Answer B. the direction of force is the same
you have 3 three laser pointers next to each other. the first one creates a blue laser beam, the second one creates a green laser beam and the third one creates a red laser beam. which quantity or quantities are different in the electromagnetic waves coming out of the three laser pointers?
The blue laser pointer will produce blue light, green will produce green light, and red will produce red light.
The electromagnetic waves produced by the three laser pointers differ in two key quantities: wavelength and frequency. Wavelength refers to the distance between two peaks or troughs of a wave, while frequency is the number of waves that pass a given point in one second. The blue laser pointer has the shortest wavelength, which means it has the highest frequency among the three. The green laser pointer has a longer wavelength than blue, and therefore a lower frequency. Finally, the red laser pointer has the longest wavelength, and the lowest frequency. It's important to note that these differences in wavelength and frequency determine the color of the light produced by each laser pointer. The human eye perceives different colors of light based on the wavelength of the electromagnetic waves it encounters. So, the blue laser pointer will produce blue light, green will produce green light, and red will produce red light.
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you step into an elevator, and it accelerates to a downward speed of 4.3 m/s, after which its speed is constant. your apparent weight during the acceleration is 85% of your actual weight.
When you step into an elevator and it accelerates to a downward speed of 4.3 m/s, your apparent weight during the acceleration is 85% of your actual weight. This means that you will feel lighter than your true weight. Once the elevator reaches a constant speed, your apparent weight will return to your actual weight.
During the acceleration phase, the upward force exerted by the floor of the elevator is less than the force of gravity pulling you downwards. This results in a net force acting on you in the downward direction, which causes you to feel lighter. The apparent weight can be calculated using the equation:
Apparent weight = Actual weight - Net force
In this case, the net force is equal to 15% of your actual weight. Once the elevator reaches a constant speed, the net force becomes zero and your apparent weight equals your actual weight.
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A piano tuner creates an 880.0 Hz tone.
When he plucks a piano string, the two
waves create a beat frequency of
5.0 Hz. The string could have two
possible frequencies. What is the
highest value it could have?
(Speed of sound = 343 m/s)
(Unit = Hz)
885 hz for the highest
875 hz for the lowest
acellus correct
9. A speedboat engine exerts 90000 W of power in moving the boat through the water. The velocity of the boat is 1P = 5 m/s. What force does the engine apply to do this?
P = F x V
Answer:
it g hope it helps you out
solid are _______, usually in a regular repeating pattern
Answer:
particles or arranged will be the answer depending on the previous line.
Answer:
Solids are crystalline , usually in a regular repeating pattern.
a 10-n falling object encounters 4 n of air resistance. the net force on the object is a) 0 n. b) 4 n. c) 6 n. d) 10 n. e) none of these
The gravitational force in this situation is 10 N, whereas the air resistance is 4 N. As a result, the net force acting on the object is 10 N – 4 N = 6 N
The difference between the gravitational force drawing the thing downward and the air resistance obstructing its motion makes up the net force on a falling object that encounters air resistance.
Newton's law of gravitational force (F) has the following equation:
Where:
The gravitational constant, G, is 6.67 x 1011 N*m2/kg2.
m: is the initial object's mass
M: is the second object's mass.
R: is the separation between the objects' mass centres.
The aforementioned equation demonstrates that the gravitational force is inversely correlated to the separation between the objects. So, the gravitational force decreases with increasing distance and increases with decreasing distance, and vice versa.
The gravitational force in this situation is 10 N, whereas the air resistance is 4 N. As a result, the net force acting on the object is 10 N – 4 N = 6 N.
Thus, the response is (c) 6 N.
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An electrically charged atom is called an
Answer:
It's called an ion. Excuse me if I'm wrong.
Explanation:
Does Temperature Change Viscosity in Liquid. (I need this for research)
Answer: A big Yes
Explanation: Viscosity depends strongly on temperature. In liquids, it usually decreases with increasing temperature, whereas, in most gases, Viscosity increases with increasing temperature.
As temperature increases, the average kinetic energy of the molecules also increases; it more easily overcomes the attractive forces between molecules. Therefore, Viscosity decreases with increasing temperature.
For example, when syrup is cold it has a high viscosity and can be difficult to pour. When heated in a microwave, the viscosity decreases and the syrup flows more freely. Similarly, Honey and oil tend to flow better at higher temperatures.
Both cohesion and molecular interchange contribute to liquid viscosity. With high temperatures, viscosity increases in gases and decreases in liquids, the drag force will do the same.
When a liquid is heated, the kinetic energy of its molecules increases and the intermolecular attraction becomes weaker. Hence, the viscosity of a liquid decreases with an increase in its temperature.
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Materials A, B, and C are solids that are at their melting temperatures. Material A requires 200 J to melt 4 kg, material B requires 300 J to melt 5 kg, and material C requires 300 J to melt 6 kg. Rank the materials according to their heats of fusion. If multiple materials rank equally, use the same rank for each, then exclude the intermediate ranking (i.e. if objects A, B, and C must be ranked, and A and B must both be ranked first, the ranking would be A:Greatest, B:Greatest, C:Third greatest). If all materials rank equally, rank each as 'Greatest'.
Answer:
B: Greatest, A: Second greatest, C: Second geratest.
Explanation:
We can calculate the heat of fusion of a material (ΔHfus), which is the heat required to melt 1 kg of material, using the following expression.
ΔHfus = Q/m
where,
Q: heat providedm: massMaterial A
ΔHfus = 200 J/4 kg = 50 J/kg
Material B
ΔHfus = 300 J/5 kg = 60 J/kg
Material C
ΔHfus = 300 J/6 kg = 50 J/kg
Then, considering the heats of fusion,
B: Greatest, A: Second greatest, C: Second greatest.
On the Earth, these convection cells form because of the __________ heating of the Earth and changes in pressure.
Group of answer choices:
even
equal
unequal
consistent
On the Earth, these convection cells form because of the unequal heating of the Earth and changes in pressure. Option C is correct.
What is a convection cell?A convection cell is a phenomenon that happens when there are density changes inside a liquid or gaseous medium.
The essential characteristics of a convection cell are rising and/or falling currents, which are caused by density variations.
These convection cells arise on Earth as a result of the Earth's uneven heating and pressure variations.
On the Earth, these convection cells form because of the unequal heating of the Earth and changes in pressure.
Hence,option C is correct.
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Radiometric dating of rocks, based upon measuring the proportions of radioactive isotopes and their decay products within these rocks, now allows us to determine Earth's age to an accuracy of about
4.5 billion years. This method of radiometric dating is based on the decay of radioactive isotopes, such as uranium and potassium, into stable isotopes over time.
By measuring the ratio of the radioactive isotope to its decay product in a sample of rock, scientists can calculate the amount of time that has passed since the rock formed.
The accuracy of radiometric dating depends on a number of factors, including the precision of the measurement instruments used, the quality of the rock samples being analyzed, and the assumptions made about the initial concentrations of the isotopes being measured. However, with modern techniques and instrumentation, radiometric dating can typically provide an accuracy of within 1-2% for rocks that are a few billion years old.
It is worth noting that radiometric dating is just one of several methods used to determine the age of the Earth. Other techniques include studying the rates of erosion and sedimentation, the ages of meteorites, and the ages of rocks and minerals formed during key geological events. These complementary methods provide additional evidence that supports the estimated age of the Earth.
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EASY QUESTIONS! DUE IN 15 MIN WILL MARK BRAINLIEST.
1. What is the sum of a vector 8 m south and a vector 12 m north? *
2. What is the sum of a vector 12 m north and a vector 8 m north? *
PLEASE SHOW WORK AND EXPLAIN
Explanation:
As they are in same direction, you can add them directly. And result is 12 + 8 m = 20 m North. If you use vector addition: Vectors = 12m & 8 m & angle b/w them is 0°(as both are in same direction).
venus has a higher average surface temperature than mercury. why?
Score for Question 1: Click or tap here to enter text. of 10 points) 1.A sailboat moves north for a distance of 20.0 km when blown by a wind from the exact southwest with a force of 3.50 x 10^4 N. The sailboat travels the distance in 2.5 h. a) How much work was done by the wind? b) What was the wind’s power? Your response should include all of your work and a free-body diagram. 2, 2. A worker applies 170 N of force on a lever to lift a 1250 N crate 0.10 m. a) If the lever is 100% efficient, how far does he need to push his side? Your response should include all of your work. 2. A worker applies 170 N of force on a lever to lift a 1250 N crate 0.10 m. a) If the lever is 100% efficient, how far does he need to push his side? Your response should include all of your work.
a) To find the work done by the wind, we use the formula: work = force * distance * cos(angle)
The angle is the angle between the direction of the force and the direction of motion. In this case, the wind is blowing from the southwest, which is 45 degrees relative to north. work = (3.50 x 10^4 N) * (20.0 km) * cos(45 degrees) work = (3.50 x 10^4 N) * (20.0 km) * 0.7071. Make sure to convert the distance from kilometers to meters and the angle from degrees to radians if necessary. b) To find the power, we use the formula: power = work / time. Plug in the value of work from part a and the given time of 2.5 hours. For question 2: a) If the lever is 100% efficient, it means that the work done on one side of the lever is equal to the work done on the other side. The work done can be calculated using the formula: work = force * distance. Plug in the given values of force and distance.
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you are using a 50-mm-focal-length lens to photograph a tree. if you change to a 100-mm-focal-length lens and refocus, the image height on the detector changes by a factor of
The image height on the detector will change by a factor of 2 if you change from a 50-mm-focal-length lens to a 100-mm-focal-length lens and refocus.
The magnification of a lens is given by the ratio of the image height to the object height. Since the object height remains the same, the change in magnification is solely determined by the change in focal length.
The magnification of a lens is given by the formula:
Magnification = - (image distance / object distance).
Since we are only interested in the ratio of image heights, we can ignore the negative sign.
For the 50-mm lens, the magnification is:
Magnification1 = 50 mm / object distance.
For the 100-mm lens, the magnification is:
Magnification2 = 100 mm / object distance.
Taking the ratio of the two magnifications:
Magnification2 / Magnification1 = (100 mm / object distance) / (50 mm / object distance) = 100 mm / 50 mm = 2.
Therefore, the image height on the detector changes by a factor of 2 when switching from a 50-mm-focal-length lens to a 100-mm-focal-length lens and refocusing.
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What is the volume of a liquid with a mass of 0.254 g and a density of 1.00 g/ml?
0.254 g x (1 g/ml) = 0.254 ml
A Force is applied onto a mass causing it to accelerate. If the same Force was applied to a SMALLER mass, what would happen to that acceleration?
1. The acceleration would increase
2. The acceleration would stay the same
3. The acceleration would decrease
4. The acceleration would change direction
Answer:
1. The acceleration would increase.
Explanation:
This is because according to Newton's law, the less mass there is, the more velocity.
What is the BEAT FREQUENCY when 512 Hz and a 515 Hz tuning forks are sounded at the same time?
The beat frequency is 3 beats/sec.
Beat frequency(n) can be found by using the following formula:
n=f2-f1, where f2 and f1 are the given frequencies
n= 515-512
n= 3 beats/sec
Therefore the beat frequency when 512 Hz and 512Hz tuning forks are sounded together is 3 beats/sec.
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. a typical operating voltage of an electron microscope is 50 kv. (i) what is the smallest distance that it could possibly resolve? (ii) what energy of neutrons could achieve the same resolution? (iii) what are the main factors determining the actual resolution of an electron microscope
The wavelength of an electron is inversely proportional to its energy, so the higher the energy, the smaller the wavelength. A typical operating voltage of 50 kV would correspond to a wavelength of 0.0024 nm.
This can be calculated using the equation E = hc/λ, where E is the energy, h is Planck's constant, c is the speed of light, and λ is the wavelength.
The electron source determines the brightness of the beam, the lens system determines the size and shape of the beam, and the specimen and detector determine the signal-to-noise ratio of the image. Additionally, the operating voltage and current of the electron microscope can also affect the resolution.
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What is living being
Answer:
the things that eat, breathe, grow, move, reproduce and have senses is called living beings.
Two people try to lift a heavy box. Jack pulls upward with a 100-newton
force. Jill pulls upward with a 50-newton force, but neither person moves the
box.
Compare the amount of work done on the box by Jack and Jill.
OA) Jack did twice as much work as Jill.
OB) Jack did fifty times more work than Jill.
OC) Jack and Jill did the same amount of work.
Answer:
A ( Jack did twice as much work as Jill
Explanation:
Before the 1998 discovery of accelerating expansion, astronomers focused on the so-called standard models. Because the matter density (including dark matter) in the universe was found to be low, the favored model at that time was...
A.) closed
B.) flat
C.) open
D.) spherical
Before the discovery of accelerating expansion in 1998, astronomers favored the flat model for the universe due to the low matter density.
Before the discovery of accelerating expansion, astronomers relied on the standard models to describe the structure of the universe. These models were based on the understanding that the matter density, including dark matter, played a crucial role in determining the overall geometry of the universe. Observations indicated that the matter density was relatively low, leading to the favored model being a flat universe.
In a flat universe model, the overall geometry is considered to be flat, similar to a Euclidean space. This means that the geometry obeys the laws of Euclidean geometry, where parallel lines do not intersect and the sum of angles in a triangle is 180 degrees. A flat universe suggests that the expansion of the universe will continue indefinitely without collapsing or expanding at an accelerating rate.
The other options listed - closed, open, and spherical - refer to different geometries of the universe. A closed universe implies a positively curved geometry, while an open universe indicates a negatively curved geometry. A spherical universe implies a specific type of closed geometry where the universe wraps around itself. However, due to the observed low matter density, the flat model was the favored choice before the discovery of accelerating expansion.
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Upon inspiration, what is the name of the air in the conducting zone that is not available for gas exchange?.
Dead space is the name of the air in the conducting zone that is not available for gas exchange.
What is conducting zone?
The conducting zone consists of all of the structures that provide passageways for air to travel into and out of the lungs.
The conducting zone is part of the respiratory system. It serves as a route for incoming and outgoing air and filtering debris and pathogens from the incoming air.In order to compensate for the reduction in gas exchange in the respiratory system, ventilation will increaseThe volume of air that is inhaled that does not take part in the gas exchange is dead space. Because it either remains in the conducting airways or reaches alveoli that are not perfused or poorly perfused.
Dead space volume is air in the conducting airways that does not participate in gas exchange between the alveoli and blood.
Hence,
Dead space is the name of the air in the conducting zone that is not available for gas exchange.
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What does dalton theory have in common with democritus
Answer:
Democritus and Dalton has similar ideas about the atom, but Democritus based his theory more on reason than science. ... His ideas were similar to those of Democrites in that he believed that atoms were indivisible and that atoms of one substance are all alike but are different from atoms of another substance.
Explanation:
PLS MAKE ME AS BRAINLIST
Answer:
Democritus and Dalton has similar ideas about the atom, but Democritus based his theory more on reason than science. ... His ideas were similar to those of Democrites in that he believed that atoms were indivisible and that atoms of one substance are all alike but are different from atoms of another substance.
Explanation:
Which of these is an example of printed material? question 4 options: a voicemail an issue of sports illustrated magazine a recording of a speech a text message to a friend
Answer:
(b) an issue of sports illustrated magazine
Explanation:
You want to identify an example of printed material.
Printed materialThe term "printed material" generally refers to text and/or graphics represented in ink on paper. Modern "ink" may be a plastic or carbon material that is fused to the paper by heat.
An issue of Sports Illustrated magazine, choice B, will be an example of printed material.
Other mediaModern communication is often electronic, rendered on a view screen or as audio. Instances of this sort of communication are voicemail, a recording, and a text message.
Among the options given the Sports Illustrated Magazine is an example of printed material. The other options are not considered printed because they are in digital or audio formats.
Explanation:Among the options provided, the Sports Illustrated Magazine is an example of a printed material. Printed materials are those that are typically put into a physical form using any form of printing method, like magazines, books, brochures, and posters. A voicemail, a recording of a speech, and a text message to a friend are not printed materials because they are digital or audio formats, not physical ones.
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A spring-loaded ballistic cart measuring 0.5 kg is in contact with a second 0.8 kg cart. The carts are
initially at rest on a level surface. The spring is released and the lighter cart is observed to move at +0.4
m/s afterward. What is the velocity of the other cart?
A spring-loaded ballistic cart is in contact with a second cart. The velocity of the other cart is 0.25 m/s.
What is the conservation of linear momentum?When there is no external force acting on the system, the initial momentum is equal to the final momentum.
Momentum is equal to the product of mass and its velocity.
According to the conservation of linear momentum,
m₁v₁ +m₂v₂ = m₁u₁ +m₂u₂
u and v represents the initial and final velocity. 1 and 2 represents the first and second cart.
Given is m₁ = 0.5 kg, m₂ =0.8kg, u₁ =u₂ =0 m/s and v₁ = 0.4 m/s.
Substituting the values in the conservation of momentum equation, we get the velocity of second cart is
0.5 x 0.4 + 0.8 x v₂ = 0.5 x 0 + 0.8 x 0
v₂ = +0.25 m/s (in the direction of first cart)
Thus, the velocity of the other cart is 0.25 m/s.
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why does oxygen has a greater force of attraction between its particles than nitrogen? PLEASE HELP!
Answer:
Because it is more electronegative than nitrogen.
Explanation:
Oxygen has greater force of attraction between it's Molecules than nitrogen because it is more electronegative than nitrogen and this is because it has more slightly charged positive protons in it's electrons and thus make it slightly negative in it's nucleus. It has 8 electrons in it's nucleus compare to 7 electrons nitrogen has and this will make a bonding pair to occur in oxygen than nitrogen.
Which of these scenarios describes circular motion?
es )
A)
The moon orbiting the Earth
B)
A cannonball flying from a cannon
C)
A car moving along a straight track
D)
The pendulum of a grandfather clock
A)
The moon orbiting the Earth
a self-propelled vehicle of mass m, whose engine delivers a constant power p, has an acceleration a
The acceleration of a self-propelled vehicle of mass m, whose engine delivers a constant power p, is given by the equation a = p / (m × v). By understanding this relationship, we can analyze and predict the behavior of the vehicle based on its power, mass, and velocity.
A self-propelled vehicle of mass m, whose engine delivers a constant power p, has an acceleration a.
To understand the relationship between the mass of the vehicle, the power of the engine, and the acceleration, we can use the equation:
P = F × v
Where P is the power, F is the force, and v is the velocity of the vehicle. Since the vehicle is self-propelled, the force F is equal to the product of the mass m and the acceleration a:
F = m × a
Combining these equations, we have:
P = m × a × v
Since the engine delivers a constant power p, we can rewrite the equation as:
p = m × a × v
Now, if we want to find the acceleration a, we can rearrange the equation as:
a = p / (m × v)
This equation tells us that the acceleration of the vehicle depends on the power of the engine, the mass of the vehicle, and the velocity. If any of these factors change, the acceleration will also change accordingly.
In conclusion, the acceleration of a self-propelled vehicle of mass m, whose engine delivers a constant power p, is given by the equation a = p / (m × v). By understanding this relationship, we can analyze and predict the behavior of the vehicle based on its power, mass, and velocity.
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Question 1 of 10
Assuming that voltage remains constant, what happens to the current in a
wire if the length of the wire increases?
A. The current is not affected by a change in wire length.
B. The current decreases.
C. The current alternates between high and low values.
D. The current increases.