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A child slides down a slide with a 24 degree incline, and at the bottom her speed is precisely two-fifths what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child.
What is the magnification of an astronomical telescope whose objective lens has a focal length of 74 cm and whose eyepiece has a focal length of 2.9 cm
A transformer has 330 primary turns and 1340 secondary turns. The input voltage is 120 V and the output current is 15.0 A. What are the output voltage and input current
A showroom for a department store is to be rectangular with a 6 ft door opening in wall and 2/3 of the opposite wall replaced by a window. What dimensions for the showroom will minimize the length of wall used
The second order fringe when 800 nm light falls on a double slit is observed at a 12 degree angle to the initial beam direction. how far apart are the slits?
consider an object with s12cm that produces an image with s115cm. note that whenever you are working with a physical
Nutso the clown does a human cannon ball routine. He wants the peak of his flight to be 10 m up and 20 m out horizontally from the launch site (during a flaming hoop). What must his launch velocity be? Utilize both vector (component) and magnitude,..
The critical angle for a certain liquid-air surface is 43.8 degrees, what is the index of refraction of the liquid
A wheel (radius = 0.20 m) is mounted on a frictionless, horizontal axle. A light rope wrapped around the wheel supports a 0.50-kilogram object, as shown below. When released from rest, the object falls with a downward acceleration of 5.0 m/s2. What i..
According to one set of measurements, the tensile strength of hair is 196MPa , which produces a maximum strain of 0.380 in the hair. What is the magnitude of the force giving this tensile stress
A 63.9-µF capacitor is connected to a generator operating at a low frequency. The rms voltage of the generator is 3.60 V and is constant. at what frequency will the fuse burn out
a transformer can be used to step-up or step-down voltage. Since the power must be constant, What is the current in the primary
An object glides on a horizontal tabletop with a coefficient of kinetic friction of 0.3. If it comes to rest after 1.3 seconds, what was its initial velocity
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