Two identical nuclei of mass 18 u are made to unite to make a single nucleus of mass 36 u. What is the radius of the result of this fusion?
A) 4.5 fm B) 4.0 fm C) 6.3 fm D) 7.2 fm
B
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If all the components of a vector are equal to 1, then that vector is a unit vector
A) True B) False
A current of 4.0 A is maintained in a single circular loop having a circumference of 80 cm. An external magnetic field of 2.0 T is directed so that the angle between the field and the plane of the loop is 20°. Determine the magnitude of the torque exerted on the loop by the magnetic forces acting upon it
a. 0.41 N / m b. 0.14 N / m c. 0.38 N / m d. 0.27 N / m e. 0.77 N / m
You walk 55 m to the north, then turn 60° to your right and walk another 45 m. How far are you from where you originally started?
A) 87 m B) 50 m C) 94 m D) 46 m
Doubling the current, number of turns, the area, and the ambient magnetic field for a coil changes the maximum torque it experiences by what factor?
A. 2 B. 4 C. 8 D. 16 E. 32