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6. Match the description of a process with the corresponding arrow in the figure: a. Absorption of a photon whose energy is E₁ - Eo. E3 b. Absorption from an excited state (a rare event at ordinary temperatures). E2 c. Emission of a photon whose energy is E3 - E₁. d. Emission of a photon whose energy is E₂ - Eo. e. In drawing arrows to represent energy transitions, which of the following statements is correct? i. It doesn't matter in which direction you draw the arrow as long as it connects the initial and final states. E₁ ii. For emission, the arrow points down. iii. For absorption, the arrow points up. iv. The tail of the arrow is drawn on the initial state. Eo v. The head of the arrow is drawn on the final state. vi. It is not necessary to draw an arrowhead.
About how hot does something have to get to glow red hot? a.375 degrees F b.800 degrees F c.3000 K d.6000 K
One the selling points of golf balls is their durability. An independent testing laboratory is commissioned to compare the durability of three different brands of golf balls. Balls of each type will be put into a machine that hits the balls with the same force that a golfer uses on the course. The number of hits required until the outer covering cracks is recorded for each ball, with the results given the table below. Ten balls from each manufacturer are randomly selected for testing Brand A В 310 261 233 235 219 289 279 263 301 306 247 264 237 288 273 284 197 208 259 207 245 273 221 271 219 244 298 301 228 276 Is there evidence that the mean durability of the three brands differs? Use a=0.05
3. How much energy, in joules, does it take to raise a gallon of room temperature water, ~21.1°C, to boiling? Some useful values: kg gal Pwater = 3.79- J g°C Cw=4.18- 4. Consider the gallon of water from the scenario in the previous question. If we use a 600 square centimeter magnifying glass to focus the sun's light on the water, how long will it take to raise the water to boiling? Ignore any heat lost by the water during the process. Some useful values: The radiant power of the sun at noon on the Earth's equator is about 1,370 watts per square meter. That is 1,370 joules of energy every second over every square meter of the Earth near the equator.
3. How is +1.5 dioptre different from –1.5 dioptre? Definedioptre.
Thickness of the ozone layer The thickness of the ozone layer can be estimated using the formula In I, - In I = kx sec 0, where Io is the intensity of a particular wavelength of light from the sun before it reaches the atmosphere, I is the in- tensity of the same wavelength after passing through a layer of ozone x centimeters thick, k is the absorption constant of ozone for that wavelength, and 0 is the acute angle that the sunlight makes with the vertical. Suppose that for a wave- length of 3055 x 10-8 centimeter with k 1.88, Io/I is measured as 1.72 and 0 = 12°. Approximate the thickness of the ozone layer to the nearest 0.01 centimeter.
1. Calculate the energy of a photon of a green light (K=0.52µm). (Convert the wavelength to nanometer first.) 1946
4-B & C. Hi tutor pls show complete solution.Box final answers.
3. The amount of space that is occupied by an object. 8. The measure of hotness or coldness of an object. 12. A constant, a variable, or a product or a quotient of I. CROSS-WORD PUZZLE. Identify the term/s related to measurements and algebraic expressions. Write the answer to its corresponding box. IM 12 3. 6. 4 6 8 15 13 11 9. 14 10 ACROSS DOWN 1 Comes from the Latin word "mensura" and from a 2. The amount of liquid or solid a container can hold when it is full. 4. The basic unit for capacity. 5. The period during which an action or event Greek word "metron". 6. The basic unit of mass. occurs. 11. Letters to represent any numbers. 7. The basic unit of length in the metric system. 9. Used to measure temperature. 10. A measure of earth's gravitational pull. 13. Polynomial with one term. 14. Polynomial with three terms. 16. The meaning of the symbol "-". constants and variables. 15. The meaning of the symbol "4 ATCHING TYR EASURE
A high-altitude airplane is used to make observations a. at gamma-ray wavelengths. b. at X-ray wavelengths. c. in the ultraviolet. d. in the infrared.
4. Express the speed of light (3.00×10°m/s) in units of: a) ft/ns. b) um/ps.