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Science

What are radioactive isotopes?  

Radioactive isotopes can be called radioisotopes or radisotopes. I will refer to these as radioisotopes. Radioisotopes are “atoms that contain an unstable combination of neutrons and protons, or...

Latest answer posted December 4, 2020 5:53 pm UTC

1 educator answer

Science

How is the form of the mitochondrian related to its (their) function?

Mitochondria are amazing little organelles found in every cell of our bodies. They have several important functions. First, they make the chemical adenosine triphosphate (ATP) through a series of...

Latest answer posted December 4, 2020 7:49 pm UTC

1 educator answer

Science

How does the mechanical energy of a rock change as it falls from a mountain?

Mechanical energy is the sum of both potential and kinetic energies. Potential energy is energy of position and kinetic energy is energy of motion. Because energy is conserved, potential energy can...

Latest answer posted November 16, 2020 3:38 am UTC

1 educator answer

Science

What will cause an increase in the mechanical energy of an object?

In physics, mechanical energy is the energy that objects have due to their motion or position. Mechanical energy can manifest as kinetic energy (the energy that an object possesses due to its...

Latest answer posted November 16, 2020 2:07 am UTC

1 educator answer

Speech

A lot of emphasis in public speaking is put on the verbal message. But nonverbal aspects of your presentation are...

I will provide suggestions for you regarding how you can be an effective public speaker, especially in regard to non-verbal aspects of your presentation. First, you want to make sure you know your...

Latest answer posted November 19, 2020 4:34 pm UTC

1 educator answer

Science

What is a reasonable explanation as to why Newton's original interpretation of the Second Law focused on solving for...

The reason for the interpreting Newton's Second Law as focused on solving for acceleration rather then net force is that the acceleration determines the rate of change of velocity of an object. The...

Latest answer posted November 20, 2020 12:23 am UTC

1 educator answer

Science

What moral responsibility do scientists have? Should science be amoral?

This question is asking for a subjective response. There is not a definitively correct answer, and different people are likely to answer this question in completely different ways. A lot comes down...

Latest answer posted November 14, 2020 3:46 pm UTC

1 educator answer

Statistics

Why is an expanded concept of variation necessary in statistical improvement? Is all variation necessarily numerical?...

I think you could argue an expanded concept of variation is necessary in statistical improvement because it makes the study of statistics less mechanical. That is to say, students should be able to...

Latest answer posted November 1, 2020 1:44 pm UTC

1 educator answer

Science

How does the ketogenic diet affect the different systems of the body, such as the cardiovascular system, digestive...

A ketogenic diet is a high fat, low carbohydrate diet. From the perspective of most nutritionists and health textbooks, the diet goes against a standard carb-based diet. There are six nutrients...

Latest answer posted November 16, 2020 2:04 pm UTC

1 educator answer

Science

Once a healthy biological male has reached adulthood, do his cells continue to divide by both mitosis and meiosis?...

Mitosis and meiosis are similar processes of cell division. They are so similar that they use the same phase names to describe what is happening within the cell. The big difference between the two...

Latest answer posted December 1, 2020 6:51 pm UTC

1 educator answer

Science

Human beings are multicellular organisms. Using two examples from different body systems, explain the different...

The part of the question that directs you to explore different body systems isn't as daunting as it might look. This is because the body's organ systems are incredibly interconnected with each...

Latest answer posted December 1, 2020 7:32 pm UTC

1 educator answer

Science

Explain how the body uses carbohydrates, lipids, protein, vitamins, minerals, and water.

Carbohydrates perform a number of functions within the body. For starters, they provide and store the energy that you need to perform every task. The carbs that you consume are broken down and...

Latest answer posted November 12, 2020 10:32 am UTC

1 educator answer

Science

Is it true that humans use just 10 percent of their brains?

According to Dr. Robert H. Shmerling from the Beth Israel Deaconess Medical Center in the Harvard University Health Letter, "The notion that we use just 10 percent of our brains, or some other...

Latest answer posted November 13, 2020 12:46 am UTC

1 educator answer

Science

What are the differences in photosynthesis between eukaryotes and prokaryotes?

The basic difference in photosynthesis between eukaryotic cells and prokaryotic cells is where the photosynthesis occurs. The photosynthetic process is the same in both types of cells. Sunlight is...

Latest answer posted November 14, 2020 1:14 pm UTC

1 educator answer

Science

Explain how human embryonic stem cells and skin cells taken from the same person would be the same and how they would...

Both cells would contain some unique DNA to the person from whom they were taken. There are many differences between the two kinds of cells that you can explore. One main difference between skin...

Latest answer posted November 14, 2020 8:30 pm UTC

1 educator answer

Science

Mary is in an empty rectangular hall with dimensions 30 meters by 30 meters by 5 meters. She assumes the absorption...

To calculate reverberation time, we are going to use a famous formula "Sabine's formula," named for its inventor, Wallace Clement Sabine. Sabine did pioneering work to determine the power of...

Latest answer posted November 27, 2020 11:07 pm UTC

1 educator answer

Science

Describe the process of active and passive transport. Provide an example of each type of transport and briefly...

Cells need to move materials into and out of themselves, and cells have a variety of processes to make this happen. A key to moving materials through the cellular membrane is the fact that the...

Latest answer posted November 5, 2020 1:30 pm UTC

1 educator answer

Science

Describe the physical arrangement and chemical nature of the plasma membrane of a cell.

In most cells, the outermost boundary is the cell membrane (plasma membrane). Some cells, like plant cells, will have a cell wall outside of the plasma membrane. The plasma membrane functions to...

Latest answer posted November 5, 2020 1:51 pm UTC

1 educator answer

Science

Explain the bonding model involved in H-Cl.

HCl is also known as hydrogen chloride or hydrochloric acid. The bond that is created between these two atoms is a polar covalent bond, which essentially means that electrons are shared between the...

Latest answer posted November 6, 2020 7:48 pm UTC

1 educator answer

Science

Calculate the entropy changes for a 1.35 mol sample of a perfect gas, at 25°C, as it expands from a volume of 3L to...

The entropy change for a process is determined by `dS = (dQ)/T` , where `dQ ` is the heat transfer, and T is the temperature. By definition, the temperature stays constant during an isothermal...

Latest answer posted October 16, 2020 3:41 pm UTC

1 educator answer

Science

introduction about osmosis

The first person to conduct significant research into the biophysical process of osmosis was Wilhelm Pfeffer in 1877, although the term was first coined in 1854 by Thomas Graham. In order to...

Latest answer posted November 22, 2020 3:00 am UTC

1 educator answer

Science

What is senescence theory? Why does the power of natural selection decrease with age?

The process of senescence is the process of biological aging or growing old. The theory of cellular senescence proposes that aging of the body occurs as a consequence of cellular aging, or the...

Latest answer posted October 30, 2020 4:42 pm UTC

1 educator answer

Science

A single balloon has an upwards force that will allow it to suspend a 14-gram mass motionless above the ground at the...

The first thing to do in this problem is to calculate the upward force of the single balloon. This can be done by using Newton's second law of motion. The formula for force is Force = Mass x...

Latest answer posted November 19, 2020 4:34 am UTC

1 educator answer

Science

A bear comes along and applies a 240 N force to the television(which weighs 333N), causing the television slide and...

The weight of the television is equal to 333 N. The mass of the bear is given by m = 333/g = 333/9.8 = 33.98 kg. A force of 240 N is exerted on the television by the bear. Let the magnitude of...

Latest answer posted November 19, 2020 4:32 am UTC

1 educator answer

Science

A 58.0-kg sprinter starts a race with an acceleration of 3.40 m/s^2 . What is the magnitude of the net force acting...

This question is asking about Newton's second law of motion. Newton's second law of motion states that the acceleration of an object depends on the force applied to that object and the mass of the...

Latest answer posted November 19, 2020 1:13 am UTC

1 educator answer

Science

Write a summary about “Countdown to the Beginning of Time-Keeping” by Robert Garland.

Robert Garland's essay "Countdown to the Beginning of Time-Keeping" appeared in History Today in April 1999. Writing a summary of this essay requires us to determine the author's main point or...

Latest answer posted November 9, 2020 1:03 am UTC

1 educator answer

Science

Discuss how Paleoanthropologists think one trait such as bipedalism developed based on fossil evidence and then using...

First off, I recommend watching this documentary as a really great introduction to this fascinating topic: The Evolution of Us. Bipedalism is one of the first traits that separates early human...

Latest answer posted November 18, 2020 9:33 pm UTC

1 educator answer

Science

Define the characteristics of a healthful diet. How do the recommendations in MyPlate use these characteristics to...

A healthy diet is a diet that is balanced. To ensure that they have a balanced diet, people should eat a variety of different foods in moderation every single day. A balanced diet is important so...

Latest answer posted October 23, 2020 1:29 am UTC

1 educator answer

Science

Compare the acute and chronic toxicity associated with cocaine and amphetamines.

In regard to your posted question, acute refers to short-term (or even immediate) effects, and chronic refers to long-term (or cumulative) effects of cocaine and amphetamines. The acute effects of...

Latest answer posted October 14, 2020 12:57 am UTC

1 educator answer

Science

What is the scientific name for the water cycle?

A more formal name for the water cycle is the hydrologic cycle. This name comes from the word hydrology, which refers to the scientific study of water and its movement. The root word "hyrd" is...

Latest answer posted October 27, 2020 10:47 pm UTC

1 educator answer

Science

A man has a mass of 50 kg. He reaches his terminal velocity while falling after 10 seconds. What is the force of the...

A key to answering this question is the fact that the person falling is at terminal velocity. The information about it taking 10 seconds to arrive at that speed isn't necessary to solve the...

Latest answer posted October 27, 2020 3:51 pm UTC

1 educator answer

Science

Explaining the importance of good nutrition for optimum health for an overweight person.Distinguish the varying...

Regardless of whether or not a person is overweight or underweight, a nutrient balance is essential for proper diet and overall health and wellness. There are six nutrient groups that people need...

Latest answer posted November 16, 2020 12:56 am UTC

1 educator answer

Science

Please select an evidenced-based practice article that demonstrates sacred spaces or a sacred environment for...

Let's begin by identifying two possible articles you might use for this assignment. The first is Renee Thompson's “Creating Sacred Spaces in Healthcare,” found on the Healthy Workforce Institute's...

Latest answer posted November 15, 2020 7:14 pm UTC

1 educator answer

Science

What are the main points, and writing style of the first chapter of Lynn Nyharts book < Modern Nature, The Rise of...

You might have detected a few writing styles in the first chapter of Lynn Nyhart’s book. At first, you might have discerned an almost novelistic style of writing. In the opening paragraph, it’s as...

Latest answer posted November 15, 2020 6:40 pm UTC

1 educator answer

Science

An infinitely long nonconducting cylinder of radius R = 2.00 cm carries a uniform volume charge density of 18µC/m3....

This problems presents a symmetric (cylindrical) charge distribution. The electric field of such distribution can be found using Gauss's Law, which states that the electric flux through a given...

Latest answer posted October 15, 2020 5:27 pm UTC

1 educator answer

Science

Explore how soil restoration is critical to societal health, giving some examples.

Healthy, viable soil is important for sustaining any society, as soil can determine the quality of water sources and provide nutrients for farming and ranching. Likewise, good soil is important for...

Latest answer posted November 8, 2020 12:59 am UTC

1 educator answer

Science

A -3.0-μC point charge and a -9.0-μC point charge are initially extremely far apart. How much work does it take to...

The work required to bring the charges to the given points equals the electric potential energy of the system of two charges at these points. Since both charges are negative, the electrostatic...

Latest answer posted October 15, 2020 5:57 pm UTC

1 educator answer

Science

A long, straight horizontal wire carries a current I = 2.10 A to the left. A positive 1.00 C charge moves to the...

The magnetic field lines of a long current-carrying wire are concentric circles in the plane perpendicular to the wire. The direction of the field is determined by the right-hand rule. If the wire...

Latest answer posted October 15, 2020 7:51 pm UTC

1 educator answer

Science

Comparing the neuro-biological and cognitive approaches to psychology could be likened tocomparing the hardware with...

Since this question is asking you to compare neurobiological and cognitive approaches, it is best to dissect the elements of neuroscience as well as the elements of cognitive science. Doing this...

Latest answer posted November 10, 2020 11:30 pm UTC

1 educator answer

Science

Plum pudding model

This question appears to be asking about J.J. Thomson's contribution to modern day atomic theory. His discoveries contributed to our overall understanding of atoms, but it should be mentioned that...

Latest answer posted November 10, 2020 2:05 pm UTC

1 educator answer

Science

Describe How Cyclins Control The Cell Cycle?

Cyclins are responsible for activating cyclin-dependent kinases (CDKs), which are directly in charge of cell cycle regulation. Most species have one or more types of cyclins and CDKs present for...

Latest answer posted October 12, 2020 5:50 pm UTC

1 educator answer

Science

How Does A Galvanic Cell Work?

To answer this question, identify the parts of a galvanic cell and take a close look at the function of each part. A galvanic cell has various parts that are needed for it to function. The cell...

Latest answer posted October 12, 2020 5:38 pm UTC

1 educator answer

Science

Why Is The Genetic Code Degenerate?

The genetic code is used to translate DNA (which has nucleotides as building blocks) into proteins (which are built from amino acids). It is a scientific tool that was discovered in 1961 by Francis...

Latest answer posted October 12, 2020 4:57 pm UTC

1 educator answer

Science

Human beings are multicellular organisms. Explain the different levels of cell organization with the cardiovascular...

The cardiovascular system is made up of the heart, blood, and blood vessels. It works to bring nutrients to cells throughout the human body. The heart is made up of many small cells. It is...

Latest answer posted October 19, 2020 9:20 pm UTC

1 educator answer

Technology

The year 2019 will mark the fiftieth anniversary of the first host-to-host internet connection. Please think about...

This post is asking several questions, but it seems that the various questions are meant to spark possible ideas to write about rather than asking you to answer each of the questions separately....

Latest answer posted October 20, 2020 4:15 am UTC

1 educator answer

Science

The duodenum is a highly specialized part of the small intestine. Identify and explain how the structure of the...

Loose areolar connective tissue: This type of tissue is composed of collagen and other types of connective cells within an extracellular matrix. Because collagen is elastic, it can hold organs in...

Latest answer posted October 20, 2020 5:00 am UTC

1 educator answer

Science

Why are the cells of the palisades packed so tightly?

The palisade layer of a leaf is composed of parenchyma cells: this layer is where photosynthesis occurs. Parenchyma cells are present underneath the protective outer layer of the top of the leaf....

Latest answer posted October 16, 2020 6:03 pm UTC

1 educator answer

Science

Why does crossing not happen in mitosis?

During mitosis, a single parent cell replicates its genetic information before dividing into two daughter cells. The daughter cells are identical to each other, and they are identical to the...

Latest answer posted October 16, 2020 8:50 pm UTC

1 educator answer

Language

Discuss the development of libraries in the US.

Libraries in the United States of America date back to the early 1700s. The concept of libraries emerged from the rise and availability of non-religious texts and the growth of small book clubs...

Latest answer posted November 4, 2020 6:01 pm UTC

1 educator answer

Science

Is diamond an element, a compound, or a mixture?

This is a really fun question to explore. At first glance, a person is likely to answer that diamond is not an element. If diamond was an element, it would (or should) be listed on the periodic...

Latest answer posted November 4, 2020 1:32 pm UTC

1 educator answer

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