Consider two cylindrical conductors made of the same ohmic material. V1 ~E1 I1 ℓ1 r1 b V2 ~E2 I2 ℓ2 r2 b If rho2 = rho1 , r2 = 2 r1 , ℓ2 = 2 ℓ1 , and V2 = V1 , find the ratio R2 R1 of the resistances.

An experiment is designed to test the relationship between the initial height of a basketball before it is dropped to the height of its rebound bounce. the height of the rebound bounce is measured using a scale positioned behind the ball. in the above experiment, which condition would not be controlled? a). the starting height of the ballb). the surface the ball bounces on c). the type of ball d). the method to measure the rebound height of the ball

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)