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A high fountain of water is located at the center of a circular pool as in the figure below. Not wishing to get his feet wet, a student walks around the pool and measures its circumference to be 40.0 m. Next, the student stands at the edge of the pool and uses a protractor to gauge the angle of elevation at the bottom of the fountain to be 55.0°. How high is the fountain?
m
A satellite has a mass of 5839 kg and is in a circular orbit 4.10 × 105 m above the surface of a planet. The period of the orbit is 1.7 hours. The radius of the planet is 4.88 × 106 m. What would be the true weight of the satellite if it were at rest..
A glass sheet 1.40 ?m (micrometer) thick is suspended in air. Calculate the minimum value of the index of refraction of the glass sheet that produces this effect
An object is placed 15 cm from a converging lens with a 5.0-diopter refractive power. At what distance from the object will the image be located
You are consulting for an amusement park that wants to build a new "Rotor" ride. What must be the angular speed in revolutions per minute
You have been visiting a distant planet. Your measurements have determined that the planet's mass is four times that of earth but the free-fall acceleration at the surface is only one-fourth as large
A particular constant, horizontal force exerted on a particular object free to slide on a level, what is the new value of acceleration
An electric field is constant at every point on a square surface that is 0.80 m on a side. Calculate the electric flux E passing through the surface
In the first part of the experiment you are asked to plot a graph of force versus length. What will be the expression for the slope of this curve
A spherical mirror is to be used to fom an image 5 times as tall as the object on a screen positioned 1 meter from the mirror. Find the type of mirror
What is the average kinetic energy of an ideal gas.
If linear momentum is conserved when there is no external force applied, how is angular momentum conserved? 2. The change in angular momentum with the change in time is equal to what?
Water flows through a fire hose of diameter 5.49 cm at a rate of 1.2 x10-2 m3/s. The fire hose ends in a nozzle of inner diameter 2.11 cm. What is the velocity with which the water exits the hose?
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