As a quartz pebble is transported by a stream, the pebble will become more rounded as a result of.
Answers
As a quartz pebble is transported by a stream, the pebble will become more rounded as a result of abrasion.
This is because the rocks that are transported by streams are subjected to a number of forces, including erosion, weathering, abrasion, and transportation.
Abrasion is a process that occurs when rocks collide with other rocks, sand, or gravel in a stream, causing them to wear away.
The degree to which a rock is abraded depends on its hardness, the speed of the water, and the amount of sediment in the stream bed.Quartz is one of the hardest minerals, with a hardness of 7 on the Mohs scale, so it is resistant to weathering and erosion.
However, as it collides with other rocks and is transported downstream, the surface of the quartz pebble is gradually worn away, making it smoother and rounder. Over time, the sharp edges and corners are worn down, resulting in a more rounded shape.
Summary:Quartz pebbles become more rounded as they are transported by streams because of the process of abrasion, which causes the surface of the pebble to wear away as it collides with other rocks and sediment in the stream bed. This results in a smoother, more rounded shape over time.
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Related Questions
13. Austin rode his bike 10 m/s for two minutes. How far did he travel? A. 200 meters B. 1200 meters C. 1000 meters D. 20 meters
Answers
Answer:
B. 1200
Explanation:
60 sec in one min in 2 min there will be 120 sec. 10x120=1200
Did Einstein say compound interest is the 8th wonder of the world?
Answers
Yes, it is commonly attributed to Albert Einstein that he said, "Compound interest is the eighth wonder of the world. He who understands it, earns it... he who doesn't... pays it."
However, there is no direct evidence that he actually said this, and some sources suggest that the quote may have been misattributed to him. Nonetheless, the quote has become popular in the world of finance and investing as a way to emphasize the power of compound interest in generating wealth over time.
Compound interest refers to the process of earning interest on both the initial amount of an investment and on the accumulated interest. This means that as time goes on, the amount of interest earned can grow exponentially, leading to significant gains in the value of an investment over the long term. This is why compound interest is often referred to as the "eighth wonder of the world" as it can have a dramatic impact on financial outcomes.
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If a motor uses 16 W of power to exert a force of 12,000 N to lift an
elevator 8 m, how much time did it take the elevator?
Answers
Answer:
\( \longrightarrow \boxed{ \boxed{ \tt{6000 \: s}}}\)
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If a 0.75 efficient motor produces 150 W of useful power, what was the input power? *
Answers
Answer:
The input power is 200 W
Explanation:
Motor Efficiency
The efficiency of a motor can be calculated as follows:
\(\displaystyle \beta=\frac{P_o}{P_i}\)
Where:
β = efficiency
Po = Output power
Pi = Input power
Solving for Pi:
\(\displaystyle P_i=\frac{P_o}{\beta}\)
The efficiency is β=0.75 and the output power is Po=150 W, thus the input power is:
\(\displaystyle P_i=\frac{150}{0.75}\)
\(P_i=200 \ W\)
The input power is 200 W
How would you position a flat loop of wire in a changing magnetic field so that there is no induced emf in the loop?
Answers
Position the loop so that the field lines run perpendicular to the area vector or parallel to the surface so that there is no induced EMF in the loop
Magnetic Field is the region around a magnetic material or a moving electric charge within which the force of magnetism acts.
Flux is the presence of a force field in a specified physical medium, or the flow of energy through a surface. In electronics, the term applies to any electrostatic field and any magnetic field . Flux is depicted as "lines" in a plane that contains or intersects electric charge poles or magnetic poles.
As we all know that a moving charged particle will experience force by a magnetic field, the magnetic field produced by the field coil remains constant, that is, no force is experienced by electrons of the wire. So, we have to produce a relative motion between magnetic field and electrons.
Whenever the flux passing through the coil changes by any way (like either changing angle, magnetic field or area of coil), we are actually producing a relative motion between electrons and magnetic field. As a result, the electrons experience a magnetic force and shift to produce
flux = \(\int\limits {BAcos(theta)} \,\)
theta = angle between magnetic field and area
Since we know , EMF get induced only when flux changes , if their is no flux change , no EMF can be induced
Hence , in order to not induce any kind of EMF ,we need to maintain a constant flux , but in question it is a changing magnetic field which means changing flux ,in this situation we need to align a flat loop parallel to magnetic field so , their is zero flux through the loop .
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If a solenoid were suspended by a string so that it could rotate freely, could it be used as a compass when it carried a direct current? Could it also be used if the current were alternating in direction?
Answers
Yes, a solenoid suspended by a string can be used as a compass when it carries a direct current. This is because the solenoid creates a magnetic field when current flows through it.
The magnetic field aligns with the Earth's magnetic field, causing the solenoid to point in the direction of magnetic north. However, if the current were alternating in direction, the solenoid would constantly change its orientation and would not be reliable as a compass.
This magnetic field interacts with Earth's magnetic field, causing the solenoid to align itself with the magnetic north and south poles, acting as a compass.
Consequently, a solenoid with an alternating current would not function effectively as a compass.
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5
Drag each tile to the correct box.
Adam takes a bus on a school field trip. The bus route is split into the five legs listed in the table. Find the average velocity for each leg of the trip.
Then arrange the legs of the trip from highest velocity to lowest:
Leg Distance (km) Time (min)
A 18
9
B 25
15
C С 24
8
D
48
12
E
15
7
leg A
leg B
leg C
leg D
leg E
Reset
Next
Answers
2) C
3) E
4) A
5) B
Answer:
1) D
2) C
3) E
4) A
5) B
Explanation:
Hope this help!
Thirteen resistors are connected across points A and B as shown in the figure. If all the resistors are
accurate to 2 significant figures, what is the equivalent resistance between points A and B?
Answers
The equivalent resistance between points A and B in the diagram is 22 Ω
How do I determine the equivalent resistance?We shall begin by obtaining the equivalent resistance in parallel (i,e the three 6 Ω resistor). Details below:
Resistor 1 (R₁) = 6 ΩResistor 2 (R₂) = 6 ΩResistor 3 (R₃) = 6 ΩEquivalent resistance (Rₜ) = ?1/Rₜ = 1/R₁ + 1/R₂ + 1/R₃
1/Rₜ = 1/6 + 1/6 + 1/6
1/Rₜ = 3/6
1/Rₜ = 1/2
Rₜ = 2 Ω
Finally, we shall determine the equivalent resistance between A and B (i.e series arrangement). Details below:
Resistor 1 (R₁) = Resistor 2 (R₂) = ... = Resistor (R₁₁) = 2 ΩEquivalent resistance (R) =?R = R₁ + R₂ + R₃ + R₄ + R₅ + R₆ + R₇ + R₈ + R₉ + R₁₀ + R₁₁
R = 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2
R = 22Ω
Thus, we can conclude that the equivalent resistance is 22 Ω
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when the sun is directly overhead at noon on the equator?
Answers
The sun is directly overhead at noon on the equator on the spring and fall equinoxes, that is around 21 March and 21 September every year.
What are equinoxes?An equinox occurs when the subsolar point of a planet passes through its Equator. The equinoxes are the only times of the year when the Northern and Southern Hemispheres have about equal amounts of day and darkness.
Every year, the Earth experiences two equinoxes: one around March 21 and another around September 22. The equinoxes are sometimes referred to as the "vernal equinox" (spring equinox) and the "autumnal equinox" (fall equinox), despite the fact that they occur at different times in the Northern and Southern Hemispheres.
In the Northern Hemisphere, the March equinox is known as the vernal equinox, while in the Southern Hemisphere, it is known as the autumnal equinox. The September equinox is known as the autumnal equinox in the Northern Hemisphere and the vernal equinox in the Southern Hemisphere.
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Most electromagnets have a core?
A) Why is iron usually used for the core
B) What would happen if you used steel instead
Answers
Iron has strong ferromagnetic properties and that is why it is used as core in electromagnets. However, iron can easily be demagnetized but steel cannot. Steel forms permanent magnet.
What is an electromagnet ?An electromagnet is a material which can form a magnetic field in the presence of an electric field. The magnetic field strength depends on the nature of the material as well the strength of the electric field.
Iron is a metal exhibiting strong ferromagnetic properties. The magnetic field lines can align along the applied field and it can be lost when the applied field is removed.
Therefore, iron can be demagnetized when the switch is off. If we use steel instead it would be very difficult to demagnetize and will form a permanent magnet.
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A sprinter starting from rest on a straight, level track is able to achieve a speed of 12 m/s in 6.0 s. What is the sprinter's average acceleration? Answer in m/s^2 (meters per second squared)
Answers
Given that a sprinter starting from rest on a straight, level track is able to achieve a speed of 12 m/s in 6.0 s. We are supposed to find the sprinter's average acceleration in m/s^2 (meters per second squared).
Average acceleration is defined as the rate at which an object changes its velocity. It is equal to the change in velocity divided by the time taken. Average acceleration = Change in velocity ÷ Time taken
Here, the change in velocity is equal to the final velocity minus the initial velocity. The initial velocity is zero because the sprinter started from rest.
Final velocity, v = 12 m/s
Time taken, t = 6.0 s
Change in velocity = Final velocity - Initial velocity
= v - u = 12 - 0 = 12 m/s
Average acceleration = Change in velocity ÷ Time taken
= 12 ÷ 6= 2 m/s^2
Therefore, the sprinter's average acceleration is 2 m/s^2 (meters per second squared).
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A battery has an emf of 12 V and internal resistance of 0.050 ohms. Its terminals are connected to a load resistance of 3 Ohms. Hence the terminal voltage of the battery is about 11.8 V
Answers
Reconstruction was a success in that it restored the United States as a unified nation: by 1877, all of the former Confederate states had drafted new Reconstruction also finally constitutions, acknowledged the Thirteenth, Fourteenth, and Fifteenth their loyalty to the U.S. government. settled the states’ rights vs. federalism debate that had Amendments, and pledged been an issue since the 1790s.
Reconstruction failed by most other measures: Radical Republican legislation ultimately failed to protect federalism former slaves from white persecution and failed to engender fundamental changes to the social fabric of the South. When President Rutherford B. federalism debate that had been an issue since the 1790s almost mediately . Hayes removed federal troops from the South in 1877, former Confederate officials and slave returned to With the support of a conservative Supreme Court, these newly empowered white southern politicians passed black codes, voter qualifications, and other anti-progressive legislation to reverse the rights that blacks had gained during Radical Reconstruction. The U.S. Supreme Court bolstered this anti-progressive movement federalism with decisions in the Slaughterhouse Cases, the Civil Rights Cases, and United States v.
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12) Driving home from school one day, you spot a ball rolling out into the street (FIGURE 5-27). You brake for 1.20 s, slowing your 950-kg car from 16.0 m>s to 9.50 m>s. What was the average forceexerted on your car during braking and How far did you travel while braking?
Answers
We are given the following information
Mass of car = 950 kg
Initial speed of car = 16.0 m/s
Final speed of car = 9.50 m/s
Time = 1.20 s
The average force exerted on the car during braking can be found using Newton's 2nd law of motion
\(F=m\cdot a\)Where m is the mass of the car and a is the acceleration of the car.
The acceleration of the car is given by
\(\begin{gathered} a=\frac{v_f-v_i}{t} \\ a=\frac{9.50-16.0}{1.20} \\ a=-5.4167\; \; \frac{m}{s^2} \end{gathered}\)The negative sign indicates deacceleration since the car is stopping.
So, the force is
\(\begin{gathered} F=m\cdot a \\ F=950\cdot5.4167 \\ F=5145.865\; \; N \end{gathered}\)Therefore, an average force of 5145.865 N was exerted on your car during braking.
The distance traveled by the car while braking can be found as
\(s=v_i\cdot t+\frac{1}{2}\cdot a\cdot t^2\)Let us substitute the given values
\(\begin{gathered} s=16.0\cdot1.20+\frac{1}{2}\cdot(-5.4167)\cdot(1.20)^2 \\ s=19.20-3.90 \\ s=15.3\; m \end{gathered}\)Therefore, the car traveled a distance of 15.3 m while braking.
describe a cars velocity when it goes around a track at a constant speed
Answers
Answer:
A race car on an oval track has a constant speed. But, as the race car goes around the track, the direction in which the car is moving changes. This means that the velocity of the car is changing. An object has constant velocity if neither the speed nor direction it is moving changes.Which types of electromagnetic waves have wavelengths that are longer than those of visible light but shorter than those of microwaves?
Answers
Answer: last one radio waves
Or d
Explanation:
Answer:
infrared
Explanation:
ed2020
When the height of the cylinder increased from 100 m to 1000 m, what happened to the amount of heat generated in the system? it decreased by a factor of 10. it decreased by a factor of 5. it increased by a factor of 5. it increased by a factor of 10.
Answers
When the height of the cylinder increased from 100 m to 1000 m, the heat generated is 10 times.
The energy of possessed by the body by virtue its position is called potential energy. This energy is converted in the form of heat.
The formula of potential energy is given by
P.E. = mgh
where, m is the mass of body, h be the height of body and g be the acceleration due to gravity.
The potential energy of the body when it is at a height of 100 m is
P = m x g x 100 = 100 mg
The potential energy of the body when it is at a height of 1000 m is
P' = m x g x 1000 = 1000 mg
The ratio of P' and P is 10.
So, the heat generated is 10 times.
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Answer:
D. It increased by a factor of 10.
Explanation:
Answers
Enter the correct digit code (no spaces) *
Answers
Answer:
7468 with no spaces
Explanation:
hope this helped!
An alternate power source can be ____ driven by some form of prime mover(s)
on-site generator(s)
equipped with fully engaged locks
Patient Care Vicinity.
Answers
An alternate power source can be mechanically driven by some form of prime mover(s) equipped with fully engaged locks to ensure stable and reliable power generation. This type of power source is commonly used in healthcare facilities,
particularly in patient care vicinities where uninterrupted power is critical for patient safety and wellbeing. Prime movers such as diesel generators, gas turbines, and fuel cells can be used to drive alternators and produce electrical power. These prime movers are typically connected to a transmission system that includes a control panel, switchgear, and distribution panels to regulate and distribute power to the facility. In the event of a power outage or interruption from the main power grid, the alternate power source can kick in and provide power to essential equipment and systems until the main power source is restored. Overall, an alternate power source is an essential component of any healthcare facility's emergency preparedness plan and can ensure patient safety and wellbeing during critical situations.
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the science building is 5.25 m tall a. How many decimeters is it? b. How many millimeter is it? *show work*
Answers
Answer:
5.25m to 52.5 Decimeters (10x)
5.25m to 5250 Millimeters (1000x)
And that would mean it would be 5250 millimeters. For the show your work thing, all you really had to do to solve this is move the decimal point depending on what type of measurement you were changing it into. So try and kinda write something like that down where you move the decimal point. Hope this helps
Describe three common issues that affect societies across places and times
Answers
Answer
Common issues that affect societies across places and times include healthcare, disease, natural disasters, drought, unemployment, racism, war, pollution, over-use of resources, selecting leaders, high taxes, education, and relationships with other countries.
please help me I need to get this right
Answers
Does the speedometer of a car measure average speed or instantaneous speed? Explain.
Answers
The speedometer of a car measures instantaneous speed. It tells you the speed of the car at any given moment in time.
The speedometer of a car measures instantaneous speed. This means it gives the reading of the speed at any given moment in time.
Main part: The speedometer of a car measures instantaneous speed. It tells you how fast you are driving at that particular moment. The speedometer gives you a direct reading of how fast your vehicle is traveling. It measures the vehicle's speed at any given moment in time, rather than calculating the average speed of the entire journey.
A speedometer is attached to a vehicle's wheels to measure its speed. As the wheels turn, the speedometer calculates the speed at which they are turning. Inside the speedometer, there is a component called a speedometer cable. This component is connected to the back of the speedometer's drive mechanism. The other end of the cable is connected to a gear that is inside the transmission or the transfer case. When the vehicle is moving, the driveshaft turns the gears in the transmission or transfer case. The gear connected to the speedometer cable also turns, causing the cable to rotate. The rotation of the cable creates a magnetic field that drives the speedometer's magnetometer, which is connected to the speedometer pointer. This causes the pointer to move along the dial and show the speed of the vehicle on the speedometer.
Conclusion: In conclusion, the speedometer of a car measures instantaneous speed. It tells you the speed of the car at any given moment in time.
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a teacher wants to demonstrate that the radioactive source emits alpha beta and gamma radiation.
describe a method the teacher can use
Answers
It is possible to distinguish between these types of radiation by the use of an electrostatic field.
What is a radioactive source?A radioactive source is a source that emits radiation such as alpha, beta and gamma radiation. We can be able to distinguish between these types of radiation by the use of an electrostatic field.
The gamma rays is undeflated by the field, the alpha ray is deflated to the negative part of the field while the beta rays is deflated by the positive part of the field.
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Does science support the idea that humans have influenced global warming?
Provide specific examples that show how two knowledgeable individuals with differing opinions might argue.
Answers
Answer:
A: Scientists agree that the earth's rising temperatures are fueling longer and hotter heat waves, more frequent droughts, heavier rainfall, and more powerful hurricanes.
Explanation:
A bicycle with a mass of 100kg hit a wall at an acceleration of 4 m/s2, what is the force?
Answers
Answer:
400N
Explanation:
F= ma
F= 100 x 4
F= 400N
what is magnetic effect of current electricity
Answers
Answer:
The magnetic effect of electric current is known as electromagnetic effect. :)
Explanation:
the magnetic effect which is connected with electricity is called magnetic effect of current.
What’s the answer to this question? Is it C?
Answers
6. If displacement of a particle is zero, the distance covered by
a.may or may not be zero
b.must be zero
c.must not be zero
d. Must be unity
Answers
if a car is accelerating downhill under a net force of 3674 N, what additional force would cause the car to have a constant velocity?
Answers
Hi there!
For an object to have a constant velocity, the SUM of the forces must equal 0. This means that the forces are balanced.
When a car is accelerating downhill, it is experiencing a force due to gravity of F = MgsinФ.
In order to balance the forces, there must be an equal and OPPOSITE force acting on the object. This would be a force of kinetic friction.
Thus:
∑F = -F (Kinetic Friction) + MgsinФ
0 = -F (Kinetic Friction) + MgsinФ
MgsinФ = F (Kinetic Friction)
Thus, the force of Kinetic Friction = -3674 N
(Negative indicates in the opposite direction)
Match the description to the type of lens. concave convex
see picture
Answers
From the diagram;
A concave lens curves in wards and diverge
A convex lens curves outwards causing light to converge
The types of lensThe inside of a concave lens curves. Light rays flowing through it diverge or spread out because it has a core that is thinner than it does and borders that are thicker. The lens's curving surface on the concave side contributes to its shape and gives it the appearance of being hollowed out. A concave lens can diverge light due to this curvature, which gives it negative optical power.
The outside of a convex lens curves. Light rays flowing through it converge or gather together because it is thicker in the middle and thinner on the sides. The lens's bulging look is a result of the curved surface on the convex side of the object.
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