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A 515 gram ball swings in a vertical circle at the end of a 2.9 meter long string. When the ball is at the bottom of the circle, the tension in the string is 16 Newton. Find the speed of the ball at that point?
m/s
Crew members attempt to escape from a damaged submarine 110 m below the surface. What force must be applied to a pop-out hatch
A wire whose resistance is R = 140 is cut into 9 equally long pieces, which are then connected in parallel. What is the resistance of the parallel combination
If a violin string vibrates at 440 Hz as its fundamental frequency, what are the frequencies of the first four harmonics
two sound waves oscillate in phase with a frequency of 100 hz to a point 5.00 m from a source and to 5.85 m from the
Angular acceleration and angular displacement of the rotor using the equation of motion in rotational dynamics.
A distant quasar is found to be moving away from the earth at 0.90 c. What is the recessional speed of the quasar as measured by astronomers in the other galaxy
a hike walks 4.5km in one direction, then makes a 45 degree turn to the right and walks another 6.4km. What is the magnitude of her displacement
Object O1 is 15.9 cm to the left of a converging lens with a 10.2-cm focal length. What is the overall magnification of this system
What is the result of mixing 80g of ice at -20 degrees Celsius, into a 200g of water at 20 degrees Celsius? What fraction of the ice cube melts
imagine removing one electron from every atom in a tiny cube of gold 1 mm on a side. never mind how you would hold the
a student adds two perpendicular displacement vectors of magnitude 12.0 cm and 8.0 cm. which of the following is the
At the instant a traffic light turns green a car that has been waiting at the intersection starts ahead with a constant acceleration of 2.00 m/s2. Determine the speed the car when it passes the truck
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