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Question from: Nanotechnology: Understanding Small Systems
The random motion of molecules within a cell is driven by energy from heat.
a. At what temperature do most cells prefer to live?
b. The calorie is a unit of energy defined as the amount of energy needed to raise 1 g of water by 1°C. A bacterium (which is mostly water) weighs about 1 pg.
Roughly, how many grams of sugar does a cell have to use to warm back up to its preferred temperature if it is suddenly placed in a cooler environment that lowers the cell's internal temperature by 5°C?
c. If the sugar used for energy is glucose (molecular mass = 180.16 g/mol), how many molecules are used?
d. How much mass would be used as fuel to warm the cell if, instead of sugar, fatty acids served as the energy source?
A .165 kilogram baseball is thrown to frank at 24.5 m/s. The ball is hit by Joe with the equal velocity and path. calculate the average force the bat exerted on the ball
Determine the fugacity of pure liquid acetone at 100 bar and 382 K. The molar volume of the liquid is 73.4 cm3/mol. You may assume vi does not change with pressure. Calculate the fugacity of pure liquid propane at 333 K and 22 bar.
What total impulse was imparted by these forces. Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 12.0 cm-3, and their speed is 702 km/s. Find the current density of these protons.
What is his efficiency for the12.0 h climb?
An object-spring system oscillates with an amplitude of 3.4 cm. If the spring constant is 210 N/m and object has a mass of 0.50 kg, obtain the maximum acceleration of the object
A positive charge of 4.90mC is fixed in place. From a distance of3.40 cm a particle of mass 5.60 g and charge +3.10 mC is fired with an initial speed of 74.0 m/sdirectly toward the fixed charge.
Two arrows are shot vertically upward. The second arrow is shot after the first one, but while the first is still on its way up. Compute the initial speed of the second arrow
For a research project, a student needs a solenoid thatproduces an interior magnetic field of 0.0300 T. Determine the number of layers of wire needed and the total length of the wire
A diver 48 m deep in 18°C fresh water exhales a 0.6 cm diameter bubble. What is the bubble's diameter just as it reaches the surface of the lake
A bicyclist on a horizontal plane starts from rest and begins to pedal. The wheel of radius r = 0.345m has a constant angular acceleration of ? = 9.35rad/s2, What is the linear acceleration of the bicycle
A moving particle encounters an external electric field that decerases its kinetic enegery from 9420 eV to 8580 eV as the particle moves from position A to position B. Determine the charge of the particle
The tires of a van make 51 revolutions as the van reduces its speed uniformly from 95 km/h to 38 km/h. Find what was the angular acceleration of tires
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