A 10-m plank is being moved by rolling it over two cylindrical logs with a radius of 20 cm, placed 2 m from either end of the plank. As the plank is pushed, the logs roll on the ground without slipping, and they do not slip with respect to the plank
Through what angle will the logs have rotated when the plank has moved 2 m?
286°
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An RBE
A) is an effective dose of 1 Gy. B) is equivalent to 3.70 × 1010 decays/s in radium. C) is 10-2 J/kg. D) when multiplied into dosage, yields the effective dose. E) is an SI unit of absorbed dose = 1 J/kg = 100 rad.
In a completely inelastic collision between two objects where the mass of one is double that of the other, which of the following statements is always true?
a. The larger mass will always lose kinetic energy. b. The smaller mass will always gain kinetic energy. c. The momentum of the smaller mass will have a larger magnitude change than that of the larger mass. d. Not even one of the above statements is true.
Parallel-Plate Capacitor: An ideal parallel-plate capacitor consists of two parallel plates of area A separated by a distance d. This capacitor is connected across a battery that maintains a constant potential difference between the plates. If the separation between the plates is now doubled, the magnitude of the charge on the plates will
A. double. B. quadruple. C. be cut in half. D. be cut in fourth. E. not change.
The axis of a long hollow metallic cylinder (inner radius = 1.0 cm, outer radius = 2.0 cm) coincides with a long wire. The wire has a linear charge density of ?8.0 pC/m, and the cylinder has a net charge per unit length of ?4.0 pC/m. Determine the magnitude of the electric field 3.0 cm from the axis
a. 5.4 N/C b. 7.2 N/C c. 4.3 N/C d. 3.6 N/C e. 2.4 N/C