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The equation of a transverse wave on a string is y = (4.3 mm) sin[(19 m^-1)x + (300 s^-1)t] The tension in the string is 17 N. (a) What is the wave speed? (b) Find the linear density of this string in grams per meter.
Suppose a disk of radius R and mass M starts from rest at a height of 2.5m, What is the linear speed of the disk when it leaves the incline
A child goes down a playground slide with an acceleration of 1.34 m/s2. Compute the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 34.0° below the horizontal.
Water flows at 0.950 m/s from a hot water heater, through a 450-kPa pressure regulator. What's the flow speed in this pipe
The moon's diameter is 3.48 x 106 m, and its mean distance from the earth is 3.85 x 108 m. The moon is being photographed by a camera whose lens has a focal length of 60.0 mm.
A car accelerates from rest to a speed of 19.0m/s in 6.00 seconds. If the car weighs 16000N, what average power must the motor produce to cause this acceleration
You want to create a spherical mirror with a focal length of +15.0 cm. Will the mirror be concave or convex
A railroad car of mass M= 2000kg and speed(initial velocity) Vo= 8.50 m/s collides and couples to another car of equal mass and initially at rest, What is the final speed of the two coupled railroad cars
A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. how fast will the disk be turning
An electric vehicle starts from rest and accelerates at a rate of 2.4 m/s2 in a straight line until it reaches a speed of 14 m/s. How much time elapses from start to stop
A surgeon is attempting to correct a detached retina by using a pulsed laser. If the pulses last for 35.1 ms, how many photons are present in each pulse
Calculate the radius of its ground-state orbit, Calculate the energy of the electron in the ground state of double ionized lithium
A 0.25?F capacitor is charged to 80V . It is then connected in series with a 25?resistor and a 110? resistor and allowed to discharge completely
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