Answer:
Explanation:
The variables we know and are given are:
time, t = 20s
Charge, Q = 3x1-^-6 electrons, which is just 3x10^-6C (C stands for Coulombs, which is the unit for Charge)
We need to find the current, I, and since we know Q and t we can substitute these values into the given equation:
I=Q/t (which if you look at what the RHS is saying, its Charge over time, or more literally means the amount of charge passing a point over a period of time)
If we substitute these values, we will get I as:
I = Q / t
I = 3x10^-6 / 20
I = 1.5x10^-7 A
Hope this helps!
As one goes from left to right in a period, which of the following is true?
A. The number of protons decreases.
B. The number of valence electrons increases.
C. both A and B
D. none of the above
Answer:
The correct answer is C , because it increases and decreases
Explanation:
As one goes from left to right in a period on the periodic table, the number of protons increases while the number of valence electrons remains the same or slightly increases.
Explanation:As one goes from left to right in a period on the periodic table, the number of protons increases while the number of valence electrons remains the same or slightly increases.
This pattern is observed because the number of electrons in the energy levels fills up as you move across the period, and the number of protons in the nucleus also increases. The increase in protons leads to a greater positive charge in the nucleus, which attracts more electrons, resulting in a tendency for the number of valence electrons to increase or remain the same.
Therefore, the correct answer is option D: none of the above, as neither the number of protons nor the number of valence electrons decreases consistently as one goes from left to right in a period.
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The driver of a car slams on the brakes, causing the car to slow down at a rate of
26ft/s2 as the car skids 256ft to a stop.
How long does the car take to stop?
What was the car's initial speed?
ft/s 4
Answer:
A. The time taken for the car to stop is 3.14 secs
B. The initial velocity is 81.64 ft/s
Explanation:
Data obtained from the question include:
Acceleration (a) = 26ft/s2
Distance (s) = 256ft
Final velocity (V) = 0
Time (t) =?
Initial velocity (U) =?
A. Determination of the time taken for the car to stop.
Let us obtain an express for time (t)
Acceleration (a) = Velocity (V)/time(t)
a = V/t
Velocity (V) = distance (s) /time (t)
V = s/t
a = s/t^2
Cross multiply
a x t^2 = s
Divide both side by a
t^2 = s/a
Take the square root of both side
t = √(s/a)
Now we can obtain the time as follow
Acceleration (a) = 26ft/s2
Distance (s) = 256ft
Time (t) =..?
t = √(s/a)
t = √(256/26)
t = 3.14 secs
Therefore, the time taken for the car to stop is 3.14 secs
B. Determination of the initial speed of the car.
V = U + at
Final velocity (V) = 0
Deceleration (a) = –26ft/s2
Time (t) = 3.14 sec
Initial velocity (U) =.?
0 = U – 26x3.14
0 = U – 81.64
Collect like terms
U = 81.64 ft/s
Therefore, the initial velocity is 81.64 ft/s
Final answer:
To find the stopping time and initial speed of the car, kinematic equations for constant acceleration are used. The initial speed is calculated using the equation for the final velocity at rest, and the time is then determined by the equation relating velocity, initial speed, and acceleration. The car takes 3 seconds to stop completely.
The car travels 39.0 ft in this time.
The car's initial velocity was 52 ft/s.
Explanation:
To determine how long the car takes to stop and the car's initial speed, we can use the kinematic equations of motion for constant acceleration. Given that the deceleration is 26ft/s2 and the skid to a stop is 256 feet, we use the equation v2 = u2 + 2as, where v is the final velocity, u is the initial velocity, a is the acceleration, and s is the distance traveled. Because the car comes to a stop, the final velocity v is 0.
The equation simplifies to u2 = -2as. Substituting the given values, we get u2 = -2(−26)(256), so the initial speed u = √(2 × 26 × 256).
Once we find u, we can use the equation v = u + at to find the time t the car takes to stop. Rearranging for t, we have t = (v - u)/a. We substitute v = 0 and the calculated initial speed for u to get t.
A wave has an amplitude of 0.0800 m and is moving .33 m/s . One oscillator in the wave takes 0.115 s to go from the lowest point in its motion to the highest point. Find the period of the wave.
Answer:
0.230 s
Explanation:
The period is the length of time from one peak to the next. If it takes the oscillator 0.115 s to go from the lowest point to the highest point, then it takes another 0.115 s to return to the lowest point. So the period is 0.115 + 0.115 = 0.230 seconds.
The period of the wave, based on the student's observation of a half-cycle taking 0.115 seconds, is calculated to be 0.230 seconds by doubling this time for a full cycle.
Finding the Period of a Wave
The student has observed that one oscillator in a wave takes 0.115 seconds to go from the lowest point to the highest point in its motion. This is half the time of a full oscillation, as it must go from the lowest point to the highest point, and back down again to complete one cycle. Therefore, to find the period of the wave, we must double that amount of time. Thus, the period (T) of the wave is:
T = 2 x 0.115 s = 0.230 s
Refraction occurs when a wave
a enters a new medium at an angle.
b. hits a surface through which it cannot pass.
c. moves around a barrier.
d interferes with another wave.
An object is located 10.0 cm from a convex mirror. The magnitude of the
mirror focal length is 15.0 cm. What is the image distance? Use the equation
df
d-f
A. -30.0 cm
B. 6.00 cm
C. 30.0 cm
D. -6.00 cm
SUBT
Answer:
-6.00 - a p e x
A longitudinal wave is observed to be moving along a slinky. Adjacent crests are 2.4 m apart. Exactly 6 crests are observed to move past a given point in 9.1 s. Determine the wavelength, frequency, and speed of this wave.
Answer:
The wavelength is 2.4 m (the distance between crests). The frequency is 0.66
Hz (6 crests/sec / 9.1 s). The speed of the wave is 0.66 * 2.4m = 1.58 m/s.
Explanation:
The wavelength, frequency and speed of the given wave is required.
The wavelength of the wave is 2.4 m
The frequency of the wave is 0.659 Hz.
The speed of the wave is 1.582 m/s.
The distance between adjacent crest is 2.4 m.
This is the wavelength of the wave.
[tex]6\ \text{crest}=9.1\ \text{s}[/tex]
[tex]1\ \text{s}=\dfrac{6}{9.1}=0.659\ \text{Hz}[/tex]
The velocity of the wave is the product of wavelength and frequency
[tex]2.4\times \dfrac{6}{9.1}=1.582\ \text{m/s}[/tex]
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Green plants convert light energy from the sun into ______. * a. gravitational potential energy b. chemical potential energy c. thermal energy d. mechanical energy
Answer:
chemical potiential energy
Answer:
A: Gravitational potential energy
Explanation:
Plants use the energy of the sun to transform it to food which is energy that is stored and is used to "work"
A circular loop of radius r is rotated through a magnetic field B, which of the following would increase the magnetic flux through the loop by a factor of 16?
Doubling B and quadrupling r.
Quadrupling B and doubling r.
B remains constant and quadrupling r.
Doubling B and doubling r.
Answer: B
Explanation: I think
The correct option that would increase the magnetic flux through the loop by a factor of 16 is quadrupling B and doubling r.
The correct option that would lead to an increase in the magnetic flux through the loop by a factor of 16 corresponds to statement: Quadrupling B and doubling r.
To understand this, let's break it down:
Doubling B and quadrupling r: 2 × 4 = 8
Quadrupling B and doubling r: 4 × 2 = 8
B remains constant and quadrupling r: 1 × 4 = 4
Doubling B and doubling r: 2 × 2 = 4
Thus, only quadrupling B and doubling r would lead to an increase in the magnetic flux through the loop by a factor of 16.
Wind and water power are types of
energy?
A)renewable
B)nonrenewable
explain how a maglev train provides evidence that magnetic fields can apply forces between objects that do not touch.
Answer:
Powerful electromagnets are fitted on top of guideways either ttract or repel the magents fitted on the bottom of train. The froce of attraction/repulsion rasies the train in hovering position.
Explanation:
Magentic fields exist between two opposite/like poles. The poles do not have to be touching each other. They can be separated by a distance in a medium that doesn' block magnetic field.
In magelv train the magnetic forces between two poles are used to operate the train. The two poles are separated by train body and air.
3. A wave in a 12m rope is shown in a diagram in one second
l<--------------- 12m
a) What is the wavelength of this wave
b) If the frequency of the wave is 2 Hz, what is the wave speed?
The wavelength of the wave in the 12m rope could be 12 meters if the wave spans the entire length of the rope. The wave speed is calculated to be 24 m/s when frequency is 2 Hz and assuming the wavelength is 12m. Similar methods apply for other wave speed calculations.
Explanation:To answer the student's questions:
a) The wavelength of a wave in a 12 m rope is not given explicitly in the question. However, if it is implied that the wave spans the entire length of the rope, then the wavelength would be 12 meters.b) The wave speed can be calculated using the formula: wave speed = frequency × wavelength. Given that the frequency of the wave is 2 Hz, and assuming the wavelength is the length of the rope (12 m), the wave speed would be 2 Hz × 12 m = 24 m/s.For another example, question 38 stated: "Scouts at a camp shake the rope bridge they have just crossed and observe the wave crests to be 8.00 m apart. If they shake the bridge twice per second, what is the propagation speed of the waves?" The propagation speed would be the frequency (2.00 Hz) multiplied by the wavelength (8.00 m), giving 16.00 m/s.
The Eclipses only occur one more time during the year 2025, and that is on September 7th (Lunar) and September
21" (Solar). If we have a full moon and a new moon every month, why do you think we can't see a lunar and solar
eclipse every month?
Answer:
the moon isn't always at the right angle between the earth and the sun for us to see or for it to have a effect not the best at space but that's what I think the reason is . I wonder what the proper answer is
Explanation:
For an object moving at a constant acceleration, we would expect the position-time graph for this object to have a ______ shape.
A. linear
B. nonlinear
An object moving with constant acceleration will display a nonlinear relationship on a position-time graph due to the consistent change in velocity.
Explanation:For an object moving at a constant acceleration, the position-time graph would have a nonlinear shape. This is due to the fact that constant acceleration implies a constant rate of change in velocity, which in turn means that the object's speed is increasing or decreasing consistently over time. On a position-time graph, this is represented by a curve, rather than a straight line, demonstrating a nonlinear relationship between time and position. For instance, the graph might show a parabolic curve if the object is speeding up, or a hyperbolic curve if it is slowing down.
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If you drew magnetic field lines for this bar magnet, which statement would be true?
A. Arrows pointing away from both north and south
B. Arrows pointing toward both north and south
C. Arrows point away from north and toward south
D. Arrow point away from south and towards north
Final answer:
The correct answer is C. Arrows point away from north and toward south.
Explanation:
The correct answer would be option C. Arrows point away from north and toward south. In a bar magnet, the magnetic field lines are defined to have the direction that a small compass points when placed at a location. If we use small compasses to map the magnetic field around a bar magnet, they will point away from the north pole of the magnet and toward the south pole of the magnet. So, the magnetic field lines would point away from the north pole and towards the south pole of a bar magnet.
Select the correct answer.
Which of these people takes proper security measures while using mobile apps?
A Kate downloads an app and grants all the permissions.
B. Emily has many unused apps on her smartphone.
C. Jonas downloads all the apps from a bulletin board.
D. john checks all the reviews of an app and reads the permissions before granting access to an app.
Reset
Next
Answer:
D. john checks all the reviews of an app and reads the permissions before granting access to an app.
Explanation:
Just got it correct in Plato, 100% positive.
The correct answer is D. John takes proper security measures while using mobile apps. John checks all the reviews of an app and reads the permissions before granting access.
Explanation:The correct answer is D. John takes proper security measures while using mobile apps. John checks all the reviews of an app and reads the permissions before granting access to an app.
Checking app reviews is important because it can provide insights into the app's reliability, security, and user experience. By reading the permissions before granting access, John ensures that the app does not request unnecessary access to personal information or device features.
Appropriate security measures help protect user privacy and prevent potential risks such as data breaches or malicious activities.
Atoms are happy (they will not readily react with other elements) when they have a full outside ring of
electrons.
O True
O False
Answer: TRUE
Explanation:
Atoms are happy when they will not react with other elements while having a full outside ring of electrons because this makes them to be noble.
A stable atom possesses full outside ring of electrons while unstable one does not. So, they are happy also because of stability.
Explain how Lee’s surrender at Appomattox affected the South’s Civil War effort.
Explanation:
Lee's surrender did not end the Civil War, but it was the beginning of the end. The surrender of other Confederate armies began shortly after: The Army of Tennessee surrendered on April 26, 1865. Confederate armies in Alabama, Mississippi, and eastern Louisiana all surrendered on May 4, 1865.
Very easy physics maths about current and other stuffs only one question please help me
Three identical resistors of resistance 3 ohms are connected in series in a circuit. What is the total voltage of the battery if the current in the circuit is 2A ?
Answer:
Total voltage of the battery is 12 volts.
Explanation:
It is given that, we have three identical resistors of resistance 3 ohms are connected in series in a circuit. It is required to find the total voltage of the battery if the current in the circuit is 2 A.
Let [tex]R'[/tex] is the equivalent resistance in series combination. The equivalent resistance is given by :
[tex]R'=R_1+R_2\\\\R'=3+3\\\\R'=6\ \Omega[/tex]
Let V is the total voltage of the battery. Ohm's law is given by :
[tex]V=IR\\\\V=2\times 6\\\\V=12\ V[/tex]
So, the total voltage of the battery is 12 volts.
Make a claim as to whether analog signals or digital signals are more reliable to transmit information. Use evidence and reasoning to support you claim
ok this is the answer
How was Mendeleev's table different from Meyer's table? A. Mendeleev did not arrange according to chemical properties. B. Meyer did not arrange by atomic mass but Mendeleev did. C. Meyer did not leave gaps while Mendeleev did. D. Mendeleev did not arrange according to physical properties.
Answer: C. Meyer did not leave gaps while Mendeleev did.
Explanation: Mendeleev's table was table different from Meyer's table because Meyer did not leave gaps while Mendeleev did.
The temperature at one of the Viking sites on Mars was found to vary daily
from -90 degree Fahrenheit to -5 degree Kelvins. Convert these
temperatures to Kelvin. *
Answer: T = 305.22 K
Explanation: given that
from -90 degree Fahrenheit to -5
degree Kelvins
Using the formula
(9/5 C) + 32 = F
Let's first convert degree Fahrenheit to degree Celsius
90 = 9C/5 + 32
9C/5 = 90 - 32
9C/5 = 58
9C = 290
C = 290/9
C = 32.22 degree Celsius
Convert degree Celsius to Kelvins
T = 273 + C
T = 273 + 32.22
T = 305.22K
Final answer:
To convert temperature from Fahrenheit to Kelvin, you can use the formula K = (F + 459.67) * 5/9. The temperatures of -90°F and -5°F are equivalent to approximately 183.15 K and 252.04 K, respectively.
Explanation:
To convert temperature from Fahrenheit to Kelvin, you can use the formula:
K = (F + 459.67) * 5/9
Using this formula, let's calculate the Kelvin temperatures for the given Fahrenheit temperatures:
-90°F:
K = (-90 + 459.67) * 5/9 = 183.15 K
-5°F:
K = (-5 + 459.67) * 5/9 = 252.04 K
Therefore, the temperatures of -90°F and -5°F are equivalent to approximately 183.15 K and 252.04 K, respectively.
Question 1
Name a star in the main sequence
Antares
Pollux
Epsilon Eridani
Sirius B
Does anyone have the answers to the Unit 5 Earth in the Solar System Unit Test? Tommorow is the last day of school! Need the answers please!
Answer:
Epsilon Eridani
Explanation:
This is in the main sequence as you can see there is an area called "main sequence all you have to do is read all the stars and to see which one is in there and that is The epsilon eridani
Option C is correct. A star in the main sequence will be Epsilon Eridani.
What is Epsilon Eridani ?
Epsilon Eridani is a star in the Eridanus constellation, located south of the celestial equator. This makes it visible from the majority of the Earth's surface.
A star is a heavenly body made up of a brilliant spheroid of plasma held together by gravity. The Sun is the closest star to Earth.
Many additional stars may be seen with the normal eye at night, but due to their great distance from Earth, they appear as stationary points of light in the sky.
A star in the main sequence will be Epsilon Eridani.
Hence, option C is correct.
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This type of a boundry can be located
at around 40 N latitude and 0 long titude
the fences around individual shops or homes in eastern Spain
The student's question is about a boundary around 40° N latitude and 0° longitude, which lies in the midlatitudes region. The exact nature of the boundary is unclear, but it could relate to geographic or climatic divisions. Additional context is needed for a precise answer.
The student is asking about a type of boundary that can be located around 40° N latitude and 0° longitude. This location is commonly associated with the midlatitudes, which are the regions of Earth that are neither part of the tropics nor the polar regions. The boundary mentioned in the context of latitude around this area could be referring to the division between the Earth's climatic cells, such as the boundary between the Ferrel cell and the polar cell, which typically occurs around the 60° latitude. However, since the question specifies around 40° N latitude, which is within the middle latitudes, it's not clear which specific type of boundary the student is inquiring about without additional context.
In the absence of additional context, it's also worth noting that the Equator, Arctic Circle, and Antarctic Circle are important parallels but do not intersect 40° N latitude. The prime meridian is the only line of longitude with a value of 0° and intersects the Earth at different latitudes, including 40° N.
choose the correct label for each of the identified points in the sketch.
A:
B:
C:
D:
Answer:
A. negativly charged
B. leader
C. return stroke
D. possitively charged
Explanation: hope this helps!!
The label for each of the identified points in the sketch is A the cloud that is negatively charged, B lightening, C leader, and D earth's surface which is positively charged.
What is the principle of lightning?The principle of lightning is based on the buildup of electrical charge in the atmosphere. Lightning is an electrical discharge that occurs when there is a difference in electrical charge between the atmosphere and the ground. This difference in charge is caused by the separation of positive and negative charges within a thunderstorm cloud.
The main parts of a lightning bolt are:
The stepped leader: This is the initial discharge of electricity that moves towards the ground from the cloud. The stepped leader is a series of steps that propagate toward the ground in a zigzag pattern.
The dart leader: This is a single path that moves rapidly towards the ground, and it usually follows the path established by the stepped leader.
The return stroke: This is the main flash of lightning that we see. It is the result of the connection between the downward-moving stepped leader or dart leader and the upward-moving streamers from the ground. This connection completes the electrical circuit and allows the discharge of electricity to occur.
The Thunder: This is the sound that is produced by the sudden expansion of air around the lightning bolt. Thunder is caused by the intense heat of lightning, which can heat the air to temperatures of up to 30,000 Kelvin (53,540 degrees Fahrenheit).
Lightning is a complex and dynamic phenomenon, and there are many different factors that can affect the way it behaves. However, these four parts are the basic components of a lightning bolt and help us understand how it is formed and how it travels from the cloud to the ground.
Therefore, the leaders coming from the cloud are negatively charged, while the streamers on the ground are positively charged. The return stroke, which is the main flash of lightning, consists of positively charged ions moving from the ground to the cloud.
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The closer the particles are together, the ______ sound is able to move.
Answer:
Faster
Explanation:
The closer the particles are together, the faster sound is able to move.
Sound travels the slowest through the air because gas particles are more spread apart than liquids or solids.
Sound will travel the fastest through solids because the particles in solids are densely packed together.
Final answer:
Sound travels faster in mediums where particles are closer together due to increased density. Solids, being more dense, allow for quicker sound transmission compared to liquids and gases. Temperature and movement of the medium also play a role in the speed of sound.
Explanation:
The closer the particles are together, the faster sound is able to move. This principle is due to the increased density of the medium, which allows sound waves to be transmitted more efficiently between particles. Sound travels faster in solids than in liquids, and faster in liquids than in gases because the particles in solids are much closer together, making solid mediums the most dense.
Furthermore, temperature affects the speed of sound; warmer mediums increase particle movement leading to faster sound transmission. Additionally, the speed of sound is influenced by the medium's movement, such as the impact of wind helping or hindering the travel of sound waves depending on the direction of the sound relative to the wind.
Match the term with the appropriate image.
(a) The object position is represented by the first image.
(b) The focal length of the mirror is represented by the last image.
(c) The image position is represented by the second image.
Object position in the mirror
The position of the object in the mirror is represented by an upward arrow. The object is this question is the upward arrow towards left hand side.
Image formed by the mirrorThe image formed by the mirror in this question is inverted and it is represented by an downward arrow towards the left.
What is focal length?This is the distance between the lens and the focal point. The last image in the diagram represents the focal length of the mirror.
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[OU.03] What is the best method to increase the accuracy of the parallax measurement of star distances?
Answer: Trigonometric or Stellar Parallax
Explanation:
Whenever a star is too far away to measure its parallax, astronomers do match its color and spectrum to one of the standard candles and determine its intrinsic brightness.
Comparing this to its apparent brightness, they can get a good measure of its distance by applying the 1/r^2 rule.
Astronomers estimate the distance of nearby objects in space by using a method called stellar parallax, or trigonometric parallax. They measure a star's apparent movement against the background of more distant stars as Earth revolves around the sun.
(WILL MARK BRAINLIEST and 21pts) Which layer of the sun contains jets of rapidly moving gas called spicules?
a. Core
b. Corona
c. Photosphere
d. Chromosphere
Answer:
You may be able to avoid these annoyances in the chromosphere — the reddish middle layer of the sun that links the star's surface to its outer atmosphere, or corona — but that neighborhood is not without its hazards, either. This vast layer is marked by a constantly moving forest of plasma spears known as spicules.
Explanation:
Answer:
D. Chromosphere
Explanation:
The chromosphere contains spikes of gas called spicules. Spicules are short-lived phenomena, corresponding to rising jets of gas that move upward at about 30km/sec and last only about 10 minutes.
How does a seat belt stop your body from moving in a forward motion in a car?
The seatbelt acts as an opposing force coming from the car.
The inertia from the seatbelt stops your body from moving forward when the car stops.
The seatbelt defies gravitational laws to help you from moving forward.
When a moving car suddenly stops, your body is still moving forward until the seatbelt stops you.
Answer:
It's D
Explanation:
I have the answer key
A beam of yellow monochromatic light passes from quartz (n = 1544) into
water (n = 1333). In the water, the beam makes an angle of 35.0° with the
normal. When the beam is traveling in the quartz, what angle does it for with
the normal? (A) 25.1 (B).29.8 (C)38.9 (D) 20.6
Answer:
CANT SOO SORRY
Explanation:
Answer:
The answer is 29.8 (b)
Explanation:
I just took a quiz with this question on there and this was the answer.