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A toy model for DNA molecules. A DNA molecule is made of two complementary strands, which are hold together by hydrogen bonds.
Define the partition function Z for a system in terms of the energies E1 of its quantum states j and the inverse temperature /3 = (I T)''.
Diagram shows M at position x with spring force -kx acting to accelerate the mass toward the origin.
A balloon is descending with a constant acceleration "a" less than 'g' weight of the balloon with the basket and the contents is W.
On the 'x vs t' set of axes show qualitatively, the x(t) graph of each spacecraft. Include x and t coordinates of intersections and intercepts.
Show that the entrophy can be written as
He pulls down on a rope as shown, to raise himself and the cage. The man and cage have a total weight of 639 nt. Ignore friction as negligible.
A crate rests on a truck which is traveling at speed V= 26 m/sec down a hill inclined at angle b= 8 degrees.
A radar station detects an airplane approaching directly from the east. At first observation, the range to the plane is 360 m at 40 degrees.
An ideal gas with Cp/Cv=1.5 where Cp and Cv are respectively the heat capacities at constant pressure and constant volume, is used as the working substance
A system whose equation of state depends only on pressure P, volume V and temperature T is taken quasi-statically from state from state A to state B
The horizontal and vertical components of the acceleration of the block. (Do these answers reduce to the correct results when M is very large.
The same force applied to a second object of mass m2 produces an acceleration of 1.00m/s^2.
What is the average acceleration of the ball while it is in contact with the wall? Define the initial direction of the ball's motion to be positive.
A car accelerates from rest and travels for 4.98 s with a uniform acceleration of +1.50 m/s^2. The driver then applies the brakes.
Just as an empty box car passes him, the fugitive starts from rest and accelerates at 3.84 m/s^2 to his maximum speed of 8.23 m/s.
If the plane is traveling horizontally with a speed of 223 km/hr (61.9 m/s), how far in advance of the recipients (horizontal distance) must the goods be droppe
If the speed of the stream as it leaves the hose is 40.1 m/s, at what height will the stream of water strike the building?
The coefficient of kinetic friction is 0.271. If the system is set in motion with m2 moving downward, what will be the acceleration of the system?
At what minimum speed must a roller coaster be traveling when upside down at the top of a circle if the passengers are not to fall out?
"A runner hopes to complete the 10,000-m run in less than 30.0 minutes. After exactly 27.0 minutes, there are still 1100 m to go."
Its speed is 16 meters per second. What is the magnitude and direction of the total force exerted on the car by the track?
The molar energy of a mono atomic gas which obeys van der waals equation is given by:
An airplane has a mass of 3.1 x 10^4 kg and takes off under the influence of a constant net force of 3.7 x 10^4 N.
The coefficient of the static friction between the cup and the table is 0.30. Suddenly, the plane accelerates, its altitude remaining constant.