Astudent hypothesizes that since elements in the same row have the same number of energy levels, they should behave the same in chemical reactions. explain why you agree or disagree with this hypothesis.

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?