Một người đi bộ từ A đến B với vận tốc bằng 6 km/h. Nếu người đó tăng vận tốc lên thêm 1,5 km/h thì đến nơi sớm hơn 1h a)tính quãng đường và thời gian dự định đi từ a đến b
b) ban đàu người đó đi với vận tốc v1=6km/h được một quãng đường là s1, thì dừng lại nghỉ 15 phút. Do đó trong quãng đường còn lại người đó đi với vận tốc v2=7,5km/h thì đến nới sớm hơn dự tính 30 phút. tìm quãng đường s1

Follow these directions and answer the questions. 1. set up the ripple tank as in previous investigations. 2. bend the rubber tube to form a "concave mirror" and place in the ripple tank. the water level must be below the top of the hose. 3. generate a few straight pulses with the dowel and observe the reflected waves. do the waves focus (come together) upon reflection? can you locate the place where the waves meet? 4. touch the water surface where the waves converged. what happens to the reflected wave? 5. move your finger twice that distance from the hose (2f = c of c, center of the curvature) and touch the water again. does the image (the reflected wave) appear in the same location (c of c)? you may have to experiment before you find the exact location. sometimes it is hard to visualize with the ripple tank because the waves move so quickly. likewise, it is impossible to "see" light waves because they have such small wavelengths and move at the speed of light. however, both are examples of transverse waves and behave in the same way when a parallel wave fronts hit a curved surface.

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?