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Q. A particular guitar string is supposed to vibrate at 191- Hz, but it is measured to actually vibrate at 210- Hz. By what percent should the tension in string be changed to get the frequency to the correct value? (Your answer must be positive for an increase and negative for a decrease in the tension.)
A sledge loaded with bricks has a total mass of 17.8 kg and is pulled at constant speed by the rope inclined at 20.4° above the horizontal. The sledge moves a distance of 20.7 m on a horizontal surface. The coefficient of kinetic friction between ..
An asteroid is discovered heading straight toward Earth at 13 . An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 , after which the asteroid is moving at 29 to its original path at a speed of 18..
when a dime (diameter 1.624 cm) is placed straight over it, bubble can be seen by looking down into the cube. What are upper and lower bounds of the range of the possible depths of the air bubble beneath surface.
What is the strength of an electric field at a distance r from the center, inside the sphere. Assume the sling thrower could gradually increase the speed of the stone.
A person wearing a safety belt can withstand an acceleration of -3.0 x 10^2 m/s2. How thick must barriers be to safely stop a car that hits a barrier at 112 km/h.
display a pendulum bob is suspended from a pivot. show that if I draw the pendulum back by an angle θ, the center of the bob is elevated by the distance.
Two packages at UPS start sliding down a ramp 40 degrees from the horizontal, Package A is sliding down in front of Package B. Package A has a mass of 3.50 and a coefficient of kinetic friction of 0.220. Package B has a mass of 8.00 and a coefficient..
A 150g ball and a 250g ball are connected by a 34cm long, massless, rigid rod. The balls rotate about their center of mass at 130 . what is the speed of ball of 150 g.
A 62 kg person on skis starts from rest down a hill sloped at 40° from the horizontal. The coefficient of friction between the skis and the snow is 0.10.
A uniform magnetic field of 0.50 T is directed along the positive x axis. A proton moving with the speed of 60 km/s enters this field. The helical path followed by the proton shown has a pitch of 5.0 mm. find the angle between the magnetic field an..
What is the magnitude of the centripetal acceleration.
Write x-versus-t equations of motion
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