Pollen grains are very light. In one experiment to determine their mass, researchers dropped grains inside a clear glass cylinder and then watched their motion with a microscope. A 40-μm-diameter pollen grain was observed to fall at a rate of 5.3 cm/s. What is the mass in nanograms of this grain?

Q: Kinesin is a motor protein that moves cargo within cells in a series of rapid 8-nm -long steps. Each…

A:

Q: Although these quantities vary from one type of cell to another, a cell can be 1.9 um in diameter…

A: The outer radius of the cell wall is The thickness of the cell wall is The density of the pure water…

Q: Some physical quantity X has the following units: M-9 L-5 T7. Some physical quantity Y has the…

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A: Given data as per question Accepted value =9.80 m/s2

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Q: two gallons of water come out of a 3/4" diameter faucet every minute, what is the speed of the…

A: Given that: Two gallons of water come out of the diameter of the 34faucet every minute.     It is…

Q: You measure the mass of a ball to be M = 8.5 kg and its diameter to be d = 1.46 m.  Determine the…

A:

Q: The average value of the squared speed does not equal the square of the average speed. To verify…

A: Here, v1=2.20 m/sv2=4.32 m/sv3=8.09 m/s

Q: a) The instantaneous rate [kg/s] of producing a particular compound during a chemical reaction is…

A: We have table given with coordinates (t,rate)=(0,0), (2,0.145), (4,0.354), (6,0.61), (8,0.95),…

Q: Grains of fine California beach sand are approximately spheres with an average radius of 50 pm and…

A: The problem is asking to find the mass of sand grains that would have a total surface area equal to…

Q: 1.6) Consider the duct system shown in figure Q1.6. Air flows through two 200 mm x 400 mm ducts that…

A: To solve this problem, we can use the principle of continuity, which states that the volume flow…

Q: 45 gg of gasoline are mixed with 60 gg of water. What is the average density of the mixture? Express…

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Q: The mass of a newborn baby’s brain has been found to increase by about 1.6 mg per minute. (a) How…

A: Rate of increase of mass of a newborn baby's brain,…

Q: The gasoline gauge on a van initially read (1)/(8) full. When 15 gallons were added to the tank, the…

A: Let total capacity of the tank is x gallon.Initially the amount of gasoline in the tank = x/8…

Q: What is the ratio of the volume of 10 kg of gold to the volume of 10 kg of oak

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Q: A study finds that the metabolic rate of mammals is proportional to m314, where m is the total body…

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Q: One mole of Gold (Au) atom has a mass of 197 g. We know that the density of gold is 19.30 g/cm3 in…

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Q: As an architect, you are designing a new house. A window has a height between 130 cm and 140 cm and…

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Q: A hedge has been trimmed to look like a cone. The circumference of the base of the hedge is 2m. The…

A: Given that the circumference of the base of the hedge is 2m, then the radius is

Q: A study finds that the metabolic rate of mammals is proportional to m3/4, where m is the total body…

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Q: the shell is thin, but has a definite thickness.  Calculate the (volume) density of the shell, in…

A: Radius of shell= 28 cm thickness= 0.3 mm =0.03 cm

Q: During the summer, the height of the water in a pool decreases by 4.25 inches each week due to…

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Q: cubic box contains 385 grams of water. What is the length of one side of the box in meters?

A:

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.