Relate Cause and Effect Plateaus are large, flat elevated areas of land. What is one way plateaus can form?

Consider the flow of water between two parallel plates in which one plate is fixed as shown in the given figure. The distance between the plates is $h$, and the speed of the moving plate is $V$. A person wishes to calculate the pressure difference between the plates and applies the Bernoulli equation between points 1 and 2,

$$z_1+\frac{p_1}{\gamma}+\frac{V_1^2}{2 g}=z_2+\frac{p_2}{\gamma}+\frac{V_2^2}{2 g}$$

and concludes that

$$\begin{aligned} p_1-p_2 &=\gamma\left(z_2-z_1\right)+\rho \frac{V_2^2}{2} \\ &=\gamma h+\rho \frac{V^2}{2} \end{aligned}$$

Is this correct? Provide the reason for your answer.

1. Find the interpretation table that accompanies the Ishihara color plates, and prepare a sheet to record data for the test. Note which plates are patterns rather than numbers.
2. View the color plates in bright light or sunlight while holding them about 0.8 m (30 inches) away and at right angles to your line of vision. Report to your laboratory partner what you see in each plate. Take no more than 3 seconds for each decision.
3. Your partner should record your responses and then check their accuracy with the correct answers provided in the color plate book. Is there any indication that you have some degree of color blindness? _____If so, what type?

A parallel-plate capacitor having circular plates of radius $R$ and separation $d$ is charged to a potential difference by a battery. It is then removed from the battery. If the plates are moved closer together
A. the amount of charge on each of them will increase.
B. the amount of charge on each of them will decrease.
C. the amount of charge on each of them will stay the same.
D. the energy stored in the capacitor increases.

A wire of radius $1.0 \mathrm{~mm}$ carries a current of $20.0 \mathrm{~A}$. The wire is connected to a parallel plate capacitor with circular plates of radius $R=4.0 \mathrm{~cm}$ and a separation between the plates of $s=2.0 \mathrm{~mm}$. What is the magnitude of the magnetic field due to the changing electric field at a point that is a radial distance of $r=1.0 \mathrm{~cm}$ from the center of the parallel plates? Neglect edge effects.

In a Millikan oil-drop experiment used to measure the elementary charge (Chapter 15), two horizontal parallel plates are $1.0 \mathrm{~cm}$ apart. With a 180-V potential difference between the plates, a charged droplet of mass $8.8 \times 10^{-16} \mathrm{~kg}$ is suspended motionless. (a) If the upper plate is at the higher potential, is the charge on the droplet positive or negative?

You wish to generate a uniform electric field of $2.0 \times 10^5 \mathrm{~N} / \mathrm{C}$ in the space between two flat parallel plates of metal placed face to face. The plates measure $0.30 \mathrm{~cm} \times 0.30 \mathrm{~cm}$. How much electric charge must you put on each plate? Assume that the gap between the plates is small so that the charge distribution and the electric field are approximately uniform, as for infinite plates. Assume the plates carry opposite charges of equal magnitudes.

A parallel plate capacitor of capacitance $C$ has plates of area $A$ with distance $d$ between them. When the capacitor is connected to a battery of potential difference $V$, it has a charge of magnitude $Q$ on its plates. While the capacitor is connected to the battery, the distance between the plates is decreased by a factor of 3 . The magnitude of the charge on the plates and the capacitance are then a) $\frac{1}{3} Q$ and $\frac{1}{3} C$. c) $3 Q$ and $3 C$. b) $\frac{1}{3} Q$ and $3 C$. d) $3 Q$ and $\frac{1}{3} C$.

A thin conducing plate $2.0 \mathrm{~m}$ on a side is given a total charge of $-10.0 \mu \mathrm{C}$. $(a)$ What is the electric field $1.0 \mathrm{~cm}$ above the plate? $(b)$ What is the force on an electron at this point? $(c)$ Repeat these calculations for a point $2.0 \mathrm{~cm}$ above the plate. $(d)$ When the electron moves from $1.0$ to $2.0 \mathrm{~cm}$ above the plate, how much work is done on it by the electric field?

During endochondral ossification of a long bone, ________. a. a primary ossification center will develop within the epiphysis b. mesenchyme will differentiate directly into bone tissue c. growth of the epiphyseal plate will produce bone lengthening d. all epiphyseal plates will disappear before birth

A parallel-plate capacitor is connected to a battery of electric potential difference V. If the plate separation is decreased, do the following quantities increase, decrease, or remain the same: the charge on the capacitor?

Which of the following is NOT a way that plate motions can cause changes in climate?

A. converging plates can form mountains that cause deserts

B. rifting can bring seas into new areas where they were not before

C. rapid seafloor spreading lowers sea level, exposing the continental shelves

D. moving plates can change the patterns of ocean currents

Calculate the drag of a thin square plate $(3 \mathrm{~m}$ by $2 \mathrm{~m})$ when it is towed through water $\left(10^{\circ} \mathrm{C}\right)$. Suppose a towing speed of about $2 \mathrm{~m} / \mathrm{s}$.

a. The plate is oriented for minimum drag.

b. The plate is oriented for maximum drag.

An air-filled parallel plate capacitor consists of square plates 10.0 cm on a side separated by 2.25 mm. (a) What is the capacitance of this arrangement? (b) The capacitor is then connected in series to a $500\Omega$ resistor and a 25-V DC power supply. What is the time constant of this circuit? (c) What plate spacing would double the time constant? (d) To double the time constant by changing the area, what would the new length of each side be? (e) To double the time constant by inserting a dielectric material to completely fill the space between plates, what dielectric constant would the material have to have?