What qualities are different from the language used with adults?

Producing Child-Directed Speech

Locate a doll that resembles an infant as closely as possible in features and size. Select a friend who has had experience with infants, and ask him or her to imagine that the doll is a niece or nephew who just arrived with parents for a first visit. Encourage your friend to interact with the ‘‘baby’’ in a normal fashion. Observe your friend’s language for qualities such as pitch, variation in pitch, vocabulary, sentence length, repetition, and intonation. Also observe any nonverbal communication. What qualities are different from the language used with adults?

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erive the differential equations in terms of the liquid heights h1 and h2.

  Figure 7.18 shows a liquid-level system in which two tanks have cross-sectional areas A1 and A2, respectively. The volume flow rate into tank 1 is qi. A pump is connected to the bottom….

Derive the differential equation relating the liquid height h and the volume flow rate qi at the inlet.

  Consider the single-tank liquid-level system shown in Figure 7.19, where the volume flow rate into the tank through a pipe is qi. The liquid leaves the tank through an orifice….

Derive the differential equations in terms of the liquid heights h1 and h2.

Figure 7.20 shows a hydraulic system of two interconnected tanks that have the same cross-sectional area of A. A pump is connected to tank 1. Assume that the relationship between the….