Answer:
We will no longer have a need for other food sources, and driving to stores and fridges will be obsolete, we will need to work less, and carbon dioxide levels will fall.
Explanation:
At what location in this diagram do the magnetic field lines show that the magnetic field is strongest ?
The location in this diagram do the magnetic field lines show that the magnetic field is strongest is in C and wekeness in D.
What are magnetic field lines?The lines representing the magnetic field are closed, that is, they have no beginning or end. This can be observed when we place iron filings on a sheet of paper, over a bar magnet: the pattern of lines formed continues on the part of the paper that is on the magnet, closing.
In the region of the poles we see that the lines of magnetic induction are closer to each other, therefore, we consider that close to the poles the magnetic field is more intense. In this case it is stronger in C and weaker in D.
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Answer:
The strongest is C
Explanation:
Just took the test and got it right, I don't need to over-explain it
determine the angular velocity of the spool. the cable wraps around the inner core, and the spool does not slip on the platform p . take va
Explanation:
To determine the angular velocity of the spool, you can follow these steps:
Step 1: Identify the known variables.
The known variables in this case are the linear velocity of the cable (va) and the radius of the inner core (r).
Step 2: Understand the relationship between linear and angular velocity.
The relationship between linear velocity (va) and angular velocity (ω) can be described by the equation: va = rω.
Step 3: Solve for the angular velocity.
Rearrange the equation from step 2 to solve for the angular velocity: ω = va / r.
Step 4: Plug in the known variables.
Substitute the given values of va and r into the equation: ω = va / r.
Step 5: Calculate the angular velocity.
Perform the calculation to find the angular velocity of the spool.
By following these steps, you will be able to determine the angular velocity of the spool.
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Which of the following substance used to selectively absorb certain frequencies of light and transmit or reflect the rest; responsible for object's colour?
A. Reflection
B. Refraction
C. Pigment
D. Tyndall scattering
Answer:
\(D. \: Tyndall \: scattering.\)
Determine the forces in members abab and cbcb of the truss, and use the correct signs to state if the members are in tension or compression. Set θθ = 30 ∘∘
The forces in members ab and cb are 4 kN (compression) and 2.3094 kN (tension), respectively.
Given, θ = 30°; Load P = 4 kN
Let's find out the force in member AB:
As the load P is applied at joint B, the horizontal force in member AB will be equal to the force P. Thus,
HAB = P = 4 kN
Now, to find out the force in member CB, let's resolve forces horizontally and vertically at joint B.
Horizontal equilibrium: HCB - P = 0
HCB = P = 4 kN
Vertical equilibrium: VCB - HAB * tanθ = 0
VCB = HAB * tanθ = 4kN * tan30°
VCB = 2.3094 kN
Now, let's resolve forces at joint C.
Vertical equilibrium: VCA - VCB - 2 kN = 0
VCA = VCB + 2 kN
VCA = 2.3094 kN + 2 kN
VCA = 4.3094 kN
The forces in members AB and CB are 4 kN and 2.3094 kN, respectively.
Members AB and CB are in compression and tension, respectively.
Thus, the forces in members ab and cb are 4 kN (compression) and 2.3094 kN (tension), respectively.
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Formulate a hypothesis on how the force between a pair of cars in a
train undergoing constant acceleration compares to the forces
between other cars in the same train.
The force between a pair of cars in a train undergoing constant acceleration is much more significant compared to the forces between other cars in the same train.
The hypothesis on how the force between a pair of cars in a train undergoing constant acceleration compares to the forces between other cars in the same train is detailed below.
As the cars in a train undergo constant acceleration, the force between a pair of cars is more significant than the forces between other cars in the same train. This is due to the fact that as the acceleration increases, the force between a pair of cars increases because the car at the back is pushed forward while the car in front is pulling backward, and as a result, there is an increase in the force acting between the two cars.
However, the forces between other cars in the same train are not as significant as the force between a pair of cars because there is no direct contact between them, and hence the force is much less. The greater the acceleration, the greater the force acting between a pair of cars in the train, while the force acting between other cars remains negligible.
Therefore, the force between a pair of cars in a train undergoing constant acceleration is much more significant compared to the forces between other cars in the same train.
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5.Which graph above shows an object's acceleration? 1pt
6. Why did you choose that graph in question above (explain why)? 1pt
in the equation for the gravitational force between two objects which quantity must be squared?
Answer:
Distance
Explanation:
trust me
Answer:
The distance "r" must be squared
Explanation:
In the equation F=GMm/r^2, the distance "r" is squared, which represents the distance between masses M and m and G is the gravitational constant.
what is the third harmonic of a tone that has a fundamental frequency of 150hz
The third harmonic of a tone with a fundamental frequency of 150 Hz is 450 Hz.
The frequency of an event is the number of times it occurs or repeats in a specific amount of time. Frequency refers to the rate at which waves oscillate or vibrate in the context of waves, such as sound or light waves. It is expressed in hertz (Hz), or the number of cycles per second. A higher frequency denotes more cycles taking place in a specific amount of time, giving rise to higher pitches for sound waves or a bluer color for light waves. Understanding different phenomena relating to waves, communication networks, and the behavior of electromagnetic radiation depends fundamentally on frequency.
The extra frequencies that are generated in addition to a wave's basic frequency are referred to as harmonics. There are harmonics that are integer multiples of the fundamental frequency that are produced when a vibrating item or sound source makes a tone with that fundamental frequency. To find the third harmonic of a tone with a fundamental frequency of 150 Hz, we multiply the fundamental frequency by 3.
Third harmonic frequency = Fundamental frequency × 3
Third harmonic frequency = 150 Hz × 3
Third harmonic frequency = 450 Hz
Therefore, the third harmonic of a tone with a fundamental frequency of 150 Hz is 450 Hz.
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In addition to setting a pricing objective, a firm has to look at a number of factors before setting its prices. These factors include the offering’s costs, the customers whose needs it is designed to meet, the external environment—such as the competition, the economy, and government regulations—and other aspects of the marketing mix, such as the nature of the offering, the stage of its product life cycle, and its promotion and distribution. In international markets, firms must look at environmental factors and customers’ buying behavior in each market. For a company to be profitable, revenues must exceed total costs.
Answer the following questions. Each response must be written in essay format to include 4-5 complete sentences.
1. What factors do organizations consider when making price decisions?
2. How do a company’s competitors affect the pricing decisions the firm will make?
3. What is the difference between fixed costs and variable costs?
Customers are willing to pay what they think something is worth and don't really care about your costs. If your costs push prices above their perceived value, they simply won't buy. If the perceived value is much higher than your costs, they'll happily pay a price that gives you a huge margin. One of the best examples of this is in retail clothing.
A bowling ball is traveling at 3 m/s. It starts to roll up a ramp. How high above the ground will the ball be when it stops rolling? Neglect friction and assume the ramp is plenty long enough to do this. (For this problem your initial kinetic energy can be set equal to your final potential energy. 1/2mv2 = mgh).
Answer:
h= 0.45 m
Explanation:
PE= 1/2 mv^2 KE= mgh
v= 3m/s
vf= 0 m/s
h=?
PE= 1/2(1kg)(3m/s)^2
PE= 4.5 J
4.5 J/ 1kg(9.8 m/s^2)
h=0.45 m
The height of the ball above the ground when it stops is 0.46 m.
The initial kinetic energy of the ball is equal to the final potential energy of the ball.
⇒ Formula:
mv²/2 = mghv² = 2gh............... Equation 1⇒ Where:
v = velocity of the ballh = height of the ball above the groundg = acceleration due to gravity.⇒ make h the subject of the equation
h = v²/2g.............. Equation 2From the question,
⇒ Given:
v = 3 m/sg = 9.8 m/s²⇒ Substitute these values into equation 2
h = 3²/(2×9.8)h = 9/19.6h = 0.46 mHence, the height of the ball above the ground when it stops is 0.46 m.
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How to make a for and against for People work from home in order to reduce their energy consumption with these constraints: cost, safety, reliability and maintenance, aesthetics, social and cultural impact, and environmental impact.
with websites bibliography. must have a for and against for each of the 6 constraints.
To develop arguments for and against people working from home to reduce their energy consumption with the restrictions explained in the question, you should do structured research on the topic to create your opinion.
What could be the arguments for working from home?Regarding the cost, we could argue in favor that this work would reduce costs of fuel, public transport, parking, etc. As for the arguments against, we could argue that this could increase domestic costs with electricity and computer maintenance.
So you can follow this example to make your own case for working from home and such restrictions, doing research on each to identify what the advantages and disadvantages are.
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1. A 5 kg block is pulled across a table by a horizontal force of 40 N with a frictional force of 8 N
opposing the motion. Calculate the acceleration of the object.
The acceleration of the block is 6.4 m/s².
To calculate the acceleration of the block, we need to consider the forces acting on it.
The applied force is 40 N, and since it is the only horizontal force in the direction of motion, it is the net force acting on the block.
The frictional force opposing the motion is 8 N.
The acceleration, we can use Newton's second law, which states that the net force acting on an object is equal to its mass multiplied by its acceleration (F = ma).
The net force is the difference between the applied force and the frictional force:
40 N - 8 N = 32 N.
Now, we can plug the values into Newton's second law:
32 N = 5 kg × a.
Solving for the acceleration (a), we get
a = 32 N / 5 kg
a = 6.4 m/s².
Therefore, the acceleration of the block is 6.4 m/s².
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a
b
с
3
A brick is shown in Figure 1.9. It has a mass of
2.8 kg.
65 mm
102.5 mm
215 mm
Figure 1.9: A brick labelled with its dimensions.
Give the dimensions of the brick in metres.
Calculate the volume of the brick.
Calculate the density of the brick.
Answer: A 0.065 METER 0.1025 METER 0.215 METER
B 0.001432 meter^3
C 1955.307 kg/m^3
Explanation:
QUESTION 6 New cars have a crumple zone to help minimise injuries during accidents. In addition seat belts, air bags and padded interiors can reduce the chance of death or serious injury.
6.1 Use principles in Physics to explain how air bags can reduce the chance of death or injury. (3)
Using principles in Physics the way in which air bags can reduce the chance of death or injury is that the airbag increases the time over which the velocity of the head changes so that the acceleration is reduced, and thus the force is reduced.
What is an Airbag?This is referred to as a vehicle occupant-restraint system using a bag designed to inflate extremely quickly, then quickly deflate during a collision.
The gas in the bag can only leave at a certain rate which makes it deflates slowly, and the time duration of the deceleration increases which therefore leads to the force being reduced during a collission and reduces the risk of injury.
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When a 10-V battery is connected to a resistor, the current in the resistor is 2 A. What is the resistor's value
Answer:
5 ohms
Explanation:
V = IR
10 = 2 R
R = 5
The great red spot is a gigantic storm located on which planet in our solar system?.
A physicist observes that a cannonball shot horizontally from a cannon travels 1.000 m before falling to the ground. Which of the following statements correctly explains this observation using Newton's laws?
O Objects tend to remain in the state of motion they are in unless acted upon by an unbalanced force. Friction and gravity acted on the cannonball, slowing it down and slamming it into the ground
O Objects at rest tend to remain in their cument state of motion unless acted upon by an unbalanced force, but objects in motion require a continual application of force to stay in motion
The force on the cannonball produced by the cannon was less than the force of friction on the cannonball, causing the cannonball to slow down and fall to the ground.
O The force on the cannonball produced by the cannon exactly equaled the force of friction on the cannonball, balancing the forces and causing it to fall to the ground.
The correct statement that explains the observation using Newton's laws is objects at rest tend to remain in their current state of motion unless acted upon by an unbalanced force, but objects in motion require a continual application of force to stay in motion. Here option A is correct.
According to Newton's first law of motion, an object will continue moving at a constant velocity in a straight line unless acted upon by an external force. In this case, when the cannonball is shot horizontally from the cannon, it initially possesses a forward velocity due to the force applied by the cannon. However, once the cannonball is in motion, the only forces acting on it are gravity and friction.
Gravity acts vertically downward, causing the cannonball to accelerate downward. Friction acts horizontally in the opposite direction to the motion of the cannonball. As the cannonball moves forward, friction opposes its motion and gradually slows it down.
Since there is no force continuously propelling the cannonball forward, and the forces of friction and gravity act on it, the cannonball eventually comes to a stop and falls to the ground. Hence option A is correct.
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The following data was taken during a student's experiment with an object moving at a relatively constant velocity. Use the data to create a position-time graph (on the accompanying graph paper). Be sure to include a best-fit line. After the graph is completed, use your best-fit line to calculate the average speed of the object. Show speed calculations below.
Based on the best-fit line, the average speed of the object is equal to 6.15 m/s.
What is a scatter plot?A scatter plot is also referred to as scatter chart, scatter diagram or scattergram and it can be defined as a type of graph which is used for the graphical representation of the values of two (2) variables, with the resulting points showing any association (correlation) between the data set.
What is a position vs time graph?A position vs time graph can be defined as a type of graph that is used to graphically represent the distance traveled (covered) by an object from its starting position with respect to the time when it is started moving.
By critically observing the graph (see attachment) which models the data in the given table, we can infer and logically deduce that the linear function from the best-fit line is given by:
y = 6.35x + 0.86
What is a slope?In Mathematics, the slope of a straight line on a position vs time graph simply refers to the ratio of displacement to time interval and it represents the average speed.
For the average speed, we have:
Average speed, ΔV = Δd/Δt
Average speed, ΔV = (40 - 8)/(6.2 - 1.0)
Average speed, ΔV = 32/5.2
Average speed, ΔV = 6.15 m/s.
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Section 1: Experimental Overview
Use your answers from questions 1-3 as the basis for the first section of your lab report. This section provides your reader with background information about why you conducted this experiment and how it was completed. Outline the steps of the procedure in full sentences. It also provides potential answers (your hypothesis/es) relative to what you expected the experiment to demonstrate. This section should be 1-3 paragraphs in length.
Answer:
1-state what the lab is about, that is, what scientific concept (theory, principle, procedure, etc.) you are supposed to be learning about by doing the lab. You should do this briefly, in a sentence or two. If you are having trouble writing the opening sentence of the report, you can try something like: "This laboratory experiment focuses on X…"; "This lab is designed to help students learn about, observe, or investigate, X…." Or begin with a definition of the scientific concept: "X is a theory that…."
2-give the necessary background for the scientific concept by telling what you know about it (the main references you can use are the lab manual, the textbook, lecture notes, and other sources recommended by the lab manual or lab instructor; in more advanced labs you may also be expected to cite the findings of previous scientific studies related to the lab). In relatively simple labs you can do this in a paragraph following the initial statement of the learning context. But in more complex labs, the background may require more paragraphs.
Explanation:
Which of the following is a measurement of acceleration?
O 33 km/h^2
O 20 m/s
O 300 m/s north
O 780 m/s^2 north
Answer:
D
Explanation:
i did that yesterday and your welcome homie b
The maximum magnetic field strength of an electromagnetic field is 5×10^−6 T . Calculate the maximum electric field strength if the wave is traveling in a medium in which the speed of the wave is 0.75c.
The maximum electric field strength if the wave is traveling in a medium in which the speed of the wave is 0.75c is 4 × 10^2 V/m.
The electric field strength can be calculated using the formula E = cB, where c is the speed of light and B is the magnetic field strength. Substituting the values, we get E = (3 × 10^8 m/s) × (5 × 10^−6 T) = 1.5 × 10^2 V/m.
However, since the wave is traveling in a medium in which the speed of the wave is 0.75c, the electric field strength will be different. The speed of the wave in the medium affects the relationship between the electric and magnetic fields. When the speed of the wave decreases, the electric field strength increases and vice versa.
To calculate the electric field strength when the speed of the wave is 0.75c, we need to use the formula E = (c/v)B, where v is the speed of the wave in the medium. Substituting the values, we get E = (3 × 10^8 m/s / 0.75c) × (5 × 10^−6 T) = 4 × 10^2 V/m.
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Petroleum is a non -renewable resource. Therefore, its use needs
to be planned so that present and future use can be adequately met.
Explain how the optimal level of use of petroleum can be
achieved.
Petroleum is a non-renewable resource, which means that it cannot be replenished. Because of this, its usage needs to be planned properly to make sure that there is sufficient availability for present and future needs
The optimal level of use of petroleum can be achieved by several ways which are listed below:
1. Reduce wastage: The optimal level of petroleum use can be achieved by reducing wastage. We should aim to use petroleum products efficiently to minimize wastage and ensure that the resource is not used up too quickly.
2. Develop alternative energy sources: Another way to achieve the optimal level of petroleum use is to develop alternative energy sources. Renewable energy sources like solar, wind, and hydro can be developed to supplement petroleum.
3. Increase efficiency: The third way to achieve the optimal level of petroleum use is to increase efficiency. We can achieve this by improving the efficiency of vehicles and machinery that consume petroleum products.
4. Conservation: Conservation can also help achieve the optimal level of petroleum use. We can conserve petroleum by using it judiciously and avoiding unnecessary use. We can also reduce our reliance on petroleum products by using alternatives like public transport or bicycles.
5. Develop sustainable transportation: Developing sustainable transportation can also help achieve the optimal level of petroleum use. We can develop transportation systems that are more efficient, rely on alternative energy sources, and reduce the amount of petroleum consumed.
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To understand decay in terms of half-life and to solve radioactive dating problems.Suppose a radioactive sample initially contains N0unstable nuclei. These nuclei will decay into stable nuclei, and as they do, the number of unstable nuclei that remain, N(t), will decrease with time. Although there is no way for us to predict exactly when any one nucleus will decay, we can write down an expression for the total number of unstable nuclei that remain after a time t:N(t)=N0e−λt,where λ is known as the decay constant. Note that at t=0, N(t)=N0, the original number of unstable nuclei. N(t) decreases exponentially with time, and as tapproaches infinity, the number of unstable nuclei that remain approaches zero.Part (E) Suppose that an Egyptian farmer claims to have discovered a linen burial cloth used during Egypt's Middle Kingdom some 4000 years ago. Careful analysis shows that the cloth contains 80% of the 14C that it is estimated to have originally contained. How old is the cloth? (years)
The age of the cloth material is obtained from the calculation as 1843 years .
What is the half life?We know that the half life of a radioactive isotope refers to the time that is taken for only half of the number of the original radioactive isotopes that are present to remain in the sample.
We can be able to obtain the age of the cloth by looking at the amount of the radioactive carbon -14 that is still left in the sample. How do we do that? We have to turn to a formula that says;
0.693/\(t_{\frac{1}{2} }\) = 2.303/tlog (Ao/A)
\(t_{\frac{1}{2} }\) = half life of the material
t = age of the material
Ao = amount initially present
A = Amount present at time t
Then we have;
0.693/5730 = 2.303/tlog (Ao/0.8Ao)
1.21 * 10^-4 = 0.223/t
t = 0.223/1.21 * 10^-4
t = 1843 years
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If a 325 W heater has a current of 6.0 A, what is the resistance of the heating element?
O 10 Ohms
O 50 Ohms
88 Ohms
9 Ohms
The resistance of the heating element is 9 Ohms
What is Ohm's law?Ohm's law states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) between them. Mathematically, this can be expressed as:
V = IR
Equation:In this scenario, we are given the power (P) and current (I) of a heater, and we are asked to find its resistance (R). Power can be calculated using:
P = IV
where V is the voltage across the heater. Since we are not given the voltage, we can rearrange Ohm's law to solve for the resistance:
R = V/I
Substituting the formula for power into this equation, we get:
R = (V/I) = (P/I²)
Substituting the given values of power and current, we get:
R = (325 W) / (6.0 A)² = 9.0 Ohms
The correct answer is (D).
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Based on the forces of inertia and momentum, ________ varies according to speed, weight, and the distance between impact and stop.
The amount of force required to stop an object, based on the forces of inertia and momentum, varies according to speed, weight, and the distance between impact and stop.
Inertia is the tendency of an object to remain in motion unless acted upon by an outside force, while momentum is the product of an object's mass and velocity. The amount of force required to stop an object is proportional to its mass, velocity, and the distance it needs to travel before it comes to a stop. The greater the mass, velocity, and distance, the more force is required to stop the object.
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Why are car radiators painted black?
Answer:
To absorb heat
Explanation:
A black color is said to absorb much heat . This helps in cooling the engine as the radiator has absorbed the heat efficiently .
Additional Information:
A black object absorbs all wavelengths of light and reflects non , that is why it appears black .The more light an object absorbs , the more heat it absorbs .popular sovereignty left the fate of slavery up to the people in each territory.
Yes, the concept of popular sovereignty did leave the fate of slavery up to the people in each territory. Popular sovereignty was a principle advocated during the mid-19th century in the United States as a way to determine the status of slavery in newly acquired territories.
Under popular sovereignty, it was believed that the residents of a territory should have the right to decide whether to allow or prohibit slavery within their borders. This principle emerged as a compromise solution to the contentious issue of slavery expansion into new territories during the period leading up to the American Civil War.
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An archer shoots an arrow in the air, horizontally. However, after moving some
distance, the arrow falls to the ground. Name and define the initial force that sets
the arrow in motion. Explain why the arrow ultimately falls down.
Answer:
The name of the force is elastic (spring) force
Explanation:
The elastic force which is the restoration force of an elastic (spring like) object that tries to return to its initial non-stretched state built up by the pulling of the bow by the archer (using the muscles) pushes on the arrow which the archer releases the same time he leaves the bow string, and the arrow flies in the direction already pointed by the archer
The arrow ultimately falls down due to gravity forces that acts on all objects within the Earths gravitational field. However due to the speed of constant horizontal speed of the arrow and increasing downward speed of the due to the gravity force, the falling of the arrow looks disappointing.
the silvered wall of a vacuum bottle takes care of heat flow by
Radiation
Convection
Conduction
Conduction and convection
an object 1.70 cm high is held 3.00 cm from a person's cornea, and its reflected image is measured to be 0.167 cm high. what is the magnification?