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The equation F = arv + br2v2 gives the magnitude of the resistive force (in newtons) exerted on a sphere of radius r (in meters) by a stream of air moving at speed v (in meters per second), where a and b are constants with appropriate SI units. Suppose their numerical values are a = 3.40 10-4 and b = 0.780. Using this formula, find the terminal speed for water droplets falling under their own weight in air, taking the following values for the drop radii. (a) 10.0 µm (b) 100 µm (c) 1.00 mm. Note that for (a) and (c) you can obtain accurate answers without solving a quadratic equation, by considering which of the two contributions to the air resistance is dominant and ignoring the lesser contribution.
In the nuclear-fission reaction, neutrons are emitted, usually some number of neutrons between 0 and 5. The process is thought to be random. First calculate the total number of fissions observed. Then calculate the average number of neutrons per f..
What is the velocity of each ball after the elastic collision? What will be the highest height of each ball after the elastic collision .
Waves on a 10 meter rope travel at 20 m/s. You shake the rope back and forth until you get a standing wave with a single antinode. find the wavelength and frequency of each standing wave
In a certain experiment, the pressure of a gas depends on the volume by P=alphaV^3+betaV^2, What is the work done on the gas
A microscope slide is placed in front of a converging lens with a focal length of 2.18 cm. The lens forms an image of the slide 10.3 cm from the slide. How far is the lens from the slide if the image is real
A 1.0--diameter oil droplet (density 900 kg/m^3) is negatively charged with the addition of 28 extra electrons. What is the surface charge density of the plane
A dentist uses a mirror to examine a tooth. The tooth is 1.04 cm in front of the mirror, and the image is formed 11.1 cm behind the mirror. Determine the mirror's radius of curvature
An object is solid throughout. When the object is completely submerged in ethyl alcohol, its apparent weight is 14.9 N. compute the volume of the object
Two cars have collided at right angles at an intersection: Car A was eastbound; car B was northbound. The marks on the pavement show that the vehicles both moved together in the same direction immediately after the collision. That direction was at..
Two fixed point charges are located along the x axis. A +8.5uC charge is placed at x=+3 cm and a -21uC is placed at x=9.0 cm.
Red light from three separate sources passes through a diffraction grating with 6.00×10^5 Lines/m. Calculate the angles for the first-order diffraction lines
You stand in the earth's magnetic field, directly facing it's horizontal component ( in other words, facing magnetic south). Compute the outward flux through your body's back surface
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