A peer-reviewed article about the effectiveness of the motor oil is most likely to provide the most reliable scientific information about a new kind of motor oil. So, option D.
What is meant by motor oil ?Motor oil is a lubricant used in the moving parts of a engines, vehicles and other machines.
Engines have moving parts that rub against one another, wasting heat instead of kinetic energy that would otherwise be beneficial. Furthermore, it degrades those components, which can cause the engine to run less efficiently and become less reliable.
In addition to extending the life of engines, proper lubrication reduces fuel use and wasted power.
In order to prevent direct contact between surfaces of adjacent moving parts, lubricating oil forms a separating layer between them. This minimizes frictional heat generation and wear, safeguarding the engine. When in use, motor oil conducts heat as it moves through the engine. This heat is transported through airflow over the external surface of the oil pan, airflow through an oil cooler, and through oil gases expelled by the positive crankcase ventilation (PCV) system in an engine with a recirculating oil pump.
Peer-reviewed journals and books are regarded as the most dependable sources and are frequently a great resource for finding reliable and scientific content.
Hence,
A peer-reviewed article about the effectiveness of the motor oil is most likely to provide the most reliable scientific information about a new kind of motor oil.
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What unit messures amplitude?
Hi there! Hopefully this helps!
-------------------------------------------------------------------------------------------------
The SI system of amplitude is a metre (m).
Which kind of body is the largest?
1. asteroids
2. comets
3. meteoroids
4. all are the same size
Answer: ( A ) - asteriods
Explanation: because most asteriods are in the asteriods belt , and the largest asteroid in Ceres , which is 583 miles across , still holding the record .
Asteroids refer to the type of body which is the largest in this scenario and is denoted as option 1.
What is an Asteroid?These are rocky objects which orbit the sun and are smaller which is why they aren't referred to as planets.
They are however bigger than the meteoroids and comets which makes it the most appropriate choice.
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Think about the motion of a roller coaster car, after completing a trip around the track
the car's displacement is ______
a. The length of the pathway the roller coaster car traveled.
b. The starting point minus the finishing point
с. Zero
d. Half the distance because of vector addition
Answer:
it should be B let me know if i am wrong
Explanation:
In which situations is heat flow present? Check all that apply.
A substance feels warm.
One substance does not have a temperature.
Two substances have the same temperature.
One substance transfers some of its thermal energy to another substance.
Two substances differ in temperature.
Answer:
A. A substance feels warm.
D. One substance transfers some of its thermal energy to another substance.
E. Two substances differ in temperature.
Explanation:
The change of motion of an object depends on ___
A. Both the mass of the object and the size of the force
B. Only the size of the
force on the object
C. Only the weight of the object and the size of the object
D. Only the mass of the object
The change in motion of an object is influenced by both the mass of the object and the size of the force applied to it, as per Newton's second law of motion.
Explanation:The change in motion of an object, also known as acceleration, is dictated by Newton's second law of motion. According to this law, the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to its mass. Therefore, the correct answer is A) Both the mass of the object and the size of the force. The quantity of the force applied and the mass of the object are both crucial factors that determine the change in an object's motion.
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What happens to a wave when reflected off a node
Will there be noise cancellation in example A or
example B?
Answer:
b
Explanation:
Yes, there is a noise cancellation in example B.
What is noise cancellation?
Active noise control, also known as noise cancellation or active noise reduction, is a method of reducing unwanted sound by adding a second sound designed specifically to cancel the first.
Active noise cancellation employs more advanced technology to actively combat noise. Essentially, it detects and analyzes the sound pattern of incoming noise before producing a mirror "anti-noise" signal to cancel it out. As a result, you hear a significantly reduced level of noise.
As we understood that the unwanted noise is cancelled by the second sound wave which reduces or cancels the unwanted sound wave. Example B is showing that the other wave is cancelling the noise and making the sound more noise free.
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Which observer would hear the louder sound?
a. The woman
C. They both do
b. The man
Answer:
B
Explanation:
the answer is b because the man has a deeper voice than the womans high pitched voice
If five 0.1ohm resistors are connected in parallel, the effective resistance is
Answer:
Effective resistance:
Rp = r/5 = 0.1/5 =0.02Ω
Explanation:
When the resistances are connected in parallel, the effective resistance becomes less than the smallest individual resistance. Thus smallest resistance is obtained when five0.1Ω resistors are connected in parallel.
What might happen if transformers didn't exist?
Electricity could not be distributed through power lines to people's homes
The electricity in your house might have an extremely high voltage
The direction of the electric current in your home might switch back and forth
Electricity could not be created at power plants
Answer:
The electricity in your house might have an extremely high voltage
Explanation:
To travel efficitenly elelectricty needs to be at a high voltage and transformers take it town to a resonable level.
A 2000 kg boat drifts along the waves at a velocity of 3 m/s. What is the kinetic energy of the boat?
9000 J
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightPhysics
SI Units
Energy is in Joules J = 1 Newton per meter N/mMass m is in kilograms (kg)Velocity v is in meters per second m/sEnergy
Kinetic Energy Formula: [tex]\displaystyle KE = \frac{1}{2}mv^2[/tex]
m is massv is velocityKE is kinetic energyExplanation:Step 1: Define
m = 2000 kg
v = 3 m/s
Step 2: Find KE
Substitute [KEF]: [tex]\displaystyle KE = \frac{1}{2}(2000)(3)^2[/tex]Exponents: [tex]\displaystyle KE = \frac{1}{2}(2000)(9)[/tex]Multiply: [tex]\displaystyle KE = (1000)(9)[/tex]Multiply: [tex]\displaystyle KE = 9000[/tex]Climate and weather are related but different. Which of the following describes the climate of a place?
Group of answer choices
Thunderstorms frequently occur in the summer
Fertile soil makes farms in the region very productive.
The temperature dropped below freezing every night last week.
A meteorologist predicts that tomorrow will be sunny and warm.
Climate. What does it mean?
Climate is a long-term weather, or recurring every time. Examples of climate? Every day, the desert is hot the day and cold in the night. This won't change, at least for hundreds, thousands, millions of years. This is climate.
Weather. What does it mean?
Weather is short-term, usually not recurring every time. Examples of weather? Today is very sunny. This will change-for all we know, tomorrow will be cloudy and rainy!
This is why your answer will NOT be a meteorologist predicts that tomorrow will be sunny and warm. This is weather, because it is only tomorrow.
This is why your answer will NOT be fertile soil makes farms in the region very productive. This does not relate to weather, or climate.
This is why your answer will NOT be the temperature dropped below freezing every night last week. This will only be "last week", not the week right now or the week after this week.
Therefore, your answer is "Thunderstorms frequently occur in the summer. This is because that's the climate in that part- thunderstorms always happen.
Brainliest?
Climate refers to long-term weather patterns and conditions experienced in a location. Thunderstorms occurring in the summer and fertile soil making farms productive are not climate indicators. However, dropping temperatures below freezing every night indicates a cold climate, while a sunny and warm prediction suggests a hot climate.
Explanation:The climate of a place refers to the long-term weather patterns and conditions experienced in that location. It is characterized by factors such as temperature, precipitation, humidity, and wind patterns. Of the given options, thunderstorms frequently occur in the summer is more indicative of the weather, rather than the climate. In contrast, fertile soil making farms in the region very productive is not directly related to climate but rather to a region's agricultural potential. However, the temperature dropped below freezing every night last week describes a cold climate, while a meteorologist predicting that tomorrow will be sunny and warm suggests a hot climate.
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Humans start from a single cell. Eventually, as cells divide, they start to differentiate, or specialize. Some cells are specialized for movement of the human body. What type cells would these be?
Answer:
interphase im sure
Explanation:
How can you tell the difference between chemical sedimentary rocks and intrusive
igneous rocks?
Answer:
Sedimentary rocks are usually formed under water when grains of broken rocks are glued together while igneous rocks form when melted rock (magma or lava) cools and metamorphic are rocks that once were igneous or sedimentary rocks but have been changed by pressure and temperature.
Igneous rock is formed by the cooling of magma (molten rock) inside the Earth or on the surface. Sedimentary rocks are formed from the products of weathering by cementation or precipitation on the Earth's surface. Metamorphic rocks are formed by temperature and pressure changes inside the Earth.
Here is a graph of speed vs time. If the object is moving to the east, which BEST describes the speed and velocity of the graph?
Answer: it's A hope this helps
Explanation:
how much thermal energy is absorbed by a copper water pipe with a mass of 2.3kg when its temperature is raised from 20.0 to 80.0?
Explanation:
q = mCΔt
q = (2.3 kg) (385 J/kg/K) (80.0°C − 20.0°C)
q ≈ 53,000 J
q ≈ 53 kJ
The thermal energy absorbed by 2.3 kg copper wire when its temperature raises from 20 to 80 degree Celsius is 53.13 J.
What is specific heat capacity?The specific heat capacity of substance is the heat energy required to raise its temperature by one degree Celsius per one gram. The specific heat capacity of metallic copper is 0.385 J/ °C g.
The calorimetric equation relating the heat energy q with the mass m, temperature difference ΔT and specific heat c is given by :
q = m c ΔT.
Given the mass of the copper wire = 2.3 Kg
temperature difference ΔT = 80 -20 = 60 °C.
specific heat of copper = 0.385 J/ °C g
q = 2.3 Kg × 0.385 J/ °C g × 60 °C
= 53.13 J
Therefore, the thermal energy required for the copper wire to raise its temperature is 53.13 J.
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which of the following is a disadvantage to asexual reproduction?
A. requires two different parents so not all the organisms Will be able to reproduce due to competition.
B. requires a lot of energy and therefore produces small numbers of organisms.
C. does not require much energy and therefore produces many offspring.
D. no genetic diversity mean organisms are vulnerable to disease and environmental changes.
When a 5 kilogram mass is
raised vertically
2 meters from the ground, what is its gain in potential energy?
Answer:If a 5-kilogram mass is raised vertically 2 meters from the surface of the Earth, its gain in potential energy is approximately 1) 0 J 2) 10 J 3) 20 J 4) 100 J 43.
Explanation:
The gain of potential energy of the object is 980 joule.
What is potential energy?Potential energy is the energy held by an object as a result of its position relative to other objects, internal stresses, electric charge, or other factors.
The gravitational potential energy of an object, the elastic potential energy of an extended spring, and the electric potential energy of an electric charge in an electric field are all examples of common types of potential energy. The joule, denoted by the symbol J, is the unit of energy in the International System of Units (SI).
Mass of the object: M = 5 kilogram
Vertical distance raised: h = 2 meter.
Acceleration of the gravity: g = 9.8 m/s ².
Hence, its gain in potential energy = Mgh
= 5 kilogram × 2 meter × 9.8 m/s²
= 980 Joule.
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a mountain climber weighs 42.0 N. If he climbs a hill 100m high. Calculate the work done in joules
Answer:
The answer is 4200 J.
Explanation:
The formula of work done is, W = F×D where F is the force of an object and D is the distance. Then you just substitute the values into the equation :
W = F×D
F = 42N
D = 100m
W = 42 × 100
= 4200 J
The work done by the mountain climber who weighs 42.0 N and climbs a hill 100 meters high is 4200 joules, calculated using the formula for work done W = Fd.
The student's question relates to the concept of work done, which is a topic in Physics. To calculate work done, you can use the formula W = Fd, where W is work, F is force, and d is displacement (in the direction of force). In this case, the displacement would be the vertical height the mountain climber ascends, which is 100 meters.
The force is the weight of the mountain climber, which is given as 42.0 N. Applying the formula W = Fd, we get W = 42.0 N * 100 m, which equals 4200 joules. This represents the gravitational work done by the climber as he elevates himself against the pull of gravity over a vertical distance of 100 meters.
What is the voltage drop across the 20.0 resistor?
A. 1.50 V
B. 20.0 V
C. 30.0 V
D. 90.0 V
Answer: B i did a test
The voltage drop across the 20.0-ohm resistor is 30 V. Correct Option is 3.
When resistors are connected in series, the total resistance (R_total) is the sum of individual resistances. In this case, the total resistance is:
R_total = 60 ohm + 20 ohm = 80 ohm
According to Ohm's law, the voltage drop across a resistor is proportional to its resistance. Therefore, the voltage drop across the 20.0-ohm resistor can be calculated using the ratio of its resistance to the total resistance, multiplied by the total voltage.
Voltage drop across the 20.0-ohm resistor:
V_drop = (Resistance of the 20.0-ohm resistor / Total resistance) * Total voltage
V_drop = (20 ohm / 80 ohm) * 120 V
V_drop = (1/4) * 120 V
V_drop = 30 V
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A cannon fires a cannonball. Explain how the cannonball gains kinetic energy.
A. The sound of the explosion propels the cannonball.
B. The thermal energy of the explosion propels the cannonball.
C. The chemical energy of the explosives transforms into kinetic energy.
D. The electrical potential energy of the explosives transforms into kinetic energy.
Answer:
C
Explanation:
I would try c but i'm not 100% positive
Answer:
c
Explanation:
its C because energy cant be destroy nor created its just can be transfer in a way such as the chemical solution that release energy to propel the cannonball thus the kinetic energy (movement)
How is photon energy calculated? (choose 2)
o Using Plank's constant.
o It cannot be calculated.
o Using the frequency.
What is indicated by the slope of an acceleration vs. time graph?
Answer: The velocity of an object
Explanation: The slope of an acceleration vs. time graph is also the velocity of the object.
Which of the following are steps of the inquiry process?
The steps of the inquiry process in historical inquiry are: developing questions, analyzing sources, developing evidence, and constructing claims.
Explanation:The steps of the inquiry process in historical inquiry are as follows:
Develop compelling and supporting questions that guide the inquiry process.Locate and analyze historical primary and secondary sources.Analyze the historical sources to develop historical evidence.Construct claims about the past, also known as historical interpretations, based on the evidence.These steps allow historians to engage in the process of historical inquiry and gain a comprehensive understanding of the past.
Roshan makes the table below to describe how to draw a ray diagram for a convex lens.
What error did Roshan make?
The ray that goes through the center should bend and go through the focal point on the other side.
The ray that starts out parallel with the main axis should bend toward the axis and go through the focal point on the other side.
The ray that goes parallel to the main axis after passing through the lens should also be parallel from the object to the lens.
The rays in the table describe how rays are drawn for a concave lens rather than for a convex lens.
The error that Roshan made is: the rays in the table describe how rays are drawn for a concave lens rather than for a convex lens.
What is lens?A lens is an optical device that is used to focus or diverge light rays through refraction. It is made up of a transparent material, such as glass or plastic, with at least one curved surface.
Roshan's table contained an error because he described the ray diagram for a concave lens rather than a convex lens.
A concave lens's ray diagram differs from that of a convex lens because the concave lens diverges light while the convex lens converges light.
After passing through the lens, the ray should be parallel to the main axis from the object to the lens. This is due to the law of refraction, which states that the incident angle equals the refracted angle.
Thus, Roshan's error was describing the ray diagram for a concave lens rather than a convex lens.
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Roshan's error was in stating that a ray passing through the center of a convex lens should bend and go through the focal point on the other side, which is incorrect as such rays do not change direction.
Roshan's error in describing how to draw a ray diagram for a convex lens is in the statement that 'The ray that goes through the center should bend and go through the focal point on the other side.' In fact, rays that pass through the center of a convex (converging) lens continue in a straight line without bending. The correct rules are:
A ray entering a converging lens parallel to its axis passes through the focal point F of the lens on the other side.A ray passing through the center of either a converging or a diverging lens does not change direction.Therefore, the correct statements for a convex lens would be that a ray that starts out parallel with the main axis should bend toward the axis and go through the focal point on the other side, and that the ray passing through the center of the lens should not deviate from its path.
How would a small bar magnet be oriented when placed at position X
Answer:
D
Explanation:
Well opposites attract, don't they?
A bar magnet at position X will align according to external magnetic fields, typically aligning its north pole towards the geographic North Pole. When experimenting with two magnets, opposite poles attract while like poles repel, which can be visualized with iron filings arranging along a magnetic field.
When a small bar magnet is placed at position X, its orientation will be determined by the external magnetic fields present. If there is no significant external field other than the Earth's magnetic field, a freely suspended bar magnet would align with the Earth's magnetic field lines, where one pole (north-seeking) faces the geographic North Pole and the south-seeking pole faces the geographic South Pole.
However, if we follow instructions similar to those given—placing one bar magnet on the table and bringing the north end of another bar magnet close to the south end of the first, we expect to see attraction between the opposite poles. Conversely, if two like poles are brought close together, they will repel each other. These interactions are due to the magnetic field lines that emerge from the north pole of a magnet and enter at the south pole.
Bar Magnet and Magnetic Field Lines: Utilizing iron filings around bar magnets can visualize these lines. The filings align with the magnetic field, showing the typical dipole pattern. When two bar magnets are placed with the same poles facing each other, the filings will show a pattern indicating repulsion, with field lines diverging. In contrast, when opposite poles are near each other, filings will align to show attraction, with field lines converging.
51. Which two of the resistor arrangements below
have the same equivalent resistance?
112
192
NM
802
812
232
2.2
N
.
W
212
(1) A and B
(2) B and C
(3) C and D
(4) D and A
Answer:
(2) B and C
Explanation:
In B resistors are parallel
so
1/R = 1/R1 + 1/R2
= 1/8+1/8
= 2/8
so
R = 4 ohms
In C resistors are in series
so,
R= R1+R2
= 2+2
= 4
The two resistors with the same equivalent resistance are B and C. So, option 2 is correct.
What is meant by series resistance circuit ?A series resistance circuit is defined as the circuit in which two or more resistances are connected in such a way that the current flowing through all the resistors are the same.
Here,
Two series resistance circuits and two parallel resistance circuits are given.
Calculating the equivalent resistance in each of them.
A) It is a series resistance
R₁ = R₂ = R = 1 Ω
Effective resistance, Reff = R₁ + R₂ = 2R
Reff = 1 + 1
Reff = 2 Ω
B) Parallel resistance circuit
R₁ = R₂ = R = 8 Ω
Effective resistance, Reff = R₁R₂/(R₁ + R₂)
Reff = R/2 = 8/2
Reff = 4 Ω
C) Series resistance circuit
R₁ = R₂ = R = 2 Ω
Reff = 2R = 2 x 2
Reff = 4 Ω
D) Parallel resistance circuit
R₁ = R₂ = R = 2 Ω
Reff = R/2 = 2/2
Reff = 1 Ω
Hence,
The two resistors with the same equivalent resistance are B and C.
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What are some indicators that a chemical reaction is occurring? Check all that apply.
the formation of bubbles
a change in size
a change in color
the formation of a liquid
the formation of a precipitate
Answer:
the formation of bubbles
a change in color
the formation of a precipitate
Explanation:
Answer:
>the formation of bubbles
>a change in color
> the formation of a precipitate
What type of wave is this
Answer:Longitudinal wave/compression wave
Explanation:?
A ray of light traveling in air strikes a flat 2.00 cm thick block of glass (n = 1.50) at an angle of 19.0 ◦ with the normal.?
a) Trace the light ray through the glass, and find the angle of refraction for light passing from air to glass. Answer in units of ◦.
b) Find the angle of refraction for light passing from glass to air. Answer in units of ◦.
Answer:
(a). [tex]\theta_2 = 12.5^o[/tex]
(b). [tex]\theta_1 = 19.0^o[/tex]
Explanation:
(a).
Snell's law says
[tex]n_1sin(\theta_1) = n_2sin(\theta_2)[/tex]
which in our case gives
[tex](1.00)sin(19.0^o) = (1.50)sin(\theta_2)[/tex]
Solving for [tex]\theta_2[/tex] gives
[tex]\dfrac{(1.00)sin(19.0^o)}{1.50} = sin(\theta_2)[/tex]
[tex]\theta_2 = sin^{-1}[\dfrac{(1.00)sin(19.0^o)}{1.50}][/tex]
[tex]\boxed{\theta_2 = 12.5^o}[/tex]
which is the angle of refraction from air to glass.
(b).
When the light ray goes from glass to back to air again, the angle of refraction equals the angle with which it had entered the glass because of the symmetry in Snell's law:
[tex](1.00)sin(\theta_1) = (1.50)sin(12.5^o)[/tex]
[tex]\boxed{\theta_1 = 19.0^o}[/tex]
The result is that the outgoing ray (one that refracted out from glass to air) and the tracing of the incoming ray (one that refracted into the glass) are parallel to each other.