Harry and Sally are on opposite sides of the room at a wedding reception. They simultaneously (in the frame of the room) take flash pictures of the bride and groom cutting the cake in the center of the room. What would an observer moving at constant velocity from Harry to Sally say about the time order of the two flashes?

A window is in the form of a rectangle surmounted by a semicircle. The rectangle is of clear glass, whereas the semicircle is of tinted glass that transmits only half as much light per unit area as clear glass does. The total perimeter is fixed. Find the proportions of the window that will admit the most light. Neglect the thickness of the frame.

Suppose that an astronaut wishes to visit the Andromeda galaxy, making a one-way trip that will take $30.0 \mathrm{yr}$ in the spacecraft's frame of reference. Assume that the galaxy is $2.00$ million ly away and that the astronaut's speed is constant. Determine the kinetic energy of his $1000 -$metric-ton spacecraft.

Lee las siguientes oraciones y completa las palabras con el prefijo correcto

Prefijos: des, extra, im, in, inter, mono, multi, poli, pos, re

Preguntas: 1- ¿Puedes decirme que dice aqui? Este texto es comprensible. 2-Despues del colonialismo sigui el ___ colonialismo. 3-Tienes muchas habilidades. Eres___facetica. 4-Ese periodista siempre dice lo mismo. Es___tematico. 5-¡Que caos! Definitivamente eres muy_ ordenado. 6- Los acuerdos politicos deben ser ____ laterales. 7- En el congreso participaran invitados de ocho paises; es ____ nacional. 8- Nada es____posible si trabajas para lograrlo. 9- Esta noticia no es oficial. Es____oficial.

Reproduced is a side view of given diagram of the situation described in section II of the tutorial.

Determine an expression for the lateral magnification, $m_1=h^{\prime} / h$, in terms of the object distance, $x_0$, and the image distance, $x_1$. (Hint: Draw the principal rays for the tip of the pencil and look for similar triangles. Clearly indicate the similar triangles that you use to determine your answer.)

Cuong bought a conical hat on a recent trip to central Vietnam. The basic frame of the hat is 16 hoops of bamboo that gradually diminish in size. The hat is covered in palm leaves. If the hat has a diameter of 50 centimeters and a slant height of 32 centimeters, what is the lateral area of the conical hat?

(II) A friend speeds by you in her spacecraft at a speed of $0.760 \mathrm{c}$. It is measured in your frame to be $4.80 \mathrm{~m}$ long and $1.35 \mathrm{~m}$ high. $(d)$ How many seconds elapsed on your watch when she saw $20.0 \mathrm{~s}$ pass on hers?

One of the simplest forms of learning is _____ defined as a decline in response to a(n) _____ harmless stimulus. A different type of learning in which an animal's nervous system is rigidly programmed to learn a certain behavior during a certain period in its life is called ______. The time frame during which such learning occurs is called the _____.

A $-4.80-\mu \mathrm{C}$ charge is moving at a constant speed of $6.80 \times 10^5 \mathrm{~m} / \mathrm{s}$ in the $+x$-direction relative to a reference frame. At the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points: $x=0, y=0.500 \mathrm{~m}$, $z=0 ;$

A cylinder of radius r and height h has volume $V=\pi r^{2} h$ and lateral (side) surface area $S=2 \pi r h.$ A circular disk of radius r has area $A = \pi r^2.$ A soda can holds 12 fluid ounces (approximately $6.89 \pi$ cubic inches). Express the surface area of the can as a function of its radius.

THE COW ATE THE HAY. If the letter C is deleted from this sentence, shifting the reading frame, we read THE OWA TET HEH AY. Which of the following mutations best explains this example?
a. spontaneous mutation
b. frameshift mutation
c. induced mutation
d. base substitution
e. transposon

The lateral (side) surface area of a cone of height h and base radius r should be $\pi r \sqrt{r^{2}+h^{2}},$ the semiperimeter of the base times the slant height. Show that this is still the case by finding the area of the surface generated by revolving the line segment $y=(r / h) x, 0 \leq x \leq h,$ about the x-axis.

Ashley takes her 3-year-old brother Alex into an antique shop. There are 4 statues, 3 picture frames, and 3 vases on a shelf. Alex accidentally knocks 2 items off the shelf and breaks them. Find each probability. P(breaking a statue, then a picture frame)

Which statement about the twin paradox is true? (a) Only one of the twins is in an inertial frame of reference. (b) The twin paradox has no solution. (c) The twin paradox is only theoretical; in reality, the twins would be the same age. (d) The effects of quantum mechanics are needed to resolve the twin paradox.