You have a piece of copper wire and a piece of carbon rod, each 1.5 m long and each having a cross-sectional area of 8.0 × 10−6 m2. When you connect the copper wire to the terminals of a 9.0-V battery, the current in the wire is I. Part A If you want to connect the carbon rod to another battery and have the same current I in the wire, what must the potential difference of the battery be? [ σcopper = 5.9 × 107 A/(V⋅m), σcarbon = 7.3 × 104 A/(V⋅m) ]

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

The pressure increases by 1.0 x 104 n/m^2 for every meter of depth beneath the surface of the ocean. at what depth does the volume of a pyrex (bulk modulus 2.6 x 1010n/m^2) glass cube, 9.8 x 10^−2m on an edge at the ocean's surface, decrease by 7.5 x 10−10m^3? explain the formula beyond this point: p=1.0x10^4, b=2.6x10^10, l=9.8x10^−2, delta v=7.5x10^−10. at some point l needs to be cubed. why p is divided by delta v?

The necleus of an atom is made up of what subatomic particles?