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A certain single ion channel is selectively permeable to K and has a resistance of 1.15 G?. During an experiment, the channel is open for approximately 1.50 ms while the voltage across the channel is maintained at 85.5 mV with a patch clamp. How many K ions travel through the channel during this time?
what is the absolute magnitude of the force on each charge?
A straight horizontal wire carries a current of 6.50 μA. An electron is moving above the wire the direction parallel to it and in the same direction as the conventional current in the wire.
A person doing a chin-up weighs 655 N exclusive of the arms. During first 15 cm of the lift, each arm exerts an upward force of 355N on the torso. If the upward movement starts from rest, what is the person's velocity at this point.
A 10.60 weather rocket generates a thrust of 220. The rocket, pointing upward, is clamped to the top of the vertical spring. The bottom of the spring, whose spring constant is 450, is anchored to the ground.
The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.800, and the log has an acceleration of 0.800 m/s2. Find out the tension in the rope.
A turntable that spins at a constant 73.0 {rm rpm} takes 3.60 {rm s} to reach this angular speed after it is turned on. Find its angular acceleration (in {rm rad/s^{2}}), suppose it to be constant, and the number of degrees it turns through while ..
Let the drag force on a ball of mass m moving through air in the gravity-free bubble include both "viscous" drag F1=-kv, Find the velocity v of a ball thrown with initial speed v0.
A nonconducting solid sphere of radius R has a volume charge density that is proportional to the distance from the center. That is, ? = Ar for r R, where A is a constant. (Use the following as necessary: 0, A, r, and R, as necessary.)
How far does the car go before it stops. An advertisement claims that a sportscar can accelerate from rest to 100 km/hr in 7.70 s.
A roller coaster car moves 200 ft horizontally and then rises 135 ft at an angle of 30 degrees above the horizontal, What is its displacement from its starting point
Two charged particles are located on the x axis. The first is a charge +Q at x = -a. The second is an unknown charge located at x = +3a, What are the two possible values of the unknown charge
A jumper in the long jump goes into the jump with a speed of 12.0 m/s at an angle of 20 degrees above the horizontal. How far does the jumper jump.
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