency would the driver hear if the train stopped? The speed of sound in air is 343 m/s.
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a circuit consists of two 495-k resistors in series with an ideal 120-v batterya calculate the potential drop across
you have a solution of a buffer with 10 mmoles of the buffer initially the solution has a ph of 68 you add 100 mm koh
if an object is projected upward with a velocity of 73 ms at an angle of 25 degrees what isa its horizontal velocity
an unknown concentration of tap water is transferred to a 100 ml volumetric flask and diluted with di water to 100ml
a train is approaching a highway crossing at a speed of 40 ms a driver stopped at the crossing hears the trains whistle
a massless spring with spring constant k is vertically mounted so that the bottom end is firmly attached to the ground
design a response cost procedure for a 13 year old boy with a history of lying explain what makes response cost a
draw lewis structures for the following molecules and label each with the appropriate geometry co nh3 hno3 h2o2 o3 c2h2
although these quantities vary from one type of cell to another a cell can be 18 micrometers in diameter with a cell
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