What frequency is received by the ambulance after reflecting from a wall near the person watching the oncoming ambulance (as in the previous problem). the ambulance is moving at 109 km/h and emitting a steady 821-hz sound from its siren

What is the approximate amplitude of this wave a.10 seconds b.15 centimeters c.30 centimeters d.15 seconds

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.

Which choice represents a pair of resonance structures? note that lone pairs have been omitted for clarity. view available hint(s) which choice represents a pair of resonance structures? note that lone pairs have been omitted for clarity. o=n−f and n=o−f o=o and f−f n≡c− and n≡c−h o−n=o and o=n−o?