Some electronic devices such as phones and watches can be charged wirelessly. in the charger, there is a coil that generates a rapidly changing magnetic field. in the device, there is a second, 100-turn rectangular coil with side length of 3.0 cm and 4.0 cm. if the maximum rate of the change of the magnetic field and the second coil is 53 t/s, what is the emf induced in this coil?

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes