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Ilya [14]
3 years ago
7

4. How does a sound wave vibrate?

Biology
1 answer:
gavmur [86]3 years ago
6 0
When sound waves move through the air, each air molecule vibrates back and forth, hitting the air molecule next to it, which then also vibrates back and forth. The individual air molecules do not "travel" with the wave. They just vibrate back and forth.
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Explain the differences between Bacteria and Decomposers?​
zepelin [54]

Answer:

difference between bacteria and decomposer

Explanation:

Decomposers like bacteria and fungi don't eat their food, they decompose it externally. Also, decomposers consume nutrients on a molecular level while detritivores eat large amount of decaying material and excrete nutrients. ... In addition to fungi, bacteria are also decomposer organisms.

7 0
3 years ago
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The mean resting pulse rate for men is 72 beats per minute. a simple random sample of men who regularly work out at mitch's gym
tamaranim1 [39]

Claim: the mean resting pulse rate for men is less than 72 bpm.

Symbolic form would be: μ < 72

Step 1: null hypothesis  : μ > =  7 2 b p m

Step 2: alternative hypothesis:  μ <  7 2 b p m



Step 3: the test statistic is z = mean – μ / standard dev/sqrt (n) = -3/4 / 1.7639 = -1.92


Step 4: c v method: since z α = -1.645, the test static is z = -1.92 is less than the CV, we reject null hypothesis


            P Value method: area is 0.0274, since the p value is <= α, reject null hypothesis.

Step 5: the sample data support the claim that the mean resting pulse rate for men is less than 72 bpm.

5 0
3 years ago
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Use the drop-down menus to identify the terms described below.
Nikolay [14]

Endocrine gland - a group of cells that secretes substances into the blood or directly into an organ. Differ from exocrine glands, endocrine glands have no ducts and secrete products (hormones) directly into blood.  

Hormone - a substance produced by cells that helps specific groups of cells to perform specific functions. It is a product of endocrine gland which functions as chemical messengers to stimulate other cells.  

Duct – a channel or tube that conveys a substance.  It is part of the exocrine glands (such as salivary glands) which makes contact with surface .


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What occurs during a decomposition reaction?
blondinia [14]
During a decomposition reaction, a compound partitions into its components.
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3 years ago
8. Which type of skin cancer develops from melanocytes? A. Basal cell carcinoma B. Histamine C. Melanoma D. Squamous cell carcin
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C... definitely MELANOMA
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3 years ago
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