Answers
James West attended Temple University before working for Bell Labs. Along with Gerhard M. Sessler, he developed the foil electret microphone, an inexpensive, compact device that is now used in 90 percent of all contemporary microphones. A prolific writer as well, West has more than 250 patents and became a professor at Johns Hopkins University.
West was born on February 10, 1931, in Prince Edward County, Virginia. As a child, he was intrigued by how things worked and enjoyed taking apart appliances. "If I had a screwdriver and a pair of pliers, anything that could be opened was in danger," West would later recollect. "I had this need to know what was inside."
After an accident with a radio he had tinkered with, West became enthralled with the concept of electricity. He knew he wanted to pursue his interest in science academically, though his parents were concerned about future job prospects for an African American scientist, due to the racism and Jim Crow laws of the South. They preferred for him to become a physician.
Related Questions
please help me
Select items from the list below that are NOT characteristics of invasive species. Hint: there are four (4).
A. only plants
B. only animals
C. can be plants or animals
D. harmful to ecosystems
E. support biodiversity in ecosystems
F. have unique adaptations
G. come from the local environment
H. come from other parts of the world
I. introduced intentionally
J. introduced by accident
Answers
What elements make up brass alloys?
Answers
Answer:
Brass alloy is a composition of elements that define the structural properties It typically is composed of 66% copper and 34% zincI do exams and quizzes if your interested :)help pls i will give brainlest
Answers
Answer: its 5ft tall and 12 inches
Explanation:
Help! I don't have the things to do this and its due TODAY! Could someone help me?
Pull a balloon over the mouth of a bottle, and put the bottle in a saucepan of cold water. Slowly
heat the water over a stove. What happens to the balloon?
Take the bottle out of the water and allow it to cool. Now what happens to the balloon?
Explain, using the terms:
• molecule
• heat
• expansion
• contraction
Answers
Answer:
--- The hot air inside the bottle creates an expansion and when the hot water is applied a contraction occurs, thus causing the balloon to be sucked.
--- An internal pressure is produced, joining the heat begins to decrease. As a consequence, the air molecule causes the balloon to enter the bottle thanks to the effect of the external pressure.
Explanation:
I hope I have helped with something.
When the bottle is placed into the pan of hot water, the heat from the water causes the air inside the bottle to heat up. As the air in the bottle heats up, the molecules of the air begin to move faster and take up more space. The air from the bottle then moves into the balloon causing it to inflate.
What is heat?Heat is the transfer of kinetic energy from one medium or object to another, or from an energy source to a medium or object.
The hot air inside the bottle creates an expansion and when the hot water is applied a shrink occurs, thus causing the balloon to be contract.
Internal pressure is produced, joining the heat begins to decrease. As a consequence, the air molecule causes the balloon to enter the bottle thanks to the effect of the external pressure.
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You are given an unknown substance, which may be an acid or a base or may be neutral. To determine which, you will need to test for specific properties. Select the laboratory equipment below that would help classify this substance.
Answers
Inappropriate equipment-magnet, hot plate, beaker of water, conductivity tester, and balance
To determine the need to test for specific properties the equipment used is litmus paper.
What are specific properties?Specific properties are defined as a features of a material are generated from its other extensive and intensive properties. The uses of specific properties are Ranking, Classifying, and Comparing: Specific features can be used to compare two attributes while reducing the impact of differences in a third attribute.
Litmus paper is defined as a kind of paper that can be used to detect acidity because it changes color in relation to how acidic the solution it is dipped in is. As blue litmus paper turns red under acidic conditions, and red litmus paper turns blue under basic or alkaline settings, the primary application of litmus is to evaluate whether a solution is acidic or basic.
Thus, to determine the need to test for specific properties the equipment used is litmus paper.
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Choose the five physical tests for identifying rocks:
metamorphic
sedimentary
color
streak
hardness
luster
igneous
cleavage
Answers
1. Hardness
2. Luster
3. Color
4. Color
5. Streak
How might nutrients make their way from downstream to the upstream headwaters of the river?
Answers
Answer: A stream carves its path through a watershed, eroding nutrients from the soil and rock, or taking them from plants.
Explanation: Because, those nutrients flow through different branches of the food web. They may stay in that watershed for a long time or they may leave.
david turned on the television. The electrical energy turned into
Answers
Answer:
mechanical energy
Explanation:
Answer:
D. Light, sound and electricity.
Explanation:
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help me with this I only have one more
1156 g/L
= ________ kg/mL
Answers
The Answer is 0.001156.
1156 g/L = 1.156 kg/L
Since 1 L is equal to 1000 mL, we can convert kg/L to kg/mL by dividing by 1000:
1.156 kg/L = 1.156/1000 kg/mL
1.156/1000 kg/mL = 0.001156 kg/mL
Therefore, 1156 g/L is equal to 0.001156 kg/mL.
What is NOT true about genes and chromosomes?
Genese are located on chromosomes
Chromosomes are in the nucleus
A single chromosome can contain hundreds of genes
All of these are true
Answers
Let us go option by option :
1) Genes are located in chromosomes. TRUE
Chromosomes are in cell nucleus. A chromosome contains hundreds and thousands of genes. A normal have 23 pairs of chromosomes, and a total of 46.
2) Chromosomes are the in nucleus.
TRUE
Chromosome is structure found in nucleus of the cell. It is made up of protein and DNA.
3) A single Chromosome can contain hundreds of genes.
TRUE
single Chromosome can contain hundreds of tgenes.
4) All of the above
TRUE
As all the statements above are true. The correct option is 4.
Answer:
all of them are true
Explanation:
this is because chromosomes contain genetic materials and it is present in the nucleus.
Therefore, the correct option is 4) all of these are true
no problem
help please help help
Answers
Answer:
for question 8 the answer is a waste material
Answer:
1) Photosynthesis takes place in plants leaves.
2) Air containing carbon dioxide moves into plants leaves through tiny openings in the leaves.
3) Soil contains the water a plant needs for making food
Explanation:
An ionic bond involves the
Answers
Answer: Ionic bonding is a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions, or between two atoms with sharply different electronegativities, and is the primary interaction occurring in ionic compounds.
Explanation:
Choose all the answers that apply.
Nitrogen has an atomic number of 7. Its atomic mass is 14. Nitrogen has _____.
seven electrons
seven neutrons
seven electron shells
23 neutrons
14 electrons
Please help (:
Answers
N has 7 electrons
Neutrons= Mass no.- Atomic Number
= 14-7
N has 7 neutrons
N doesn’t have 7 electron shells because shell 1 can hold 2 electrons and shell 2 can hold 8 electrons
It doesn’t have 23 neutrons and 14 electrons
So, Seven Electrons and seven neutrons is correct
What was one was one important impact of Supreme Court's ruling in Bush v. Gore
Answers
Answer: the answer is b or c
Explanation:
I took it
What kinds of chemical reactions have you seen around your home? (Think about cooking or grilling.) Explain the evidence you have seen that they are chemical reactions.
Answers
Answer:
When your cooking, or baking a cake. For example, If you bake a cake you are adding ingredients to the cake. When you still the cake into the oven all the ingredients are reacting to each other, causing a chemical reaction.
Explanation:
What is the softest mineral on the Mohs Hardness Scale?
quartz
apatite
talc
science
Answers
The softest mineral on the Mohs Hardness Scale would C.talc
What is talc ?It has a hardness of 1 on the Mohs scale, which means that it can be scratched by a fingernail. Talc is a soft, white mineral that is often used in cosmetics and other products.
The Mohs Hardness Scale is a scale used to measure the hardness of minerals. It is a qualitative scale, meaning that it does not give a precise measure of hardness. However, it is a useful way to compare the hardness of different minerals.
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Only answer if you know 100% its correct. this means if your not sure, don't answer.
Answers
Answer:
D
Explanation:
The last one on there
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The statement which best describes solar electric energy is ~
Sunlight is converted to electricity in a photovoltaic cell.
In this process, the photovoltaic cell converts all the Sola energy derived from Sunlight into electricity.
Why is it easier for most metal elements to gain electrons rather than to lose them?
PROPER EXPLANATION
Answers
Because it is easier for metals to shed their valence electrons and form cations for a stable configuration, they have comparatively few chances of acquiring electrons.
The metals usually complete their octet in each reaction. The outermost electron shell often contains more electrons in metals. Metal atoms lose electrons when they interact with other non-metals because the energy of an electron in its outermost shell is very weak.
Metals often have low ionization energy because their electrons are positive in nature. Metals lose their electrons and trade them with non-metals to achieve a stable configuration.
To know more about electrons in metals elements,
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Answer:
metals typically have relatively low ionization energies
Explanation:
Water off the coasts of some continents is typically colder than water further offshore because…
A. What evidence have you discovered to explain why air flows?
B. What evidence have you discovered to explain why Earth has global wind systems?
C. What evidence have you discovered to explain why ocean waters flow?
D. What evidence have you discovered to explain how wind influences the movement of water?
And for the Summary.
Water off the coasts of some continents is typically colder than water further offshore because...
Answers
All of the following are units for pressure except _____. A. Pa B. psi C. atm D. Hg
Answers
Answer:
B. psi
Explanation:
Pa is Pascal
atm is atmosphere
Hg is Mercury
hope it helps.
Table sugar is a compound made of carbon, hydrogen, and oxygen. If sugar contains
41.86% carbon and 6.98% hydrogen, what percentage of sugar is oxygen?
Answers
Answer:
41.86
Explanation:
6.98 + 41.86 = 48.84
100 - 48.84 = 41.86
Which of the following was a major focus of the Mississippian belief system?
physical connection
an anointed leader
a single deity
spiritual connection
Answers
Answer:
i think answer is spiritual connection
A small gap is left between the rails in the railway track. Analyze the reason.
Answers
Answer:
There could be several possible reasons for a small gap between rails on a railway track, such as:
1. Expansion joints: Railways are designed to allow the tracks to expand and contract with changes in temperature. To accommodate this expansion, small gaps are left between the rail ends and filled with expansion joints or plates.
2. Wear and tear: Over time, the rails may experience wear and tear due to heavy loads, weather conditions, and other factors. As a result, small gaps can appear between the rails.
3. Maintenance: During maintenance activities, rail tracks may be adjusted or replaced, which could lead to small gaps between the rails.
4. Environmental factors: Environmental factors such as soil shifts, earthquakes or other natural disasters can also affect the alignment of the rails, leading to small gaps.
These are some of the possible reasons for a small gap between the rails on a railway track.
Answer:
The small gap left between the rails in a railway track is intentional and serves a specific purpose. This gap is known as the rail joint, and it allows for the expansion and contraction of the rails due to changes in temperature. When the temperature changes, the metal rails will expand or contract, and if they were joined together tightly, they could buckle or become deformed, which could be dangerous for trains passing over them. The rail joint allows the rails to move slightly and prevent damage to the track.
Additionally, the rail joint also allows for maintenance and repairs of the track. If there were no gap between the rails, it would be challenging to replace a damaged rail or perform routine maintenance, such as tightening bolts or lubricating joints. With the rail joint, maintenance personnel can easily access and work on the track.
Overall, the small gap left between the rails in a railway track is intentional and serves a crucial function in ensuring the safety and reliability of the track.
Need help with this.
Answers
Answer:
Explanation:
H3PO4.
Answer:
I'm pretty sure it's H3PO4
2NO2 --> N2 + 2O2
The above equation is what type of reaction?
A. single replacement
B. synthesis (composition)
C. decomposition
D. combustion
Answers
Since one reactant turns (decomposes) into two products, it is a decomposition reaction
Michael wants to know how different temperatures affect the growth rate of a bean plant. To make sure he has accurate and valid results he uses the same species of plants, amount of water, soil and pots. He observes the growth over a period of five days.
What is the test/independent variable in this investigation?
Answers
Answer:
This is the biology Study Island Scientific Investigations with all of the ... Tap again to see term ... She is planning on exposing frogs of the same species to different amounts of the ... Tyler wants to know how the growth of tomato plants is affected by the ... He hypothesizes that the plants will grow best in sandy soils.
Explanation:
Answer:
B
Explanation:
you always need all of them to be equal for it to ACTUALLY make sense.
hope this helped!!!
Answer asap in your own words!
What did Sir Isaac Newton conclude about color from his experiment with prisms?
Answers
Answer: Newton's experiment was to refract light onto a piece of wood, into which had been drilled a small hole. In this way, he was able to obtain a beam of light with pure color. He was able to show that blue light, for instance, when refracted through a second prism showed again only blue light.
Explanation:
A student decides to dissolve crackers in their soup as fast as possible. After increasing the surface area of the crackers, they want to allow more molecules of the soup to come in contact with the crackers.
What should be done next?
let the soup sit a few minutes
add salt to the soup
stir the soup with a spoon
cover the soup
Answers
Answer:
They can let the cracker sit in the soup for a few minutes
Answer:
stir the soup with the spoon
Explanation:
the crackers dissolve and disapear
What is the chemical test for water
Answers
Copper(II) sulfate in its purest form is white. Because it is devoid of water, it is also known as anhydrous copper(II) sulfate. A sample of copper(II) sulfate becomes blue when water is present.
• Temperature measurements
Temperature testing aids in determining the pace of biochemical reactions in an aquatic environment, as well as whether they can occur at all. If the water temperature is too high, the water's ability to contain oxygen is reduced, and organisms' ability to withstand certain contaminants is reduced.
• Checking the pH level
This instrument determines the acidity of water. The majority of aquatic species can only thrive in a pH range of 6 to 8.
• Test for chloride
Chloride may be found in both fresh and salt water. Mineral dissolution and industrial pollutants, on the other hand, can worsen its levels.
• Testing for salinity
The total amount of non-carbonate salts dissolved in water is calculated. The salinity of your groundwater can tell you how salty your topsoil will become as the water table rises.
• Oxygen Dissolved Test
The amount of oxygen dissolved in water is measured with this device. Aquatic life can't conduct cellular respiration without it, hence it's an important indication of water quality.
• Test for turbidity
Measures the quantity of suspended particle matter in the water, or, to put it another way, how clear the water is. When there is a lot of turbidity in the water, photosynthesis suffers because light can't get through, which raises the water temperature.
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How a mutation can cause cancer ?
Answers
Answer:
A mutation in a tumor suppressor gene allows cancer cells to continue growing and accumulating. Make mistakes when repairing DNA errors. DNA repair genes look for errors in a cell's DNA and make corrections. A mutation in a DNA repair gene may mean that other errors aren't corrected, leading cells to become cancerous.
Explanation:
Answer:
If a person has an error in a DNA repair gene, mistakes remain uncorrected. Then, the mistakes become mutations. These mutations may eventually lead to cancer
Explanation:
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