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Water is flowing through a channel that is 12m wide with a speedof 0.75m/s. the water then flows into four identical channels thathave a width of 4.0 m. the depth of the water does not change as itflows into the four channels. What is the speed of the water in oneof the smaller channels?
A 0.250 kg mass is moving on the end of a spring (k =3.50 N/m) and is damped by a force: Fx = -bvx. If the constant b = 0.860 kg/s, what is the frequency of the oscillation
a steel cable of diameter 3.0 cm supports a load of 2.0kN. what is the fractional length increase of the cable compared with the length when there is no load if Y=2.0 x 10^11 Pa
A uniform electric field of magnitude7.5×105 N/C points in the positive xdirection. Find the change in electric potential energy of a5.5-\mu {\rm{C}}
A 0.2kg toy car rolls down ramp. If the car started from rest at a height of 0.30m, what is its speed at the bottom of the ramp? Incorrect: Your answer is incorrect. At the bottom, it hits another stationary car with equal mass. The two cars have Vel..
A centripetal force of 205 N acts on a 1,350-kg satellite moving with a speed of 4,900 m/s in a circular orbit around a planet. What is the radius of its orbit
A 4.00 {rm A} current runs through a 12 gauge copper wire (diameter 2.05 {rm mm}) and through a light bulb. Copper has 8.5 times 10^ {28} free electrons per cubic meter.
You do 9.5J of work to stretch a spring with k=210N/m, starting with the spring unstretched. How far does the spring stretch
What is the pressure change in water going from a 3.2- cm-diameter pipe to a 1.8- cm-diameter pipe if the velocity in the smaller pipe is 8.0 m/s
The filament of an incandandescent light bulb is a very thin solid cylindrical shape, with a total length of 450 mm and a diameter of 0.45 mm. What is the peak wavelength emitted by this light bulb
A standing wave is created on a string of length 1.0 m and fixed at both ends. What is the wavelength of the third harmonic
Find out the magnitude of the friction force acting on the case. Laser light with a wavelength = 680 illuminates a pair of slits at normal incidence. What slit separation would produce first-order maxima at angles of 40 from the incident direction.
A 3.50-g bullet, traveling at 250 m/s, hits a hinged, light board at right angles, at a distance of 55.0 cm from its hinges, What is the angular speed of the board
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