Explore In the AC generated illustrated above, a conducting loop rotates in the magnetic field of two permanent magnets. The magnetic field lines fill the gap from north to south. As the loop rotates, the magnetic flux through the loop changes from maximum in a given orientation to zero, then to maximum in the opposite orientation. This produces an induced voltage in the loop that is sinusoidal, where N is the number of turns in the rotating loop (N = 1 in the animation), B is the magnetic field produced by the permanent magnets, A is the area of the rotating loop, and ω is the angular frequency of the rotating loop.4

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?