Answers
Answer:
Name: ScaleUsed for measure: Categorize and/or Quantify Variables
Measurement scales are used to categorize and/or quantify variables. This lesson describes the four scales of measurement that are commonly used in statistical analysis: nominal, ordinal, interval, and ratio scales.
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Based on meteorology conventions for describing wind direction, which one of the following statements is correct?
Group of answer choices
A valley breeze is a downslope wind.
An east wind blows toward the west.
Along the eastern slopes of the Rocky Mountains, an upslope wind is a west wind.
A sea breeze is an offshore wind.
Answers
Based on meteorology conventions for describing wind direction, the one of the statement that is correct is option D: A sea breeze is an offshore wind.
What is the meteorology conventions about?A sea breeze is a cooling wind that blows from the sea toward the land, often during the afternoon. It is caused by the cooling and densification of the air over the water, which causes it to flow inland.
Therefore, Sea breezes are common in coastal areas and are often strongest during the summer months, when the temperature difference between the land and sea is greatest. Sea breezes are typically offshore winds, meaning that they blow away from the shore.
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A team of furniture movers wishes to load a truck using a ramp from the ground to the rear of the truck. One of the movers claims that less work would be required to load the truck if the length of the ramp were increased, reducing the angle with respect to the horizontal. Is his claim valid? Explain.
Answers
Answer:
Yes, his claim is valid
Explanation:
mechanical advantage of an inclined plane = IMA = L/h
By lengthening L, you increase the IMA.
Also, IMA = Output force / Input force
Input force is less on a "shallow" inclined plane. Work = Fd, so if F is lower, Work is lower. The height (d) doesn't change, just the length of the ramp and the angle of the ramp.
Express 48 m/s in terms of
1.km/h
2.m/min
3.km/s
4.km/minutes
Answers
48 m/s in terms of km/h is 720.8 km/h. In terms of m/min is 2880 m/min, in terms of km/s is 0.048 km/s and in terms of km/min is 2.88 km/min.
To solve this question, we need to understand some terms. The unit of velocity is measured in m/s. It can be expressed in different units of velocity.
1 km (kilometer) = 1000 meter
1 h (hour) = 3600 seconds
1 minutes = 60 seconds
To convert m/s into km/h,
48 m/s * 3600/1000 = 172.8 km/h
To convert m/s into m/min,
48 m/s * 60 = 2880 m/min
To convert m/s into km/s,
48 m/s ÷ 1000 = 0.048 km/s
To convert m/s into km/minutes,
48 m/s * 60 / 1000 = 2.88 km/min
Therefore, the 48 m/s expressed is 172.8 km/h, 2880 m/min, 0.048 km/s and 2.88 km/min.
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48 m/s is equivalent to 172.8 km/h, 2880 m/min, 0.048 km/s, and 2.88 km/minute.
To express 48 m/s in different units of velocity:
km/h (kilometers per hour):
To convert m/s to km/h, we can use the conversion factor of 3.6 since 1 m/s is equal to 3.6 km/h.
48 m/s * (3.6 km/h / 1 m/s) = 172.8 km/h
Therefore, 48 m/s is equivalent to 172.8 km/h.
m/min (meters per minute):
To convert m/s to m/min, we can use the conversion factor of 60 since there are 60 seconds in a minute.
48 m/s * (60 m/min / 1 s) = 2880 m/min
Therefore, 48 m/s is equivalent to 2880 m/min.
km/s (kilometers per second):
Since 1 kilometer is equal to 1000 meters, to convert m/s to km/s, we divide the value by 1000.
48 m/s / 1000 = 0.048 km/s
Therefore, 48 m/s is equivalent to 0.048 km/s.
km/minute (kilometers per minute):
To convert m/s to km/minute, we first need to convert m/s to km/s (as calculated in the previous step) and then multiply by 60 to convert seconds to minutes.
0.048 km/s * 60 = 2.88 km/minute
So, 48 m/s is equivalent to 2.88 km/minute.
Hence, 48 m/s is equivalent to approximately 172.8 km/h, 2880 m/min, 0.048 km/s, and 2.88 km/minute.
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Joe takes his dog to the local dog park every morning, too. He walks with his dog 5 blocks south, 5 blocks west, and 5 blocks north in order to get to the park. What is his total displacement?
Answers
The total displacement of Joe from the starting point is 5 blocks to the west.
What is the total displacement of Joe?Displacement of a body or a person is the total distance travelled by the person in a specified direction.
Displacement is a vector quantity. Thus, in order to determine the displacement of a body, the total distances travelled are summed by vector addition.
The displacement of Joe is obtained by vector addition as follows:
Assuming the starting point is X
Distance travelled to the South = 5 blocks
Distance travelled to the West = 5 blocks
Distance travelled to the North = 5 blocks
The displacement from the starting point is 5 blocks to the west.
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Another group of students also wants try to identify an unknown
metallic substance by determining its specific heat capacity.
Identification of this substance is done by comparing the
experimentally determined specific heat capacity with an accepted
value from a table of specific heat capacities.
For each of the 12 trials, the measurements were used to calculate
individual specific heat values for the metal. The average specific
heat for these trials was 213.89- J
and the
kg.
standard deviation was 111.51 J
kg. C
Using Table 14.1 from the OpenStax College Physics textbook, identify
what material or materials this unknown substance could potentially
be. Remember that the 95% confidence interval is ±2Ax, where Ax
is the standard uncertainty. Select all that apply.
Answers
According to the question Aluminum Iron Copper Silver and Lead could potentially be.
What is Copper?Copper is a chemical element with the symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high electrical and thermal conductivity. It is a reddish-orange metal that occurs naturally in the environment and is found in many different minerals. Copper has been used by humans since ancient times, and was the first metal to be used by humans. It is considered a base metal, meaning that it is not especially rare or valuable. Copper is often used in many different areas, such as electrical wiring, plumbing, and cooking utensils. It is also used in construction and manufacturing, and is a key component in many alloys. Copper is highly corrosion resistant, making it an ideal material for many different uses. Copper is also believed to have some health benefits, as it is an essential trace mineral and can be found in many foods and supplements. Copper is an important part of a healthy diet and is essential for life.
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Explain why there are different colors of visible light. Due in a couple of minutes
Answers
Answer:
As the full spectrum of visible light travels through a prism, the wavelengths separate into the colors of the rainbow because each color is a different wavelength.
Explanation:
hop this helps
Answer:
Light is made up of different wavelengths, or colors, and white light is a combination of all of them. When a ray of white sunlight hits a patch of beach ball, the paint absorbs most of the wavelengths. It reflects the rest. For example, if the patch is blue, it reflects the blue wavelengths and absorbs all the others.
The noble gas neon is used for filling neon signs. Like other noble elements, it has a full octet (complete outer energy level) of electrons, which makes the gas A. freeze at room temperature. B. react with other gases in the air. C. unlikely to combine with other elements. D. solidify at standard pressure and temperature, chiny pray-colored solid at room
Answers
Answer:
C. unlikely to combine with other elements.
Explanation:
In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.
Noble gases are chemical elements with eight valence electrons and as such have a full octet. Some examples are argon, neon, etc.
Hence, the full octet makes the gas (neon) unlikely to combine with other elements.
Ryan hits a stationary 0.15 kg ball with a force that lasts for 0.08 s and makes the ball shoot across the ice with a speed of 17 m/s. With what force did Ryan hit the ball?
B
D
32 N
320 N
Cannot solve without acceleration
0.204 N
Answers
Answer:
\(\huge\boxed{\sf F=31.88 \ N}\)
Explanation:
Given Data:Mass = m = 0.15 kg
Velocity = v = 17 m/s
Time = t = 0.08 s
Required:Force = ?
Formula:\(\displaystyle F=\frac{mv}{t}\)
Solution:\(\displaystyle F=\frac{(0.15)(17)}{0.08} \\\\F=\frac{2.55}{0.08} \\\\F=31.88 \ N\\\\\rule[225]{225}{2}\)
what is the average of this set of data 5, 18, 8, 4, 10
Answers
answer:
9
Explanation:
add them all together then divide
Consider an extension of our Cobb-Douglas technology Y=AK
α
L
β
M
γ
where, in addition to the known variables, M is the amount of raw materials consumed in production. All parameters A,α,β,γ are strictly positive. What is the condition on the parameters that makes the technology constant returns to scale in K,L and M ? Increasing returns to scale? Hint: Observe that by setting γ=0, you will obtain the production function we used in class. Is your answer when you set γ=0 consistent with what we learned in class? Question 3.2 Consider the so-called constant elasticity of substitution (CES) technology Y=[aK
α
+bL
α
]
β
where a,b>0 and α and β are nonzero. What is the restriction on the parameters that makes the production function be constant returns to scale in K and L ?
Answers
The production function will have constant returns to scale if 2αβ = 1
Constant returns to scale (CRS) implies that if all inputs increase by a factor of λ, the output increases by λ as well. The requirement for constant returns to scale (CRS) in a Cobb-Douglas production function with a new input factor is given by the sum of exponents on all variables equal to 1.
In this case, Y = AKαLβMγ.
Thus, we have that α + β + γ = 1 for constant returns to scale in K, L, and M, because the sum of the exponents is 1.
If the sum of the exponents is less than 1, it indicates decreasing returns to scale. If the sum of the exponents is greater than 1, it indicates increasing returns to scale. If we take γ = 0, we obtain the production function used in class, which is Y = AKαLβ, thus α + β = 1 for constant returns to scale in K and L.
When γ = 0, the answer we get is consistent with what we learned in class. Now, we consider the constant elasticity of substitution (CES) technology, where Y = [aKα + bLα]β. The production function will have constant returns to scale (CRS) in K and L if the sum of the exponents of K and L is equal to 1.
Therefore, αβ + αβ = 1, implying 2αβ = 1.
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Can we get less ads please i don’t like this
Answers
Which two complementary forces keep the sun from blowing itself up?.
Answers
The two complementary forces that keep the sun from blowing itself up are gravity and nuclear fusion.
Gravity is the force that exists between any two masses, any two bodies, any two particles. It is the force that attracts a body towards the center of the Earth, or towards any other physical body with mass.
Nuclear fusion is the process by which two atomic nuclei join together to form a heavier nucleus. This process releases energy, as per the famous equation,
E = mc²,
where E is the energy released, m is the mass that gets converted to energy, and c is the speed of light. The sun and other stars release energy through nuclear fusion.
What is the role of gravity in keeping the sun from blowing itself up?Gravity is the force that attracts all the particles of matter together in the sun's core. It keeps the nuclear fuel together and squeezes the matter so tightly that the temperature and pressure in the core are sufficient to make nuclear fusion reactions occur.
What is the role of nuclear fusion in keeping the sun from blowing itself up?The energy released during nuclear fusion reactions in the sun's core is what keeps the sun shining and stable. The outward pressure from the energy released in nuclear fusion is balanced by the inward force of gravity. The sun stays in a stable equilibrium state where these two forces are balanced, preventing it from blowing itself apart.
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How do adaptations help an animal survive?
Answers
Answer: Depends on their adaptions such as they may be able to change their color of their skin to camouflage to hide from predators or they are able to survive in harsh weather where they live in.
Explanation:
Answer: An adaptation is a very particular skill which helps an animal do the things they do in every day life . Adaptation basically helps an animal survive in the environment they have decided to live in .
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Gold has a specific heat of 129 J/kg K. How much heat would be given off when 50 kg of gold cools from 323 kg to 293 kg?
Answers
Answer:
Explanation:
Q=m*c*ΔT
m=50 kG
C=129 j.kg^-1.k^-1
ΔT=323-293=30
now
Q=50*129*30=193500
A spring has a spring constant of 120 N/m. How much energy is stored in the spring as it is stretched a distance of 0.20 meter?
Answers
Answer:
2.4J
Explanation:
Given parameters:
Spring constant = 120N/m
Extension = 0.2m
Unknown:
Amount of energy = ?
Solution:
The energy stored in this stretched spring is called the elastic potential energy.
It can be derived using the expression below:
Elastic Potential energy = \(\frac{1}{2}\) ke²
k is the elastic constant
e is the extension
Insert the parameters;
Elastic potential energy = \(\frac{1}{2}\) x 120 x 0.2² = 2.4J
A car starts from rest , then accelerates at 1.20 m/s^2 fo 7.00 s. It hits the brakes, slowing to a stop at a rate of -4.25 m/s^2. What is the total distance travelled?
Answers
In the first 7.00 seconds, the car travels a distance of
1/2 (1.20 m/s²) (7.00 s)² = 29.4 m
and after this time it will have reached a speed of
(1.20 m/s²) (7.00 s) = 8.40 m/s
Afterwards, the car slows to a stop under uniform acceleration, so that
0² - (8.40 m/s)² = 2 (-4.25 m/s²) x
where x is the distance traveled in the time it takes for the vehicle to stop. Solve for x :
x = (8.40 m/s)² / (2 (4.25 m/s²)) ≈ 8.30 m
So, the total distance traveled is approximately 29.4 m + 8.30 m ≈ 37.7 m.
why pure acetic acid does not conduct electricity
Answers
Answer:
We know that the presence of the free ions are responsible for the conduction of electricity. It is a weak electrolyte hence does not produce many ions on dissociation. So, it does not conduct electricity.
I hope this helps
Answer:
It is a weak electrolyte hence does not produce many ions on dissociation. So, it does not conduct electricity.
what are the fundamental units used in physics?
Answers
Answer:
Metre, kilogram, second, ampere, kelvin, candela, and mole
Explanation:
A base unit (also referred to as a fundamental unit) is a unit adopted for measurement of a base quantity
A cannon ball is launched from the edge of a cliff that is 6 m above the ground. It has a
horizontal velocity of 10.2 m/s. It takes 3.7 s for the cannonball to reach the ground.
How far from the cliff does it land?
Record your answer to the nearest hundredth.
Answers
Answer:
Sh = Vh t horizontal distance traveled
Sh = 10.2 m/s * 3.7 s = 37.74 m
How are the angle of incidence and the angle of reflection related?
Answers
a train engine is pulling four boxcars, each of inertia m. the engine can exert a force of magnitude fon what it is pulling. assuming that friction can be ignored, what is the tension in each of the four couplers as the train starts off?
Answers
The tension in each of the four couplers as the train starts off is 3/4 of the force exerted by the engine.
The tension in each of the four couplers can be found using Newton's second law, which states that the net force on an object is equal to its mass times its acceleration.
In this case, the net force on each boxcar is equal to the force exerted by the engine minus the tension in the coupler, since the tension in the coupler is in the opposite direction of the force exerted by the engine.
Thus, the net force on each boxcar is given by:
Fnet = fon - T
where T is the tension in the coupler.
At the start, the train is accelerating, so we can use the formula for acceleration:
a = Fnet / (4m)
where 4m is the total mass of the four boxcars.
Substituting Fnet and solving for T, we get:
T = fon - (Fnet / 4)
T = fon - (fon / 4)
T = 3/4 fon
Therefore, the tension in each of the four couplers as the train starts off is 3/4 of the force exerted by the engine.
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An object appears red when viewed with white light. What color would it appear when viewed with blue light?
Answers
Answer:
Colour of any object is by the colour of light it reflects i.e if white light is incident on the object,it will reflect blue color.so it will appear blue.But if red light is incident on it,it will not reflect that and absorb it.so as it will not reflect any light it will appear black.
Explanation:
Photoelectric effect is observed on two metal surfaces.
Light of wavelength 300.0 nm is incident on a metal that has a work function of 2.80 eV. What is the maximum speed of the emitted electrons?
...m/s
Answers
Therefore, the maximum speed of the emitted electrons is 1.62 x 10⁶ m/s.
The photoelectric effect is observed on two metal surfaces. If light of wavelength 300.0 nm is incident on a metal that has a work function of 2.80 eV, the maximum speed of the emitted electrons is 1.62 x 10⁶ m/s. What is the photoelectric effect? The photoelectric effect, also known as the Hertz–Lenard effect, is a phenomenon in which electrons are emitted from a metal surface when light is shone on it. The photoelectric effect was initially studied by Heinrich Hertz in 1887 and later by Philipp Lenard in 1902.Latex-free answer: To calculate the maximum speed of emitted electrons using the photoelectric effect equation, we can use the following formula: KEmax = hν - φwhere KE max is the maximum kinetic energy of the ejected electron, h is Planck's constant, ν is the frequency of the incident light, and φ is the work function of the metal. Using the equation, we can convert the given wavelength of 300.0 nm to frequency by using the formula c = λν where c is the speed of light and λ is the wavelength. c = λνν = c/λν = (3.0 x 10⁸ m/s) / (300.0 x 10⁻⁹ m)ν = 1.0 x 10¹⁵ Hz, Now we can plug in the values in the equation: KE max = (6.626 x 10⁻³⁴ J s) (1.0 x 10¹⁵ Hz) - (2.80 eV)(1.60 x 10⁻¹⁹ J/eV)KE max = 1.06 x 10⁻¹⁹ J - 4.48 x 10⁻¹⁹ JKE max = -3.42 x 10⁻¹⁹ J. Since KE max is a positive value, we can convert the value to speed using the equation KE = 1/2mv² where m is the mass of the electron and v is the velocity of the electron: v = √(2KE/m)v = √[(2)(3.42 x 10⁻¹⁹ J)/(9.11 x 10⁻³¹ kg)]v = 1.62 x 10⁶ m/s. Therefore, the maximum speed of the emitted electrons is 1.62 x 10⁶ m/s.
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One Newton is equivalent to
A. 1 kg/s2
B. 1 kg*m/s
C. 1 kg*m/s2
D. 1 kg/s
Answers
Answer:
B
Explanation:
1. Pilihan ganda30 detik1 ptQ. For object A to have a higher absolute temperature than object B, which of the following must object A have?Pilihan jawabangreater specific heathigher average internal potential energygreater masshigher average internal kinetic energy
Answers
The correct answer is: object A must have a higher average internal kinetic energy than object B to have a higher absolute temperature.
To understand which of the given options would make object A have a higher absolute temperature than object B, we first need to understand what temperature is and how it is related to the properties of an object.
Temperature is a measure of the average internal kinetic energy of the particles in an object. The greater the average internal kinetic energy, the higher the temperature. So, to have a higher temperature than object B, object A must have a higher average internal kinetic energy.
Now let's consider the given options:
Greater specific heat: Specific heat is the amount of energy required to raise the temperature of a unit mass of a substance by one degree Celsius. Having a greater specific heat would not directly affect the temperature of an object, as it only determines how much energy is required to change its temperature.Higher average internal potential energy: Internal potential energy refers to the energy stored within an object due to the position and arrangement of its particles. While it is related to temperature, it is not the determining factor in an object's temperature.Greater mass: Mass is also not a determining factor in an object's temperature. While larger objects may require more energy to heat up or cool down, they do not necessarily have a higher temperature than smaller objects.Learn more about kinetic energy here:
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(HELP PLEASEE) An object is 40.0 cm from a
concave lens. It creates a virtual
image with magnification 0.450.
What is the image distance?
(Mind your minus signs.)
(Unit = cm)
Enter
Answers
Answer:
-18
Explanation:
acellus use the formula of magnification and watch your minus sign
Definition: The energy transferred by a force to a moving object.
Answers
Answer:
Force applied
Explanation:
An object will remain at its state of rest unless a non zero for act on it
How is the density of a fish controlled? how is the density of a submarine controlled?
Answers
The density of a fish is controlled by the expansion and contraction of its air sacs while the density of a submarine is controlled by ballast tanks. It was emphasized earlier that buoyant forces does not equal an objects weight but does equal the weight of displaced water.
What are mass, density, and volume ?The three most fundamental characteristics of an object are mass, volume, and density. Volume indicates something's size, mass indicates how heavy it is, and density is calculated as mass divided by volume. Although you deal with mass and volume on a daily basis, the concept of density is less clear-cut and requires careful consideration.
Mass divided by density equals volume; and. Volume times density equals mass. A liquid's density is a gauge of how heavy it is relative to the amount being measured. The liquid that weighs heavier is more dense if you weigh two liquids with similar volumes or amounts.
The relationship between a substance's mass and the amount of space it occupies is known as its density (volume). The density of a substance is determined by the mass, size, and arrangement of its atoms.
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The depth below the surface where the circular orbits become so small that movement is negligible is called the ________.
Answers
30 grams of KNO3 are added to 100 grams of water at 50 degrees celsius how many more grams will need to be added to make a saturated solution
Answers
We need more 50 g of KNO3
What is the solubility of KNO3 at 50 degrees Celsius?Solubility is the ability of a substance to dissolve in a solvent (usually a liquid) to form a homogeneous solution. It is a property of a substance and can be defined as the maximum amount of a substance that can dissolve in a given amount of solvent at a specified temperature and pressure.
The solubility of the KNO3 at this temperature is 80 g/100 g water. If we have already 3og of the solute then we need an extra 50 g to make a saturated solution.
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