Ight of wavelength 585 nm falls on a slit 0.0655 mm wide. on a very large distant screen, how many totally dark fringes (indicating complete cancellation) will there be, including both sides of the central bright spot? solve this problem without calculating all the angles! (hint: what is the largest that sinθ can be? what does this tell you is the largest that m can be? )

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire