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The fundamental frequencies from a guitar string and a 440-Hz tuning forkinitially give 3 beats per second. However, when the string isloosened slightly, both its fundamental frequency and the beatfrequency decrease. Find the initial fundamental frequency of the guitar string.
A wrench is placed at 30 cm in front of a diverging lens with a focal length of magnitude 10 cm. What is the magnification of the wrench
How much work does a steam crane need to do in order to lift a 108,500 kg locomotive back onto the track if the locomotive has been derailed into a ditch 3.25 meters below the level of the tracks
A wire (mass = 50 g, length = 40 cm) is suspended horizontally bytwo vertical wires which conduct a current I = 8.0 A, What is the tension in eitherwire
Some object moves 220.0 m at an angle of 42° north of west. During this motion, a 68.0 N force acts on the same object, doing +5460.0 J of work on the object. what is this force's orientation
you throw a .4 kg ball against a brick wall it hits the wall moving left at 30 ms and rebounds to the right at 20 ms.
The elastic energy stored in your tendons can contribute up to 35% of your energy needs when running. Sports scientists have studied the change in length of the knee extensor tendon in sprinters and nonathletes. They find (on average) that the sprint..
to measure the acceleration due to gravity on a distant planet an astronaut hangs a 0.055-kg ball from the end of a
A beam of light enters water from air. if the angle of incidence is 50o, find the angle of refraction
A 0.55 kg- croquet ball is initially at rest on the grass. When the ball is struck by a mallet, the average force exerted on it is 200N. If the ball's speed after being struck is 3.5 m/s , how long was the mallet in contact with the ball?
a satellite of Jupiter, has an orbital period of 1.77 days and an orbital radius of 4.22 105 km. From these data, determine the mass of Jupiter
The active element of a certain laser is an ordinary glass rod 21.6 cm long and 1.22 cm in diameter. Calculate its increase in diameter
A vertical containery with base area measuring 14.0 cm by 17.0 cm is being filled with identical pieces of candy, each witha volume of 50.0 mm3 and a mass of 0.0204 g. Assume that the volume of the empty spaces between the candes is negligible. If th..
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