Suppose you stand in front of a tall rock wall that is 170 meters away. If you yell, how long does it take for the echo to get back to your ears if the speed of sound is 340 m/s?

You walk into a darkened room and turn on a flashlight. You see an image of the flashlight reflecting off a plane mirror in front of you. The image is 8.4 m away. How far away is the plane mirror? Explain.

Using the average atomic masses given inside the front cover of this book, calculate the mass in grams of each of the following samples.

c. $0.00101 \mathrm{~mol}$ of iron(II) sulfate, $\text{FeSO}_4$

A car has a circular turning radius of 16.1 ft. the distance between the two front tires is 4.7 ft. How much farther does a tire on the outside of the turn travel than a tire on the inside?

From the front to the back of the property Wally stepped off 40 paces. He estimated that each pace was a yard. Convert 40 yards to feet using a unit multiplier to estimate the depth of the property in feet.

A $4.5 \mathrm{~cm}$ tall object is placed $32 \mathrm{~cm}$ in front of a spherical mirror. It is desired to produce a virtual image that is upright and $3.5 \mathrm{~cm}$ tall. What is the radius of curvature of the mirror?

A transparent photographic slide is placed in front of a converging lens with a focal length of 2.44 cm. An image of the slide is formed 12.9 cm from the slide. How far is the lens from the slide if the image is real?

Two positive lenses with focal lengths of 0.30 m and 0.50 m are separated by a distance of 0.20 m. A small butterfly rests on the central axis 0.50 m in front of the first lens. Locate the resulting image with respect to the second lens.

Refer to the question $\mathrm{V}-\mathrm{G}$

What do the top view and right side views have in common with respect to the front view in terms of alignment?

$$\rule{1cm}{0.4pt}$$

$$\rule{1cm}{0.4pt}$$

A piston/cylinder assembly contains water at $200$ $\mathrm{kPa}, 200^{\circ} \mathrm{C}$ with a volume of $20 \mathrm{~L}$. The piston is moved slowly, compressing the water to a pressure of $800\ \mathrm{kPa}$. The loading on the piston is such that the product $P V$ is a constant. Assuming that the room temperature is $20^{\circ} \mathrm{C}$, show that this process does not violate the second law.

How do the oral histories in source 5 add to your understanding of home front involvement in the war effort? Does their testimony force you to question the other documents in any way, and if so, how?

For the simply supported beam subjected to the loading shown in Figure P7.12, (a) derive equations for the shear force $V$ and the bending moment $M$ for any location in the beam. (Place the origin at point $A$.) (b) plot the shear-force and bending-moment diagrams for the beam, using the derived functions. (c) report the maximum positive bending moment, the maximum negative bending moment, and their respective locations.

A function is defined by the following code:

double fractionToDecimal(double numerator, double denominator)
{
return (numerator/denominator);
}

Write a front-end driver you can use to test this function and check the passing of parameters.

Mark and David are loading identical cement blocks onto David's pickup truck. Mark lifts his block straight up from the ground to the truck, whereas David slides his block up a ramp on mass less, friction less rollers. Which statement is true? None of these statements is necessarily true because the angle of the incline is unknown.