Light from an argon laser strikes a diffraction grating that has 5314 grooves per centimeter. the central and first-order principal maxima are separated by 0.488 m on a wall 1.80 m from the grating. determine the wavelength of the laser light. (note: in this problem, assume that the light is incident normally on the gratings.)

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

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?