Find the probability of getting two pairs
In a poker game, five cards are dealt at random from an ordinary deck of 52 playing cards. Find the probability of getting two pairs.
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A piece of wire with mass per unit length 68 {\rm g/m} runs horizontally at right angles to a horizontal magnetic field. A 6.4 {\rm A} current in the wire results in its being suspended against gravity.
Two lead strips (anode and cathode) connected to a small battery are placed in a beaker of lead(II)nitrate solution. A thinlayer of substance is formed on the outside of the cathode.
At what angle will the second intensity maximum occur if the incident radiation has a wavelength of 505. nm?
Calculate: (a) The amount of heat the pump captures from the ambient air over that period of time in kJ; (b) The coefficient of performance of the heat pump.
In a poker game, five cards are dealt at random from an ordinary deck of 52 playing cards. Find the probability of getting four of a kind.
Find the maximum torque exerted on the coil when the wire is used to make (a) a single-turn square coil and (b) a two-turn square coil.
Derive the expression in σ2(b0)=σ2(1/n+x-bar2/Σ(Xi-X-bar)2) for the variance of b0, making use of σ(Y-bar,b1)=0. Also explain how variance σ2(b0)=σ2(1/n+x-bar2/Σ(Xi-X-bar)2) is a special case of variance &sig
What two alcohols would you use if your goal was to synthesize hexyl pentyl ether via acid-catalyzed dehydration of two alcohols?
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