We use the formula:
a = (v^2 - u^2)/2s
a = acceleration = ?
v = final velocity = 2.5x10^6
u = initial Velocity = 1x10^5
s = distance traveled. = 0.012m
To find the acceleration, we need to fill in the variables:
a = ((2.5x10^6)^2 - (1x10^5)^2)/ 2* 0.012 = 260,000,000,000,000 m/s^2
Our acceleration is 2.6 × 10^14 m/s^2
True or False? Facts and Figures are examples of variables? If it's false explain how you can fix it.
Compression waves move through liquid faster than solids. True or false?
Explain how the energy of a marble is transformed as it rolls down a ramp. Give evidence that energy of the marble remains the same at all points on the ramp.
Answer:
All the energy remains same actually.
Explanation: First, when it is dropped, it collects speed and kinetic energy, and also creates few amounts of sound and little thermal energy. For, example, you dropped the marble, and it rolled and bounced off towards the ramp. Take, it had 100 joules ( joule is the unit of energy, founded by scientist James Prescott Joule ). As it dropped, it created sound energy ( the clink sound ) and assume it had taken 50 joules. The rest are transformed to thermal and kinetic energy, assuming both energies took 25 joules. As it rolls down, it gains speed, gradually, and soon, it comes to halt in the ground by friction. Friction gives enough evidence as well as use of joules by sound, thermal and kinetic energies.
What would you most likely measure by immersing an object in water and seeing how much the water level rises
How many places are there for electrons in the second shell of an atom?
Answer:
Eight electrons.Explanation:
An atom is composed by shells, each shell can contain a limited number of electrons. The first one can contain two electrons. The second shell contains up to eight electrons. The third shell contains up to 18.
There's a formula to calculate the number of electrons:
[tex]2(n^{2} )[/tex]
leptons are made of quarks and antiquarks true or false ?
The relationship between the mass m of a material, its volume V, and its density D is
A. V= mD
B. Vm=D
C. DV=m
D. D+V=m
The relationship between the mass m of a material, its volume V, and its density D is DV = m
What is volume ?
Volume is a three dimensional space occupy by the body of particular shape. Generally expressed in cubic meter.
So, let V be the volume of body in cubic centimeters and
the mass of body is m than Density D of diamond is calculated as :
[tex]\begin{aligned}D&=\frac{m}{V}\\DV&=m \end{aligned}[/tex]
Therefore,The relationship between the mass m of a material, its volume V, and its density D is DV = m
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Factual data is always the best data because it is based on facts.
True
False
2.
You are trying to sell a new product to a store owner. Which method of presentation is likely the most effective?
a chart showing how sales will go up if they use this product
quotes from other store owners on success of this product
a free trial option to use the product for six months, no questions asked
all of these
3.
A presentation is always in front of a group of people.
True
False
4.
Humor should never be used in a presentation as it will distract your audience.
True
False
5.
Which of these words does not describe factual data?
observation
measurement
calculation
opinion
6.
It is always better to run over and give more information when you are giving a presentation versus quitting on time.
True
False
7.
In a newspaper advertisement for a hybrid car, which of these presentation methods would be most effective?
a chart showing the rising price of gas
a list of the most expensive gas stations in the city
a technical diagram of the hybrid engine and why it works
a quote from a famous actress on why she bought a hybrid
8.
During your research on a topic, you run across a blog site where several people posted that fuel prices have gone up 10% in the last six months. You can provide this data in your presentation as which of the following?
Gas prices have gone up 10% in the last six months.
People across the country are reporting that gas prices have gone up 10% in the last six months.
Typical of opinions across the country, users on blahblah-blog.com have mentioned that gas prices have gone up 10% in the last six months.
Although there are rumors about increased gas prices, there is no factual data.
9.
You use Webshots to create desktop slide shows for your personal screen saver. Your boss asks you to display your screen so that customers on the street can see your screen saver. What photos are fair game for this slide show?
any photo found on the Internet
any photo you take with a digital camera
any photo on wikipedia.org
any photo on Yahoo's "most viewed photos"
10.
In general, a presentation to kindergartners should be less abstract than a presentation to corporate executives.
True
False
The statement is true
Explanation:Factual data is the one that is based on facts and figures. It is not based on just observations; theories or personal interpretations. Factual Data also provides accurate risk evaluation with greater efficiency and it can be used in any situation or data collection method. It is a trusted and reliable source that can be used as evidence.
Answer to Q2.
The correct option is All of these
Explanation:In order to sell a new product to a store owner, taking the store owner into trust is the most important stage. We must provide proper details and the proofs that our product will make his business more effective. All of the above statements are part of the deal and they can be used to assure the store owner that the product we are selling to him is trustworthy.
Answer to Q3.
The statement is True
Explanation:A presentation can be defined as a speech or talk in which a new product, idea, or piece of work is shown and explained to an audience. So audience is important factor for presentation. Without an audience or people, the presentation is just like talking to oneself. Moreover, the objective of presentation is to motivate or persuade others therefore having audience Is necessary.
Answer to Q4.
The given statement is False
Explanation:Humor is a powerful communication tool. It can gain attention, create harmony, and make a presentation more memorable. It can also relieve tension, motivate an audience, and enhance the reputation of presenter if it’s used appropriately. Emotions are very important for an event so humor being a part of emotions can make a presentation more memorable and effective.
Answer to Q5.
The words that do not describe factual data are observation and opinion.
Explanation:As we know that factual data is based on facts and figures. It is not based on just observations, therefore observation and opinion based data cannot be considered as factual data. As the name suggests, factual data needs facts and facts are always calculated and measured. They cannot be created merely on the basis of observation or opinion. Experiment is necessary for factual data therefore opinion and observation are not a part of actual data.
Answer to Q 6.
The statement is True
Explanation:A presentation is given to convince people and persuade them for a certain cause. Therefore, authentic information and facts and figures should be provided to audience. Time killing and just talking to pass the time is not the proper way for presentation. If we just quit on time instead of giving authentic facts, then the audience get irritate and no more interested in the presentation.
Answer to Q 7.
The correct option is a chart showing the rising price of gas
Explanation:Conventional vehicles use gasoline or diesel to power an internal combustion engine but A hybrid car is the one that can use both a conventional engine and electric motor. The best hybrid cars achieve better fuel efficiency than their non-hybrid counterparts. The chart that shows the rising price of gas will be effective because it can make the customers realize that a hybrid car may save their money by using electric motor inside the car instead of using gas.
Answer to Q8.The correct answer should be Typical of opinions across the country, users on blahblah-blog.com have mentioned that gas prices have gone up 10% in the last six months.
Explanation:Any data in a presentation should be based on research and facts plus authentic figures and calculation that can be based on authentic source. So it means that a source is required to assure the audience about the reliability of data. If the presentation says that people across the country have xyz opinion but the source of that information is not given, then the information may be thought as false or incorrect therefore the blog website must be provided to make the arguments stronger.
Answer to Q9.
The correct option is any photo you take with a digital camera
Explanation:The question says that the boss is asking to present own screen so to represent own screen one must show own photos taken by personal camera. These photos must be the same that are taken by personal digital camera. Photos taken from internet or any other source cannot be taken into consideration for own presentation. Personal digital camera photos make more impression on audience because they represent reality.
Answer to Q 10.The given statement is True
Explanation:The mental level and cognitive approach of kindergarten kids is very different from mature and aged people. Children in younger age cannot understand abstract images or presentation because their social life exposure and mental level is not well adequate. Therefore there must be a difference between the presentation presented to kindergarten kids and corporate executives.
NEED HELP ASAP IF I FAIL THIS ONE I GET A F
If you want to cause an object to move, what should you do?
a Apply balanced forces.
b Apply neutral forces.
c Apply potential forces.
d Apply unbalanced forces.
Suppose you that you are facing a straight current carring conductor and the current is flowing toward you. The line
of magnetic force at any point in the magnetic field will act in
summarize the steps you might use to carry out an investigation using scientific methods
The steps involved in the scientific method are;
Draw up a research questionConstruct a hypothesisTest the hypothesis through experimentsAnalyse experimental resultsDraw conclusionsScience is a study of the universe from an empirical point of view. This means that scientific investigations depend on experiments.
The first step in the scientific method of investigation is to draw up the research questions to be investigated. After this is done, a research hypothesis is constructed and subjected to experiments. The experiments may confirm or disprove the hypothesis. If the hypothesis is disproved, then it is revised in line with the results of experiments.
However, if the hypothesis is confirmed after analysis of experimental results, then relevant conclusions can be drawn.
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A car is driven 80 km west and then 30 km south. What is the displacement of the car?
Final answer:
The displacement of the car is approximately 85.44 km, in a direction 20.56° south of west. This is calculated using the Pythagorean theorem and the arctan function to combine the westward and southward components of the car's journey.
Explanation:
To calculate the displacement of the car, we need to treat this problem as a vector addition question. The car's motion creates a right-angled triangle with a base of 80 km to the west and a height of 30 km to the south. To find the magnitude of the car's displacement, we use the Pythagorean theorem:
Displacement (magnitude) = √(base² + height²)
= √(80² + 30²)
= √(6400 + 900)
= √7300
= approx 85.44 km
To specify the direction of the displacement, we can calculate the angle θ using the arctan function, where θ is the angle the resultant displacement vector makes with the negative x-axis (since west is the negative x-direction). This is not directly asked for, but just to complete the vector characterization:
θ = arctan(height/base)
= arctan(30/80)
= arctan(0.375)
= approx 20.56° south of west.
Therefore, the car's displacement is approximately 85.44 km, 20.56° south of west.
In which organelle does photosynthesis take place
In which organelle does photosynthesis take place
chloroplast
Which two characteristics of data always occur together?
Which of the following is a characteristic of science?'
The answer is:
Science is a process of gaining new knowledge.
Answer:
It uses data and observations to make conclusions.
Explanation:
Our understanding of the Atom has changed over time. which idea that was once accepted is now considered scientifically inaccurate
Answer:
Explained
Explanation:
From Rutherford's alpha ray scattering experiment, we know that most of the spaces in an atom is empty. It is so because most of the alpha particles in that scattering experiment had gone Undeviated without any deflection from the positively charged nucleus.
Hence, atom can not be considered as a compact solid sphere, which was once considered by the J.J. Thomson.
Physics HELP!!!!! On the surface of the Moon an astronaut has a weight of Fg = 140 N. The radius of the Moon is Rm = 1.74 x 106 m, the gravitational constant is G = 6.67 x 10-11 N m2kg2 and the mass of the Moon is Mm = 7.35 x 1022 kg. Solve numerically for the mass of the astronaut ma in kg.
Answer:
Mass of the astronaut is 86.45 kg
Explanation:
It is given that,
Weight on the surface of astronaut, [tex]F_g=140\ N[/tex]
The radius of the moon is, [tex]R_m=1.74\times 10^6\ m[/tex]
The gravitational constant is, [tex]G=6.67\times 10^{-11}\ Nm^2/kg^2[/tex]
Mass of the moon, [tex]m_1=7.35\times 10^{22}\ kg[/tex]
We need to find the mass of the astronaut. It can be calculated using the formula as :
[tex]F=G\dfrac{m_1m_2}{R^2}[/tex]
m₂ = mass of the astronaut
[tex]m_2=\dfrac{FR^2}{Gm_1}[/tex]
[tex]m_2=\dfrac{140\ N\times (1.74\times 10^6\ m)^2}{6.67\times 10^{-11}\ Nm^2/kg^2\times 7.35\times 10^{22}\ kg}[/tex]
m₂ = 86.45 kg
So, the mass of the astronaut is 86.45 kg. Hence, this is the required solution.
The astronaut's mass is determined to be approximately 86.42 kg.
Let's begin by using Newton's law of universal gravitation, which states that the force of gravity between two masses is given by:
F = G * (m1 * m2) / r²
Where:
F is the gravitational forceG is the gravitational constant, 6.67 x 10⁻¹¹ N·m²/kg²m1 and m2 are the masses of the objectsr is the distance between the centers of the two masses (radius of the Moon in this case)Given data:
The astronaut's weight (Fg) on the Moon: 140 NThe radius of the Moon (Rm): 1.74 x 10⁶ mThe mass of the Moon (Mm): 7.35 x 10²² kgFirstly, we calculate the acceleration due to gravity on the Moon (gm) using the formula:
gm = G * Mm / Rm²
Substituting the given values:
gm = (6.67 x 10⁻¹¹ N·m²/kg²) * (7.35 x 10²² kg) / (1.74 x 10⁶ m)²
gm ≈ 1.62 m/s²
Now, we know that weight (Fg) is given by Fg = ma * gm, where ma is the mass of the astronaut. Rearranging the equation to solve for ma:
ma = Fg / gm
Substituting known values:
ma = 140 N / 1.62 m/s²
ma ≈ 86.42 kg
Therefore, the mass of the astronaut on the Moon is approximately 86.42 kg.
Starting from rest, a runner at a track meet reaches a speed of 7.5 m/s in 1.7 s. How far does she run during this time, assuming her acceleration is uniform?
Final answer:
The runner covers a total distance of 1.445 meters during the acceleration phase and maintains a constant speed afterward.
Explanation:
To find the distance covered by the runner during the acceleration phase, we can use the equation: d = (1/2) * a * t^2. Substituting the values, we have: d = (0.5) * 1.7 * 1.7 = 1.445 m. Therefore, the runner covers 1.445 meters during the acceleration. To find the total distance covered, we add the distance covered during acceleration to the distance covered at constant speed. Given that distance = speed * time, the total distance covered will be 1.445 m + 7.5 m/s * (1.7 s - 1.7 s) = 1.445 m. Hence, the total distance covered by the runner during this time is 1.445 meters.
A airplane travels 3260 kilometers in 4 hours. What is the airplane average speed?
As a wave travels through a medium, it displaces particles in a direction parallel to the motion of the wave. We can conclude this is a
Answer:longitudinal wave
Explanation:. A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves.
Measurement of angle EGB
A power drill runs at a voltage of 120 V and draws a current of 4 A. What is the wattage of the drill?
Why is theory of evolution a theory
The theory of evolution is a well-supported and foundational scientific explanation for the diversity of life, subject to rigorous testing and not just an unsupported guess. The scientific usage of the term 'theory' differs greatly from the common everyday usage, lending significant credibility to evolutionary theory.
Explanation:The theory of evolution is a foundational scientific explanation that describes the mechanisms by which species change over time. In science, the term theory refers to a body of thoroughly tested and verified explanations, not just a simple guess as often misconstrued in everyday language. Evolutionary theory is as factual and substantiated as other scientific theories like the atomic theory of matter or the germ theory of disease. As with all scientific theories, it is subject to continued testing and revision, but this is a rigorous process that only strengthens the body of evidence supporting the theory. Therefore, the assertion that evolution is just a 'theory' in the sense of being an unsupported guess is a significant misinterpretation of the scientific meaning of a theory.
The theory of evolution has undergone extensive scrutiny and has been supported by a multitude of observations and experimental evidence, which makes it a reliable account of the natural world and not merely a 'just a theory.' The misconception that evolution is widely debated or controversial among scientists is incorrect, as the majority of the scientific community accepts evolution as the unifying theory of biology. Evolution provides the explanatory framework within which biologists approach all questions about the living world, and its understanding continues to evolve and refine as new evidence emerges.
how many significant digits does 36.33 have
what creates an electric force field that moves electrons through a circuit ?
a. energy source
b. load
c. metal wires
d. resistance
Answer:
a. energy source
Explanation:
In a circuit, there is cell or battery. This is the energy source. The battery creates an electric force field which causes electrons to move through the circuit. The current moves from positive terminal to negative terminal of the battery.
Resistance opposes the current in the circuit. load is same as resistance. Metal wires are used to connect different components of a circuit.
Answer:
A is the correct answer!!
Explanation:
Have a great day :^)
What profession is most likely to make use of amphoras and candelas
Final answer:
The profession most likely to make use of amphoras and candelas is an archaeologist or historian.
Explanation:
The profession most likely to make use of amphoras and candelas is an archaeologist or historian.
Amphoras were large vessels used for shipping liquid goods in the Mediterranean world. They were essential for trade, transportation, and storage. Historians study past civilizations, including their economies and trade networks, and archaeologists excavate ancient sites, including tombs and graves, where they may find artifacts like amphoras.
Candelas, on the other hand, are units of luminous intensity used in lighting design and engineering. This profession may involve designing and using light fixtures, such as candelabras, which are candle holders that can provide both functional and aesthetic lighting.
Devise a memory device that could help you remember the 4 problem- solving steps. Describe the memory device
The acronym 'IDEA' can serve as a mnemonic device for the four problem-solving steps: Identify, Develop, Execute, Assess. This tool aids memory by encoding larger bits of information into easily remembered forms.
Explanation:A useful memory device to remember the four problem-solving steps could be the acronym 'IDEA': Identify the problem, Develop a plan, Execute the plan, and Assess the results. This mnemonic device places the problem-solving steps into a memorable word that can easily be retained in long-term memory. Mnemonic devices like this are powerful tools, aiding in the encoding of larger bits of information such as steps or stages. This enables easier recall of the steps when problem-solving tasks are performed.
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Aluminum is used to make airplanes. Cast iron is used to make weight lifting equipment. Explain why the densities of these metals make them useful for these purposes?
Aluminum is light, tough, and corrosion-resistant, making it ideal for aircraft construction. In contrast, the high density and rigidity of cast iron make it suitable for the manufacture of weight-lifting equipment. The densities of these metals heavily influence their applications.
Explanation:The densities of both aluminum and cast iron play crucial roles in their respective applications. Aluminum, used in airplane construction, is known for its lightness, toughness, and resistance to corrosion which reduces the overall weight of the aircraft while maintaining structural integrity, an important factor in aerospace design.
On the other hand, cast iron, used in the manufacture of weight lifting equipment, has a much higher density than aluminum. This makes it ideal for producing heavy, sturdy equipment that is resistant to deformation, even under significant stress. Cast iron's high rigidity allows it to handle the force exerted during weightlifting.
Overall, it's the properties derived from these metals' densities that make them suitable for their distinct applications - the lightness of aluminum for flight efficiency in aviation and the weights possible from high-density cast iron in fitness.
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PLEASE HELP!
There are 10 players playing tug of war that can exert 1000 N force. The first two largest players can both exert 400 N force and the last two smallest players can give the total of 30 N force. Find the total force of the other 6 players can exert.
The total force the other 6 players can exert in a tug-of-war game is calculated by subtracting the forces exerted by the largest and smallest players from the total force. The total force available from the other 6 players is 170 N.
Explanation:To find the total force the other 6 players in a game of tug-of-war can exert, we need to know the total force of all 10 players and subtract the force exerted by the largest and smallest players. We're given that 10 players can exert a total force of 1000 N. The first two largest players exert a force of 400 N each, totaling 800 N for both. The last two smallest players exert a combined force of 30 N. To find the force exerted by the other 6 players, we subtract the sum of the forces exerted by the largest and smallest players from the total force.
Therefore, the calculation would be: 1000 N - (2 * 400 N + 30 N) = 1000 N - 830 N = 170 N.
To conclude, the other 6 players can exert a force of 170 N in total.
How can density be used to help identify a substance?
Final answer:
Density is a physical characteristic of matter that can be used to identify substances. By comparing the density of an unknown substance to known density values, you can make reasonable guesses about its identity. Additional information may be needed to identify substances in objects composed of more than one material.
Explanation:
Density is a physical characteristic of matter that can be used to identify substances. Each substance has a characteristic density that can be used as a hint in identifying it. For example, gold has a density that is about 2.5 times the density of iron, which is about 2.5 times the density of aluminum. By comparing the density of an unknown substance to known density values, you can make reasonable guesses about the identity of the substance.
In some cases, additional information may be needed to identify the substances in an object composed of more than one material. For example, if a mixture has different materials with similar densities, it may be necessary to perform additional tests, such as chemical reactions or spectroscopy, to determine the exact composition of the mixture.