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Q. A rock with mass = 2.00 falls from rest in a viscous medium. The rock is acted on by a net constant downward force of = 15.8 (a combination of gravity and the buoyant force exerted by the medium) and by a fluid resistance force , where is the speed in and = 2.44 . Find the initial acceleration.
Q. A friend is working on a biology experiment and needs to create an electric field of magnitude 460 {rm N/C} at a distance of 10 {rm cm} from the central portion of a large nonconducting square plate 5.2 {rm m} on each side. She needs to know how much charge to put on the plate. What do you tell her?
You pull your little sister across a flat snowy field on a sled. Your sister plus the sled have a mass of 31 kg. The rope is at an angle of 30 degrees to the ground. As you pull with a force of 30 N, the sled travels a distance of 45 m.
A coin with a diameter of 3.00 cm rolls up a 30.0 degree inclined plane. The coin starts with the initial angular speed of 60.0 rad/s and rolls in a straight line without slipping. How far does it roll up the inclined plane.
A parallel beam of light from a He-Ne laser, with a wavelength of 662nm, falls on two very narrow slits 0.050 mm apart. How far apart are the fringes in the center of the pattern if the screen is 2.5m away.
What slit separation will produce first-order maxima.
A small but measurable current of 1.2*10^-10 A exists in a copper wire whose diameter is 2.5mm compute the current density and the electron drift speed.
A potential difference of 81 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the ce..
what advantage might there be in using two identical capacitors in parallel connected in series with another parallelpair, rather than using a single capacitor.
Calculate the magnitude, the direction of resultant force and the coefficient of kinetic friction.
A 1.00x10^2 kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.200. What must be the magnitude of P, so that the net work done by it and the k..
A rope applies a horizontal force of 180N to pull a crate a distance of 2m across the floor A frictional force of 60N opposes this motion.
Illustrate the cause of the components accelerating from rest down the conveyor.
What are the components of the ships displacement
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