kaffolter25
31.12.2019 •
Biology
With this 4 i mark u as brainlist if u answer them correctly 20 points
Solved
Show answers
More tips
- F Family and Home Do You Really Need a Playpen for Your Child?...
- F Food and Cooking Do Aphrodisiacs Really Work? Separating Fact from Fiction...
- C Computers and Internet Log-in: what is it and why do you need it?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
Answers on questions: Biology
- B Biology Which of the following is an example of incomplete dominance? in a cross between tall plants and short plants, half the offspring are tall and half the offspring are short. a blue-eyed...
- B Biology Which one of the following is not a compound? select one: a. salt b. sugar c. cooking oil d. chocolate chip cookies...
- B Biology Water is important to plant cells because it is used as one of the reactants in the process of photosynthesis. what is another reason why water is important to plant cells? a.) water...
- B Biology Symmetry describes how a body can be divided into mirror image halves. how many types of symmetry are there? 1 type 2 types 3 types 4 types...
- B Biology Aprocedure designed to test a hypothesis...
- B Biology 3. Why were germinating seeds used instead of dormant (non- germinating) seeds?...
- B Biology Point mutation (like substitution) the answer choices is in the photo I draw a circle around the answer choicesASAP...
- B Biology The haploid number is 60, so that means the diploid number is * A) 60 B) 120 C) 30 D) 15 PLEASE HELP...
- B Biology Phases of meiosis//// ANSWER PLEASE...
- B Biology Which two chemicals, found in the sting gland, produce a synergistic response when combined?...
Ответ:
1. Decibels
2. whisper - 20-decibels, normal talking - 60 decibels, rock concert - 120 decibels
3. 10,000
4. A Jet plane
Explanation:
1. The unit refers to what specifically is being measured. If the graph was of heights, it could be metres, centimetres, feet, or inches, for example. In this case, the graph is of sound level. We can see beside the Y axis label "Sound Level" that the unit is decibels.
2. Take each individual sound source and look at how tall the bars are (purple rectangles). For each one, we can look across to the Y axis (left side) and see the corresponding sound level for each
3. We were told in the introduction to the question that for every 10 decibel increase, the sound increases by 10 times. So going from 10 -> 20 decibels represents a 10x increase, and 10-> 30 represents a 100x increase.
To figure out the increase from whisper (20) to normal talking (60), take away 20 from 60 to see how many decibels difference there are between the two levels.
60-20 = 40
There is a 40 decibel increase. If 10 decibel difference = 10x and 20 decibel difference = 100x, then 30 = 1000x, and 40 = 10,000x (keep adding a 0 with every 10!)
4. We can see from the graph that the pain threshold is 120 decibels. The sound level that is greater than the pain threshold (meaning it would be painful) is the jet plane.
Ответ:
1. Decibels
2. whisper - 20-decibels, normal talking - 60 decibels, rock concert - 120 decibels
3. 10,000
4. A Jet plane
Explanation: sorry but I don’t think I can explain right now because I have a lot of work to do
Ответ:
Mali is founded by Sundiata in 1235, after the decline and the collapse of Ghana. West Africa remained under Mali control for centuries. Then the Songhai rose to power. Songhai is founded by Sunni Ali and defeated the Malis, but later got conquered by Moroccans who had guns against the African bows. Muhammad Askia is the one who made Songhai a state rather than just a tribal kingdom. Both empires took advantage and prospered through the gold-salt trade.