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A concave mirror has a focal length of 30 centimeter. Explain what kind of image is produced by an object placed 60 centimeter from the mirror? Find where is it placed and determine what is its magnification?
an electric field varies in space according to this equation ex a x e-bx where a 1.353 ncm-1 and b 0.847 m-1.a for
The pressure and volume of this gas are kept constant, while the number of molecules is doubled. Illustrate what is the final translational rms speed of the molecules?
Two converging lenses, one with f = 4.5cm and the other with f = 44 cm, are made into a telescope. Assume these lenses are now combined to make a microscope; if the magnification needs to be 25 X, how long would the microscope be?
A loaded penguin sled weighing 88 N rests on a plane inclined at angle ? = 18° to the horizontal (see the figure). Between the sled and the plane, What is the minimum magnitude of the force
An aluminum baseball bat has a length of 0.817 meter at a temperature of 19.5°C. Find what is the final temperature of the bat
a projectile is fired at angle of theta from the horizontal with an initial velocity of vo. the projectile strikes the
A certain groove in a phonograph record moves past the needleat 30 cm/s. If the wiggles in the groove are 0.1 mm apart, what is the frequency of the sound that is produced
Water flows through a Venturi meter with a pipe diameter of 9.0 cm and a constriction diameter of 5.6 cm. Find the flow rate of the water in the pipe of 9.0 cm diameter
A cryogenic storage container holds liquid helium, which boils at 4.2 K. Suppose a student painted the outer shell of the container black, Determine the rate of heat loss due to radiation
A new circus act features a large frictionless cannon with an 2500 N/m spring mounted at the bottom of a long barrel which makes an angle of 37.0o with the horizontal. Find the speed of the acrobat when he reaches the top of the barrel. Use energy ..
How fast is the roller coaster moving at the top of the loop
a force of 500 N is requited to hold a spring in the state where it is compressed 0.1 m from its relaxed length. how much work was done to compress the spring
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