Atoroid is constructed from insulated copper wire that has diameter 1mm. the cross-sectional diameter of the toroid is 1 cm. the radius of the toroid as measured to the center of its cross-section is 10.5 cm. the resistivity of copper is 1.7 x 10-6 ω-cm.
a) how many turns are there on this toroid?
b) calculate its self-inductance.
c) what is the energy stored in the toroid for an applied potential difference
of 0.1 v ?
d) what would be the value of a capacitor that would store the same energy if it was also charged to 0.1 v ?

Water at room temperature of 20.0°c is poured into an aluminum cylinder which has graduation markings etched on the inside. the reading in the graduations is 300.0 cc. the cylinder with the water in it is then immersed in a constant temperature bath at a temperature of 100°c. what is the reading for the level of water on the graduations of the cylinder after the water and the cylinder reach thermal equilibrium with the bath? the volume coefficient of expansion of water is 2.07 x 10^-4 k-1, and the linear coefficient of expansion of aluminum is 23.0 x 10^-6 k-1. a) 305.0 cc b) 304.0 cc c) 303.5 cc d) 303.3 cc e) 304.5 cc

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?