The drag coefficient of a car at the design conditions of 1 atm, 25°c, and 90 km/h is to be determined experimentally in a large wind tunnel in a full-scale test. the height and width of the car are 1.25 m and 1.65 m, respectively. if the horizontal force acting on the car is measured to be 230 n, determine the total drag coefficient of this car. take the density of air at 1 atm and 25°c as ρ = 1.164 kg/m3. (round the final answer to two decimal places.)

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

Acar travels 40m in 8 seconds find the car speed