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The middle-C hammer of a piano hits two strings, producing beats of 1.40 Hertz. One of the strings is turned to 240 Hertz. Find what frequencies could the other string have?
Two resistances, one 12 and the other 18, are connected in Parallel. What is the equivalent resistance of the parallel combination?
A small current loop of area A=0.0008m2 and moment of inertia I=6.9e-07kgm2 carries a current i=0.0039A with its magnetic moment perpendicular to the Earth's magnetic field. The magnitude of the Earth's field is B=4.2e-05T.
The Earth can produce the downward electric field of 150 N/C around its surface. Assume this electric field is uniform through the atmosphere. Estimate the net charge of the Earth
100 g ball of clay is thrown horizontally with a speed of 13m/s toward a 900g block resting on a frictionless surface. It hits the block and sticks. The clay exerts a constant force on the block during the 7 ms it takes the clay to come to rest re..
a solid wood door 90 cm wide by 2.00 m tall has a mass of 35.0 kg. it is ajar and at rest. a ball with a mass of 500 g is thrown perpendicular to the door with a speed of 20.0 m/s, how much energy is lost in the process
A cylinder is fitted with a piston, beneath which is a spring, as in the drawing. The cylinder is open at the top. Friction is absent. The spring constant of the spring is 4360 N/m. The piston has a negligible mass and a radius of 0.0300m.
A lens for a 35 millimeter camera has a focal length given by f =61 millimeter. Compute the magnification of the image on the film
A cyclist does work at the rate of 500 Watt while riding. Obtain how much force does her foot push with when she is traveling at 8.0 m/s
What is the highest compression of the spring for a perfectly inelastic impact.
A spider hangs from a strand of silk whose radius is3.6x10-6 m. The density of the silk is 1500kg/m3. When the spider moves, waves travel along the strand of silk at a speed of 210 m/s. decide the mass of the spider.
question a reflecting telescope has a main mirror with fm 540 mm. if an eyepiece with a magnification of 5 is used
An astronaut on Jupiter drops a rockstraight downward from a height of 1.20 m.If the acceleration of gravity on Jupiteris 24.8 m/s2, what is the speed of the rock when it lands
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