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A certain single ion channel is selectively permeable to K and has a resistance of 1.15 G?, How many K ions travel through the channel during this time
A person weighs 75 N on the surface of the moon and 427 N on the surface of the Earth. What is the acceleration of gravity on the surface of the moon
A single 215Rn nucleus, initially at rest, emits an alpha particle as it decays into a 211Po nucleus, What is the total amount of nuclear potential energy, in joules, that was released in this process
A large circus ride has a centripetal acceleration at 6.0 m/s2. If the circular ride has a radius of 11.0 m, what is its velocity at the edge
A circular coil of wire 8.40cm in diameter has 16.0 turns and carries a current of 2.60A . The coil is in a region where the magnetic field is 0.580 T, What is this maximum torque in part (A)
There is an isolated point charge of q = +15 ?C. Using a test charge of q0 = +0.80 ?C, determine the E-field at point P which is 0.20 m away
Two blocks are connected by a very light string passing over a massless and frictionless pulley, Find the total work done on 20.0-N block if ?s=0.500 and ?k=0.325 between the table and the 20.0-N bloc
Two capacitors have the same plate separation, but one has square plates and the other has circular plates, at is the dielectric constant kcircular of the material between the circular plate
The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the flash, Assuming that the flash lasts for 4.6 ms, find the effective power or "wattage" of t
The electric potential energy stored in the capacitor of a defibrillator is 58 J, What is the potential difference across the capacitor plates?
A spark plug in an automobile engine consists of two metal conductors that are separated by a distance of 1.1 mm, What is the magnitude of the potential difference V between the conductors
The inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. Because of these charges, What is the magnitude of the electric field in the membrane
A horizontal magnetic field of 1.0x10^(-4) T is at an angle of 30 degrees to the direction of the current in a straight wire 75 cm long, what is the magnitude of the force on the wires
In order to determine the coefficients of friction between rubber and various surfaces, a student uses a rubber eraser and an incline. In one experiment, determine the coefficients of static and kin
An athlete crosses a 28 m-wide river by swimming perpendicular to the water current at a speed of 0.8 m/s relative to the water, How fast is the water in the river flowing with respect to the ground i
Spiderman, whose mass is 72.0 kg, is dangling on the free end of a 11.4-m-long rope, How much work was done by the gravitational force on Spiderman in this maneuver
Two very small objects, whose charges are +1.0 and -1.0 C, Find the magnitude of the attractive force that either charge exerts on the other
When switch S in the figure is open, the voltmeter V of the battery reads 3.10V . When the switch is closed, the voltmeter reading drops to 2.96V, Find the emf
A battery with an emf of 12.0 V shows a terminal voltage of 11.4V when operating in a circuit with two lightbulbs, What is the battery's internal resistance
Three 45-? lightbulbs and three 70-? lightbulbs are connected in series. What is the total resistance of the circuit
A ball is thrown horizontally from the top of a 85 m building and lands 140 m from the base of the building. What is the vertical component of the velocity just before the ball hits the ground in m/s
A 1200 kg car is moving with a velocity of 20 m/s when the brakes are applied uniformly, Find the braking force on the car by finding the acceleration of the car
Due to the wave nature of light, light shined on a single slit will produce a diffraction pattern, What is the width of the first order fringe
A circuit with 2 capacitors, C1= 36.0 microF and C2=28.0microF, are hooked up in a series with each other, How much electric potential, V, is applied to the circuit
A parallel plate capacitor has plates that measure 13.5cm long by 9.75cm wide, if this capacitor is placed into a circuit with 9.50V applied to it, how much energy can the capacitor store