Above each noun, write Coll if it is collective or Not if it is not collective.

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Recognizing Collective Nouns. Underline the nouns in the following sentences. Circle the collective nouns.
Pickett led his brigade in a daring charge at Gettysburg.

How does the personal unconscious differ from the collective unconscious?

An umbrella tends to move upwards in a windy day principally because

a) air pressure is reduced over the curved top surface.

b) buoyancy increases with increasing wind speed.

c) air gets trapped under the umbrella, warms, and rises.

d) None of these.

Recognizing Collective Nouns. Underline the nouns in the following sentences. Circle the collective nouns.
An interesting speaker gave a presentation for the assembly today.

What are collective nouns with examples?

What is the "royal road to the unconscious" according to Freud?

Air that is at its dew point of $5^{\circ} \mathrm{C}$ is drawn into a building where it is heated to $20^{\circ} \mathrm{C}$. What will be the relative humidity at this temperature? Assume constant pressure of $1.0 \mathrm{~atm}$. Take into account the expansion of the air.

An air compressor compresses $6 \mathrm{~L}$ of air at $120 \mathrm{kPa}$ and $20^{\circ} \mathrm{C}$ to $1000 \mathrm{kPa}$ and $400^{\circ} \mathrm{C}$. Find the flow work, in $\mathrm{kJ} / \mathrm{kg}$, needed by the compressor.

Consider again the discussion in Section $7.2$ concerning air bags and impulse for a car colliding with a tree. The car's velocity of $40 \mathrm{mi} / \mathrm{h}$ is reduced to zero very quickly, but the head of a passenger is still moving at $40 \mathrm{mi} / \mathrm{h}$ (about $18 \mathrm{~m} / \mathrm{s}$ ). Calculate the average force exerted on the passenger's head coming to rest for the case:

(a) when it is stopped by the dashboard in $5.0 \mathrm{~ms}$

(b) when it is stopped by an air bag that compresses in $45 \mathrm{~ms}$

(c) Air bags must deploy quickly. If the distance berween the passenger's head and the dashboard is $60 \mathrm{~cm}$ and it takes the air bag $45 \mathrm{~ms}$ to safely bring the passenger to rest, how much time is there for the air bag to inflate?

The ________ content of a dream refers to the true meaning of the dream.
a. latent
b. manifest
c. collective unconscious
d. important

Recognizing Collective Nouns. Underline the nouns in the following sentences. Circle the collective nouns.
A pair of swans swam lazily around the lake.

The heat index displays apparent air temperatures in relation to the actual air temperature. The table shows the apparent air temperature for different humidity lévels given that the actual air temperature is $85 ^ { \circ } .$

$$\begin{matrix} \text{Humidity Level (percent)} & \text{10} & \text{20} & \text{30} & \text{40} & \text{50} & \text{60} & \text{70} & \text{80} & \text{90} & \text{100}\\ \text{Apparent Air Temperature F} & \text{80} & \text{82} & \text{84} & \text{86} & \text{88} & \text{90} & \text{93} & \text{97} & \text{102} & \text{108}\\ \end{matrix}$$

a. Use the data to make a scatter plot. b. Do the data values show a positive correlation, a negative correlation, or no correlation?

Assuming that air contains 78 percent $\mathrm{N}_2, 21$ percent $\mathrm{O}_2$, and $1.0$ percent $\mathrm{Ar}$, all by volume, how many molecules of each type of gas are present in $1.0 \mathrm{~L}$ of air at STP?