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A 100 gram bead is free to slide a long a piece of 0.8 m long string ABC. the ends of the string are attached to a vertical rod at point A and B, which are o.4m apart. when the rod is rotated, BC is Horizontal and equals to 0.3m. (a) what is the tension in the string? (b) what is the speed of bead at C? c) what is the angular velocity at C d) what is the frequency of the rotation? e) what is the period of the rotation? any help?
A device used in radiation therapy for cancer contains 0.52 g of cobalt-60 (59.933 819 u). Determine the activity (in Bq) of the radioactive material
A Force F= (6xi+ 5yj), where F is in newtons and x and y are in meters, acts on an object as the object moves in the x direction, Find the work W = integral (F · d vector r) done by the force on the object
A worker in a radiation lab recieves a whole-body radiation dose of 29 mrad. Her mass is 65 kg. The radiation delivered by alpha particles for which the RBE is 12. What was the total energy absorbed by her body
Each of the plates of a parallel plate capacitor has an area of 10.6cm^2 and a plate separaton difference of 2mm. Calculate the charge on the capacator
find the mass defect (in u) for (a) helium-3 (2He3), which has an atomic mass of 3.016 030 u, and (b) the isotope of hydrogen known as tritium (1T3), which has an atomic mass of 3.016 050 u.
The magnetic field in a region of space is specified by its x, y, and z components which are respectively Bx = 0.138 T, By = 0.166 T, find the magnitude and direction of the force acting on the wire
A step-up transformer has 10 turns on the primary coil and 500 turns on the secondary coil. what input current and voltage are needed
An electron of mass 9.11E-31 kg has an initial speed of 3E5 m/sec. It travels in a straight line and its speed increases to 7E5 m/sec in a distance of 5.0 cm. What is the force on the electron
A father (m = 90 kg) and son (m = 45 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3 m/s after they have separated. How fast is the father moving.
What is the difference between the acceleration of his head and feet if the astronaut is 2.00 m tall.
A particular satellite was placed in a circular orbit about 167 mi above Earth. Determine the time required for one complete revolution
The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and approximate the human body by a rectangular block with a height of 1.66 m, Calculate the power emitted by the human body
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