Phân biệt hiện tượng nhiễu xạ và giao thoa ánh sáng. Khi chiếu ánh sáng đơn sắc và ánh sáng trắng vào 1 khe hẹp, ảnh nhiễu xạ thu được có gì khác và giống nhau? Hiện tượng nhiễu xạ và giao thoa ánh sáng được ứng dụng trong cuộc sống như thế nào?

Examine the nuclear reacti why is this classified as a nuclear reaction rather than a chemical reaction? it is not balanced. a new compound is formed. a change has occurred in a nucleus. a new element has been formed.

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.