With all his gear Noel Armstrong weighed almost 360 pounds on earth when he landed on the moon he weighed 60 pounds why
Answer: C.
The gravity on the Moon is less than the gravity on Earth.
Explanation: plato :3
The gaia hypothesis is an example of
The Gaia Hypothesis is an example of negative feedback.
We have an object with a density of 620 g/ cm3 and a volume of 75 cm3. What is the mass of this object?
Which term best describes how the solar system form?
Determine y for the following equation: log(9/8)=y
an experimental container has volume of 13000 L has an internal pressure of 1.38 atm. if the pressure inside the container becomes 250 atm, what would the new volume have to be ? assume all other properties remain constant ?
The new volume is 71.76 L
calculation
The new volume is calculated using the Boyle's law formula
that is P1V1=P2V2 where,
P1=1.38 atm
V1= 13000 L
P2 =250 atm
V2= ?
make V2 the subject of the formula by diving both side by P2
V2= P1V1/ P2
v2=( 1.38 atm x 13000 L) / 250 atm = 71.76 L
If one cubic centimeter of lead has a mass of 11.3 grams, what is its density? A.11.3 g/cm3
B.11.3 cm/g3
C.11.3 N
D.11.3 cm3/g
a mid-ocean ridge forms at what type of plate boundary
Answer:
a mid ocean ridge or mid oceanic ridge is an underwater mountain range formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma.
A mid-ocean ridge forms at a divergent plate boundary, where tectonic plates move apart and create new seafloor through a process known as seafloor spreading.
Explanation:A mid-ocean ridge typically forms at what's known as a divergent plate boundary. This is a location where two tectonic plates are moving away from each other, leading to the creation of new seafloor. As the plates diverge, magma from the Earth's mantle rises to fill the gap, and cools to form new crust. This process, known as seafloor spreading, results in the formation of mid-ocean ridges - undersea mountain ranges that are, collectively, the longest mountain range on our planet.
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What are the subatomic particles of an atom
Answer:
Explanation:
Subatomic particles are the structures of matter that are smaller than the atom, and that are part of it and determine its properties. These particles can be of two types: compound and elementary, that is, divisible (composed of other subatomic particles) and indivisible respectively.
The atom is made up of three stable particles: electron, proton and neutron and these particles are in turn composed of others, still smaller. So, currently the existence of the following subatomic particles is known, in addition to the three previously mentioned:
Boson Positron Fermion Neutrino Hadron Lepton Quark MesonDue to their low stability and size, these particles are very difficult to study and discover.
Please help I will reward brainly to the correct answers
Base your answer to the question on the information below and on your knowledge of chemistry. Elements with an atomic number greater than 92 can be artificially produced in nuclear reactions by bombarding a naturally occurring nuclide with a different nuclide. One of these elements is roentgenium, Rg. The equation below represents a nuclear reaction that produces Rg-272. Determine the number of neutrons in an atom of Rg-272. Time on question: 00:01:44
To find the number of neutrons in Roentgenium-272 (Rg-272), subtract its atomic number (111) from its mass number (272), resulting in 161 neutrons.
The student is asking to determine the number of neutrons in an atom of Roentgenium-272 (Rg-272). To calculate the number of neutrons in an atom of Rg-272, we use the mass number of the isotope and the atomic number of the element.
Roentgenium (Rg) has an atomic number of 111, which is the number of protons in the nucleus of the atom. The mass number of Rg-272 is the sum of protons and neutrons together. Since we know the atomic number of Rg is 111, the calculation to find the number of neutrons is:
Number of neutrons = Mass number - Atomic number
Number of neutrons = 272 - 111
Number of neutrons = 161
Therefore, an atom of Rg-272 has 161 neutrons.
Which statement is true about the Milky Way? It is a big planet. It contains the universe. It has an irregular shape. It has several billion stars.
Answer "The correct option is "It has several billion stars"
Explanation :
Milky way is the name of the galaxy in which our solar system is present. The name is given because of its appearance. This galaxy has a spiral shape when seen from outer universe and looks like a disk when viewed from earth.
The milky way is one of the galaxies in the universe and contains several billion stars.
The option "It is a big planet""is not correct because we know that it contains billions of stars and plants and not just one big planet.
The options "It contains the universe" is not correct because it is one of the galaxies present in the universe.
The option "It has an irregular shape" because we know that it has a definite spiral shape.
Therefore the only option that is correct is "It has several billion stars"
energy and work. work are work are both measured in what unit
Final answer:
Work and energy are measured in joules, which is the SI unit representing the amount of work done by a force of one newton over one meter, with 1 joule being equivalent to 1 newton-meter (N·m).
Explanation:
Work and energy are both measured in the same unit, which is the joule (J). In the International System of Units (SI), a joule is defined as the amount of work done when a force of one newton is applied over a distance of one meter. Therefore, 1 joule is equal to 1 newton-meter (N·m), which is also the equivalent of 1 kilogram-meter squared per second squared (kg·m²/s²). For example, one joule is the amount of energy required to lift a small 100-gram apple approximately 1 meter against the force of gravity.
Energy can be defined as the capacity to do work. Since work is calculated as force times distance, the SI unit for energy and work reinforces the relationship between these concepts, making joules a common unit to express both. The work-energy theorem explains how work is transformed into kinetic energy and further reinforces the use of joules as a unit of measurement for these terms.
Justine took a sip of milk and immediately spat it out because she realized it had soured.
Which path did messages in her nervous system follow to cause this reaction?
sensory neurons → sensory receptors → motor neurons → interneurons
sensory receptors → sensory neurons → interneurons → motor neurons
motor receptors → interneurons → sensory neurons → sensory receptors
sensory receptor → interneurons → Sensory neuron → motor neurons
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A pea plant with round seeds (Rr) is crossbred with another pea plant with wrinkled seeds (rr). What is the probability of offspring having wrinkled seeds?
A) 0%
B) 25%
C)50%
D)75%
The element that has the most important effect on the weldability of common gray cast iron is? A. copper B. Carbon C. Steel D. Sulphur
The correct option is b i.e, Carbon significantly affects the weldability of common gray cast iron due to its high content and impact on microstructure, leading to potential brittleness and cracking during welding.
The element that has the most important effect on the weldability of common gray cast iron is notably carbon. Gray cast iron contains a high percentage of carbon, typically between 2.5% and 4.0%, which forms large graphite flakes within an iron matrix. These graphite flakes give gray cast iron its characteristic properties, such as good machinability and vibration damping, but they also create challenges during welding because they can lead to brittleness and cracking in the heat-affected zone.
Carbon's presence in high concentrations impacts the microstructure of the iron, making the weldability more complex compared to other elements like copper, steel, or sulfur. This is primarily because excessive carbon can lead to the formation of hard and brittle phases during cooling, which complicates the welding process.
(3 Points)
Which statement correctly compares radio waves and microwaves?
A. Radio waves have a higher frequency than microwaves.
B. Radio waves have shorter wavelengths than microwaves.
C. Radio waves have lower radiant energy than microwaves.
D. Only radio waves are used in communication.
Final answer:
Radio waves have lower frequency and longer wavelengths than microwaves, which means they also have lower radiant energy. Thus, the correct statement comparing these two types of electromagnetic waves is that radio waves have lower radiant energy than microwaves. So the correct option is C.
Explanation:
The question asks to compare radio waves and microwaves in terms of their characteristics within the electromagnetic spectrum. Radio waves have longer wavelengths and lower frequencies compared to microwaves. Among the options provided, the correct statement would be that radio waves have lower radiant energy than microwaves since energy in electromagnetic waves increases with frequency and decreases with wavelength. Both radio waves and microwaves are used in various communication technologies, so the statement that only radio waves are used in communication is incorrect.
starch is made up of _ elements
if a standard die is rolled twice what is the probability of getting a perfect square,then a number that is less than 5.
If a standard die is rolled twice, the probability of getting a perfect square is 1/9 and a number that is less than 5 is 1/16.
What is probability?Probability is a branch of mathematics which tells about the chances of occurring in something.
There are three squares in a standard dice. 1, 2, 4. If there are two dices, then the probability of getting squares are 1/3 x 1/3 = 1/9.
There are four numbers less than 5, so
1/4 x 1/4 = 1/16.
Thus, the probabilities are 1/9 and 1/16.
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across a period, how does the electronegativity of a nonmetal affect the acidity of its binary hydride
+ oxygen carbon dioxide + water + energy
Sunlight
Sugar
Oxygen
Carbon
Answer:
Glucose
Explanation:
i took flvs 8th grade
HOW MANY HYDROGEN ATOMS IN AN ACYCLIC ALKANE WITH 12 CARBON ATOMS
An acyclic alkane with 12 carbon atoms will contain 26 hydrogen atoms, as determined by the formula for noncyclic alkanes, CnH2n+2. Alkanes consist of carbon and hydrogen atoms, and the number of carbon atoms in an alkane can vary widely.
Explanation:The number of hydrogen atoms in an acyclic alkane with 12 carbon atoms can be found using the general formula for noncyclic alkanes, which is CnH2n+2. Here, 'n' represents the number of carbon atoms. Thus, if an acyclic alkane has 12 carbon atoms, you can substitute 12 into the formula to get: C12H2(12)+2 = C12H26. This means that an acyclic alkane with 12 carbon atoms will contain 26 hydrogen atoms.
All alkanes are composed of carbon and hydrogen atoms, and have similar bonds, structures, and formulas; noncyclic alkanes follow the formula of CnH2n+2. The number of carbon atoms present in an alkane has no limit. Greater numbers of atoms in the molecules lead to stronger intermolecular attractions (dispersion forces) and correspondingly different physical properties of the molecules.
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PLEASE HELP!!! Which features do sound waves have that ocean and light waves do not? Check all that apply.
compressions
rarefactions
amplitude
wavelength
crests
frequency
speed
Final answer:
Sound waves are unique compared to ocean and light waves due to their compressions and rarefactions, as these are properties of longitudinal waves. Both ocean and sound waves have amplitude, wavelength, frequency, and speed, but sound waves compress and expand the medium they travel through.
Explanation:
Sound waves differ from ocean and light waves in specific ways, particularly in terms of compressions and rarefactions. Unlike ocean waves which are transverse waves characterized by crests (the highest points) and troughs (the lowest points), sound waves are longitudinal waves, which means their displacement is parallel to the direction of wave propagation. The compressions are regions where the medium through which the sound is traveling is compressed, while rarefactions are regions where the medium is less dense or stretched apart.
Common features like wavelength, amplitude, frequency, and speed are shared among sound, ocean, and light waves. Wavelength is the distance between two contiguous compressions or rarefactions in a sound wave. Amplitude is the maximum displacement of points on a wave, which corresponds to the volume in sound waves. Frequency is the number of waves passing a point per unit time, and speed is how fast the wave travels through a medium.
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Which of the following [H+] values describes the most acidic solution?
10^- 1 M
10^-7 M
10^-12 M
The most acidic solution is represented by a hydrogen ion concentration of 10^-1 M, which is higher than 1 x 10^-7 M, indicating higher acidity.
Explanation:The one that describes the most acidic solution among the given hydrogen ion concentrations is 10^-1 M. The acidity of a solution is determined by the concentration of hydrogen ions ([H+]), also referred to as hydronium ions ([H3O+]). A higher concentration of these ions means the solution is more acidic. According to the provided reference material, a solution is acidic if [H3O+] > 1 × 10^-7 M, neutral if [H3O+] = 1 × 10^-7 M, and basic if [H3O+] < 1 × 10^-7 M. Therefore, a concentration of 10^-1 M is significantly greater than 1 × 10^-7 M, indicating a very acidic solution.
The most acidic solution among the given options is 10-1 M.
To determine acidity, we compare the [H+] values. A solution is considered acidic if its [H+] concentration is greater than 1 × 10-7 M. In this case, 10-1 M is much greater than 1 × 10-7 M, making it the most acidic solution.
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What type of reaction will occur if ∆H is negative and there are no significant entropy effects?
acid-base reaction
redox reaction
endothermic reaction
spontaneous reaction
Final answer:
When ΔH is negative and entropy effects are negligible, the reaction is likely spontaneous because it is exothermic and releases heat, contributing to a negative Gibbs free energy which predicts spontaneity.
Explanation:
If a reaction has a negative ΔH (delta H), and there are no significant entropy effects, meaning the change in entropy (δS) is not large enough to influence the reaction significantly, the reaction is likely to be spontaneous. This is because a negative ΔH indicates that the reaction is exothermic, which means it releases heat. In the absence of significant entropy effects, the exothermic nature of the reaction would drive it towards spontaneity as per Gibbs free energy (ΔG = ΔH - TΔS), which would be negative when ΔH is negative and ΔS is negligible or positive.
why is radioactive decay a good method of measuring the absolute age of ancient fossils
Answer:
All ancient fossils contain C-14
Explanation:
All living things contain more than one isotope of carbon, the most prominent being, carbon -12 and carbon-14.
Carbon-14 is a radioactive isotope of carbon. When the artifact is retrieved, the activity of carbon-14 in that sample is matched with the carbon-14 activity of a living organism. When this is done, the age of the fossil can easily be accurately calculated.
On the basis of which property of the elements are they divided into metals and non metals?
Genetic engineering can be applied to many fields, including medicine and agriculture. Which of the following is a medical application of genetic engineering?
A.
analyzing a person's DNA to see how closely they are related to another person
B.
inserting genes into bacteria so that they will produce a needed medicine
C.
giving crop plants recombinant DNA so that they will be resistant to herbicides
D.
examining a person's pedigree to determine whether they carry a gene for a genetic disease
ANSWER IS B
Final answer:
Genetic engineering in medicine includes inserting genes into bacteria to produce needed medicines, using recombinant DNA technology. This innovation allows for the mass production of medical substances like insulin, hormones, and antibiotics. So the correct option is B.
Explanation:
Genetic engineering has a wide array of applications in various fields, including medicine and agriculture. One medical application of genetic engineering, as identified by option B, involves inserting genes into bacteria to produce medicine. This process is known as recombinant DNA technology, where genes are isolated, and then inserted into other organisms, like bacteria, which can then be grown in culture to produce useful substances like insulin, hormones, and antibiotics. Such methodologies have revolutionized the production of medicines, making previously scarce treatments widely available.
In the context of genetic engineering applications in agriculture, genomics can be used to improve crop yields, increase disease resistance, and generate new hybrid strains. However, the question specifically asked for a medical application, distinguishing it from agricultural uses.
If a solution conducts electricity, it it positive evidence that
its an electrolyte.. :D
calculate the pH of 100.0 mL of a 0.150M aqueous solution of HNO3
Final answer:
To calculate the pH of a 0.150M solution of HNO3, use the formula pH = -log([H+]), which gives a pH of approximately 0.823 since HNO3 is a strong acid and fully dissociates.
Explanation:
To calculate the pH of a 100.0 mL of a 0.150M aqueous solution of HNO3, we need to understand that is a strong acid and fully dissociates in water. This means that the concentration of hydrogen ions, [H+], in the solution will be equal to the concentration of the nitric acid, which is 0.150M. The pH is calculated using the formula pH = -log([H+]) where [H+] is the concentration of hydrogen ions.
Plugging the values into the formula, we get pH = -log(0.150). The pH calculation would result in a pH of approximately 0.823.