![]() ![]() It is these pressure waves that constitute the sound produced by the drum. The vibrations of the drum skin in Figure 1, for example, will cause the air above the drum to move back and forth, thus creating pressure waves that can travel through the surrounding air. PLEASE HELPPP How did Rebecca Nurse change through the Crucible? Which of the characteristics of life is displayed by the following statement: "When you step out into the cold, your body shivers in order to keep its temperatureĪll living things use energy Since Franklin was only four years old, he couldn't be left alone in the train station and needed someone to take custody of him. There is a 99% chance that her true score is between:Ĩ.2 - 31.8 In how many ways can Joe, Mary, and Brenda be seated around a round table? Use the cross product property to solve each equation: 5/7 = x/9 Determine the equation of the given conic in XY-coordinates when the coordinate axes are rotated through the indicated angle. There are 45 cans on the bottom, 42 cans on the next row, and so on, How many cans did they use in the display? QUESTION 4 Jane obtained a score of 20 on the financial risk-taking scale. Mark this and return A display of cans in a grocery store consists of 15 rows. To reduce the number of nuclear power plants worldwide To reduce pollution in the world’s oceans To reduce greenhouse emissions in China, Japan, and the United States Which of the following best describes the purpose of the 1997 Kyoto Protocol? Make sure to do the study again with the same participants. ![]() Create new operational definitions of his variablesĭ. Replicate his research study with different participantsĬ. Professor Black is unsure whether the results of his experiment are valid. Use the addition rule to determine the probability that a randomly selected order included the soup of the day or a side salad. The probability the soup of the day and a side salad were ordered was 0.3. The probability that a side salad was ordered was 0.4. The probability that the soup of the day was ordered was 0.6. What does "expedition" mean? Ellie has a new restaurant, and she tracked the menu items ordered in one day. What do I first? It says to solve the equation for the given variable. The fossil evidence suggests Homo sapiens evolved from premodern humans (Homo heidelbergensis) around 200,000 years ago in Africa Select one: Calculate the enthalpy change for the reaction: CaF2 + H2SO4 → 2HF + CaSO4 Given that enthalpy changes of formation of: AH = -1220 kJ mol-1. The most effective compounds that can fight off free radicals are antioxidants, just as the name implies they counteract oxidation, the harmful reaction that takes place. The foods with antioxidants are: all berries are great (strawberries, blackberries, blueberries, etc.), green leafy vegetables, carrots, tomatoes, dark chocolate, nuts, kidney beans and all beans, all herbs and foods mother nature provides us.ĭ. ![]() We know from our readings antioxidants are vitamin K and the minerals biotin and selenium.Ĭ. We can't stop aging or get rid of the sun or live in a perfectly clean world but we can provide our body antioxidants that will fight free radicals.ī. Stereoisomers that are not mirror images of one another and are non-superimposable on one another are called: Diastereomers Enantiomers Stereogenic Meso compounds Symmetrical The following explains information about antioxidants but one, which one is incorrect? a. HOPE THIS HELPS PLEASE MARK ME BRAINLIEST THANK YOU! In all the other cases it will not be zero If the interval lies between π/2 to 3π/2. the average voltage will be zero. Here we are going to check the average voltage for the time interval of 0.01sec. Which means that the time period of the wave if 1/50 = 0.02 sec. Thus irrespective of the number of photons present in the bright red light source, it will have no effect on the photosensitive surface's electrons.įrequency - 50Hz. Since, to eject an electron from the surface, it is essential to have a photon of the corresponding required energy to incident and get absorbed thus ejecting an electron with the corresponding energy. Thus the energy of the individual photon of red light is not sufficient to eject an electron from the photosensitive surface with the required amount oft energy. Thus the above relation shows that energy is inversely related to wavelength and directly related to frequency. The reason for this is because red light has the longest wavelength and contains larger number of photons as compared to the blue light.īut if the energy associated with a particular photon is to be considered than the energy of any individual photon is lower than the energy of any photon of blue light due to the lower frequency of the lower frequency of the red light. The overall energy of a very bright source of red light is more than that of the dim blue light source. ![]()
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