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An experiment requires a researcher to plate 150 μL of a diluted bacterial culture. If they need to produce 80 colonies on the plate, what should the concentration of their diluted culture be, expressed in CFU/mL? 80 colonies must be produced. What should be the concentration of the diluted culture? (CFU/mL)
An electron in a television picture tube travels at 3 x107 m/s and is acted on both by gravity and by theearth's magnetic field. Which exerts the greater force on the electron
If the coefficient of friction between the block and the floor is 0.40, what is the mass of the block.
Coherent light of frequency 6.40×1014Hz passes through two thin slits and falls on a screen 89.0cmaway. How far apart are the two slits
A 4lb block and a 13lb block, connected by a string slide down a 30 degree inclined plane. The coefficient of kinetic friction between the first block mentioned is 0.10; between the second block and the plane it is 0.20. Find the tension(in pounds) i..
A spring has of constant k=1200 N/m is compressed by 8.0cm. A 2.5kg block is placed against the compressed spring. find the resulting kinetic energy and speed of the block
You need to produce a solenoid that has an inductance of 2.55 ?H . You construct the solenoid by uniformly winding 1.07 m of thin wire around a tube. How long, in centimeters, should the tube be
In a simple series circuit a battery is connected through an ammeter to an electriclamp. A voltmeter is connected parallel to the lamp. The ammeterreads 0.75 A and the voltmeter 50 V. What is the resistance of the lamp neglecting the current drawn..
pool players often pride themselves on their ability to impart a large speed on a pool ball. in the sport of billiards
An astronomer on Earth observes a meteoroid in the southern sky approaching Earth at a speed of 0.830c. At the time of its discovery, the meteoroid is 23.0 light-years from Earth. Compute the following. The time required for the meteoroid to reach Ea..
How does these values compare to the measured field values at 20, 60 and 90 minutes - Calculate the total infiltrated depth, F(t) at 20, 60 and 90 minutes using the parameters you have obtained using Horton's equation for cumulative infiltration (F..
A basketball player wants to know how fast the ball must be traveling when it leaves his hands to make it into the basket. What is the minimum velocity with which the ball must be thrown
A block of ice at 0°C is added to a 150 g aluminum calorimeter cup which holds 210 g of water at 12°C. If all however 2.0 g of ice melt, what was the original mass of the block of ice?
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