Two lasers are shining on a double slit, with slit separation ddd. Laser 1 has a wavelength of d/20d/20, whereas laser 2 has a wavelength of d/15d/15. The lasers produce separate interference patterns on a screen a distance 5.30 mm away from the slits. Part A
Which laser has its first maximum closer to the central maximum?
Part B
What is the distance \Delta _y__max-max_ between the first maxima (on the same side of the central maximum) of the two patterns?
Express your answer in meters.
Part CWhat is the distance \Delta _y__max-max_ between the second maximum of laser 1 and the third minimum of laser 2, on the same side of the central maximum?
Express your answer in meters.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 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. 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.

John throws .4 kg ball with velocity of 18 m/s. hits .2 kg bottle and bottle flies 25 m/s. how fast is ball traveling after hitting the bottle?

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h