Problem based on terminal speed
A falling sky diver reaches terminal speed with her parachute closed. After the parachute is opened, what parameters change to decrease this terminal speed?
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Question: A 3.0 g bullet of specific heat 128 J/kg.degree C is moving at 180 m/s and enters a bag of sand then stops. If all kinetic energy is converted into heat, by what amount is increase in temperature of bullet?
You have a pure sample of 2-pentanol but discover that it does not rotate plane polarized light. The measurement of optical activity is done correctly. What is the most likely explanation?
Assuming the temperature is constant, predict whether the change in entropy (delta S) is positive, negative or zero during the followings reactions.
What mass of NaOH (s) must be added to 1.0 L of 0.050 M NH3 to ensure that the percent ionization of NH3 is no greater than 0.0010%? Assume no volume change on addition of NaOH.
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A student needs to react 0.228 mol Zn with hydrochloric acid. Calculate the minimum number of moles of HCl required, assuming all the zinc reacts?
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Question: A lightning bolt may carry a current of 1.00 x 104 A for a short period of time. What is the resulting magnetic field 100 m from the bolt? Suppose that the bolt extends far above and below the point of observation.
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