Astrong electromagnet produces a uniform magnetic field of 1.60 t over a cross-sectional area of 0.190 m2. a coil having 160 turns and a total resistance of 23.0 ω is placed around the electromagnet. the current in the electromagnet is then smoothly reduced until it reaches zero in 20.0 ms. what is the current induced in the coil?

If forces acting on an object are unbalanced. true or false

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f

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)