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The open end of a garden hose is directed horizontally, at aheight of 1.25 m above the ground. Water issues from the hoseand follows a falling parabolic trajectory to strike the ground2.35 m away. A gardener holding the hose wishes to water some plants that are 5.12 m distant. What fraction ofthe hose end should she cover with her thumb? Assume that shecontinues to hold the hose end horizontally at the same height, andbe careful to tell the fraction covered, not thefraction left open.
A man pushes a 2.0 kg broom at constant speed across thefloor. The broom handle makes a 50 degree angle with thefloor. He pushes the broom with a 5.0 N force. Find the accleration of the broom
The Syncom communication satellite was placed in its high-altitude geosynchronous orbit of radius 4.23 x 10^7m in two steps. What is the increase of total mechanical energy during this change of orbit
A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +2.3. What is the magnification when the convex side is used as a mirror
An electric power station is producing 1 x 10+3 W of power that is to be sent to a small town located 11 km away. Eachof the two wires that comprise the transmission line has aresistance per kilometer of length of 4 x 10-2 Ohms /km.
Determine the reading of the constructed ammeter inaperes assuming that the deflection represents 0.75 ampere.
A convex mirror has a focal length of -39.0 cm. A 12.0 cm tall object is located 41.0 cm in front of this mirror. Using a ray diagram drawn to scale, determine the size of the image
a person walks first at a constant speed of 2.3 ms along a straight line from point a to point b and then back along
A nonuniform, horizontal bar of mass 3.43 is supported by two massless wires against gravity. The left wire makes an angle 36.6 , with the horizontal, and the right wire makes an angle 62.9 .
A particle with charge of 28.3 µC is placed at the center of a spherical shell of radius 27.5 cm. find the total electric flux through the surface of the shell
A ball is thrown from a point 1.0 m above the ground. The initial velocity is 19.8 m/s at an angle of 34.0° above the horizontal. Find the maximum height of the ball above the ground
two events occur in an inertial system k at the same time but 7 km apart. what is the time difference measured in a
a certain elevator cab has a total run of 190 m and a maximum speed of 305 mmin and it accelerates from rest and then
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