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Consider two fragments of DNA of radius r1 = 31 nm and r2 = 38 nm when they are coiled up as they move through a gel. An electrophoresis analysis (see figure below) is carried out to separate these two fragments. Suppose the drag factor C in the equation Fdrag = -Crv is C = 5.0 10-5 kg/(m · s), and assume each fragment has a charge q = -14e.
(a) If the electric field has a magnitude of 1.5 N/C, what is the speed of each fragment in the gel?
(b) How long will it take the smaller fragment to move a distance 1 cm (a typical distance used in DNA fingerprinting)?
A solid sphere of radius 40.0 cm has a total positive charge of 20.4 µC uniformly distributed throughout its volume. Calculate the magnitude of the electric field
in the absence of a nearby metal object the two inductances la and lb in a heterodyne metal detector are the same and
two particles are launched from the origin of the coordinate system at time t 0. particle 1 of mass m1 5.00 g is shot
Two planes approach each other head-on. Each has a speed of 705 km/h, How much time do the pilots have to take evasive action
A 115.29 g ice cube at -11°C is placed in an aluminum cup whose initial temperature is 79°C. What is the mass of the cup
two spheres are mounted on identical horizontal springs and rest on a frictionless table as in the drawing. when the
An ideal gas in a container is at a temperature of 79.1°C. Evaluate the average translational kinetic energy of a gas molecule in the container
Would you expect to get a more accurate value for m using Equation m = h'/h in the situation where the lens is closest to the object or in the situation where the lens is furthest from the object?
Parallel plates are 5 mm apart and 2 m2 in area (you can roll the plates into a cylindrical geometry to make them more compact). A potential difference of 10 kV is applied across the capacitor. Find the capacitance of this parallel-plate capacitor
Discussion Item Compare and contrast the best jet range profiles. Which is best and why? Constant Mach, Constant Cruising Altitude. Constant Thrust, Constant Cruising Altitude. Decreasing Mach, Constant Cruising Altitude. Constant Mach, Increasing Al..
A student is about to do a push-up. Her center of gravity lies directly above P on the floor, which is 0.9 m from her feet and 0.5 m from her hands. what is the force exerted by the floor on her hands
A 45-m length of wire is stretched horizontally between two vertical posts. Find the magnitude of the earth's magnetic field at the location of the wire
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