Two lightbulbs A and B are connected in series to a constant voltage source. When a wire is connected across B, bulb A will:
(a) Glow brighter than before
(b) Glow just the same as before
(c) Glow dimmer than before.
(d) Go out completely
(e) None of the above
Answers
When a wire is connected across bulb B, the current in the circuit will increase, causing the voltage across bulb A to decrease. Therefore, bulb A will glow dimmer than before. The answer is (c) Glow dimmer than before.
When two lightbulbs A and B are connected in series to a constant voltage source and a wire is connected across B, bulb A will:
(c) Glow dimmer than before.
Explanation:
1. In a series connection, the same current flows through both bulbs A and B.
2. When a wire is connected across bulb B, it creates a parallel connection for bulb B, offering an alternative path for the current to flow.
3. Since the wire has lower resistance than bulb B, most of the current will flow through the wire, and less current will flow through bulb B.
4. As a result, the overall current in the circuit will decrease, causing bulb A to glow dimmer than before.
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Related Questions
max (15 kg) and maya (12 kg) are ice-skating on a frozen pond. when max is standing on the shore, he throws a 1.5-kg snowball at maya, who is standing at the center of the pond. maya catches the snowball and she and the snowball move away from the shore at 2.0 m/s. how fast was the snowball moving right before maya caught it?
Answers
The speed of the snowball before Maya caught it was 104 m/s.
According to the law of conservation of momentum, the sum of the initial momenta will be equal to the sum of the final momenta.
Mass of Max = 15 kg
Mass of Maya = 12 kg
Mass of Snowball = 1.5 kg
Now, using the law of conservation of momentum, we have
The momentum of Max + Momentum of Snowball = Momentum of Maya + Momentum of Snowball
Initial Momentum of Max = 0 (as Max is standing on the shore)
The momentum of Snowball = mv (where m is the mass of the snowball and v is the velocity of the snowball)
The momentum of Maya = mv (where m is the mass of Maya and v is the velocity of Maya with snowball)
Final Momentum of Snowball = (m + m) × v
Now putting these values, Initial momentum = 0 + 1.5 × vi = 1.5vi
Final momentum = 15 × u + 12 (2 u) = 39u (where u is the velocity of Maya with snowball after catching)
Initial Momentum = Final Momentum 1.5vi = 39u
We can write u = 2m/s
Thus putting the value of u, we can calculate the initial velocity of the snowball.
vi = u × (39 / 1.5) = 104 m/s
Thus, the speed of the snowball before Maya caught it was 104 m/s.
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Which statement best describes the main idea of the poem
Two roads diverged in a yellow wood, And sorry I could not travel both And be one traveler, long I stood And looked down one as far as I could To where it bent in the undergrowth; Then took the other, as just as fair, And having perhaps the better claim, Because it was grassy and wanted wear; Though as for that the passing there Had worn them really about the same, And both that morning equally lay In leaves no step had trodden black. Oh, I kept the first for another day! Yet knowing how way leads on to way, I doubted if I should ever come back. I shall be telling this with a sigh Somewhere ages and ages hence: Two roads diverged in a wood, and I— I took the one less traveled by, And that has made all the difference.
A. The speaker informs the reader about two roads.
B. The speaker expresses his feelings about nature.
C. The speaker describes his unfulfilled dreams and wishes.
D The speaker explains a difficult decision he had to make.
Answers
Explanation:
option D ) is correct the speaker explain a difficult decision he had to make
hi everyone comment
If you wanted to soundproof your bedroom, the best material to line the walls would be
1. dense material such as plywood
2. soft material such as a foam cushion
3. a very hard material such as ceramic tile
Answers
Answer:
a soft foam material because soft materials absorb sound better
A series circuit has three resistors each on different paths and connected to a 120 v battery. Resistor 1 has a resistance of 5. 0 ohms. Resistor 2 has a resistor of 7. 5 ohms and resistor 3 has a resistance of 9. 5 ohms
Answers
The total voltage drop across all resistors is equal to the battery voltage, which is 120 V. The formula to calculate the total resistance in a series circuit is: Rtotal = R₁ + R₂ + R₃
Rtotal = R₁ + R₂ + R₃
Rtotal = 5.0 + 7.5 + 9.5
Rtotal = 22.0 ohms
The total resistance in the circuit is 22.0 ohms.
The formula to calculate the total current in a series circuit is:
I = Vtotal / RtotalI
= 120 / 22.0I
= 5.45 A
The total current in the circuit is 5.45 A.
The formula to calculate the voltage drop across each resistor is:
V = IRV₁
= 5.45 A × 5.0 ohms
= 27.3 VV₂
= 5.45 A × 7.5 ohms
= 40.9 VV₃
= 5.45 A × 9.5 ohms
= 51.8 V
The voltage drop across resistor 1 is 27.3 V.
The voltage drop across resistor 2 is 40.9 V.
The voltage drop across resistor 3 is 51.8 V.
The total voltage drop across all resistors is equal to the battery voltage, which is 120 V.
Therefore, 27.3 V + 40.9 V + 51.8 V
= 120 V.
The total voltage drop across all resistors is equal to the battery voltage, which is 120 V.
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The law of __________________________ says that people think of similar objects as belonging together.
Answers
Answer:
Explanation:is the law means that the police are the law
What is the relationship between kinetic and potential energy in a roller coaster.
Answers
Answer: Kinetic energy is energy that an object has as a result of its motion. Potential energy is stored energy that has not yet been released.
Explanation: All moving objects possess kinetic energy, which is determined by the mass and speed of the object. Potential energy is the energy an object has as a result of its position.
An object has more elastic potential energy if...
Answers
In a Young's double-slit experiment, a set of parallel slits with a separation of 0.102 mm is illuminated by light having a wavelength of 575 nm and the interference pattern observed on a screen 3.50 m from the slits.(a) What is the difference in path lengths from the two slits to the location of a second order bright fringe on the screen?(b) What is the difference in path lengths from the two slits to the location of the second dark fringe on the screen, away from the center of the pattern?
Answers
Answer:
Rounded to three significant figures:
(a) \(2 \times 575\; \rm nm = 1150\; \rm nm = 1.15\times 10^{-6}\; \rm m\).
(b) \(\displaystyle \left(1 + \frac{1}{2}\right) \times (575\;\rm nm) \approx 863\; \rm nm = 8.63\times 10^{-7}\; \rm m\).
Explanation:
Consider a double-slit experiment where a wide beam of monochromatic light arrives at a filter with a double slit. On the other side of the filter, the two slits will appear like two point light sources that are in phase with each other. For each point on the screen, "path" refers to the length of the segment joining that point and each of the two slits. "Path difference" will thus refer to the difference between these two lengths.
Let \(k\) denote a natural number (\(k \in \left\lbrace0,\, 1,\, 2,\, \dots\right\rbrace\).) In a double-split experiment of a monochromatic light:
A maximum (a bright fringe) is produced when light from the two slits arrive while they were in-phase. That happens when the path difference is an integer multiple of wavelength. That is: \(\text{Path difference} = k\, \lambda\).Similarly, a minimum (a dark fringe) is produced when light from the two slits arrive out of phase by exactly one-half of the cycle. For example, The first wave would be at peak while the second would be at a crest when they arrive at the screen. That happens when the path difference is an integer multiple of wavelength plus one-half of the wavelength: \(\displaystyle \text{Path difference} = \left(k + \frac{1}{2}\right)\cdot \lambda\).MaximaThe path difference is at a minimum (zero) at the center of the screen between the two slits. That's the position of the first maximum- the central maximum, a bright fringe where \(k = 0\) in \(\text{Path difference} = 0\).
The path difference increases while moving on the screen away from the center. The first order maximum is at \(k = 1\) where \(\text{Path difference} = \lambda\).
Similarly, the second order maximum is at \(k = 2\) where \(\text{Path difference} = 2\, \lambda\). For the light in this question, at the second order maximum: \(\text{Path difference} = 2\, \lambda = 2 \times 575\; \rm nm = 1.15\times 10^{-6}\; \rm m\).
Central maximum: \(k = 0\), such that \(\text{Path difference} = 0\).First maximum: \(k = 1\), such that \(\text{Path difference} = \lambda\).Second maximum: \(k = 2\), such that \(\text{Path difference} = 2\, \lambda\).MinimaThe dark fringe closest to the center of the screen is the first minimum. \(\displaystyle \text{Path difference} = \left(0 + \frac{1}{2}\right)\cdot \lambda = \frac{1}{2}\, \lambda\) at that point.
Add one wavelength to that path difference gives another dark fringe- the second minimum. \(\displaystyle \text{Path difference} = \left(1 + \frac{1}{2}\right)\cdot \lambda\) at that point.
First minimum: \(k =0\), such that \(\displaystyle \text{Path difference} = \frac{1}{2}\, \lambda\).Second minimum: \(k =1\), such that \(\displaystyle \text{Path difference} = \left(1 + \frac{1}{2}\right)\cdot \lambda\).For the light in this question, at the second order minimum: \(\displaystyle \text{Path difference} = \left(1 + \frac{1}{2}\right)\cdot \lambda = \left(1 + \frac{1}{2}\right)\times (575\; \rm nm) \approx 8.63\times 10^{-7}\; \rm m\).
What is the maximum power that can be delivered by a 1.9- cm -diameter laser beam propagating through air
Answers
The maximum power that can be delivered by a 1.9-cm-diameter laser beam propagating through air depends on a variety of factors, such as the wavelength of the laser, the distance it travels through the air, and the atmospheric conditions. Generally, the maximum power that can be delivered is limited by the amount of energy that the air can absorb before it becomes ionized and creates a plasma. This limit is known as the critical power density, and it varies depending on the atmospheric conditions. In general, the critical power density for air is around 10^12 watts per square centimeter.
So, if we assume that the laser beam has a uniform intensity profile, the maximum power that can be delivered by a 1.9-cm-diameter laser beam propagating through air is approximately 1.7 megawatts.
However, it's important to note that this is just an estimate and the actual maximum power will depend on many factors that are difficult to predict with precision.
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What is the period of a rotating object if it spins 24 times in 13 seconds?
Answers
Answer:
The period is 0.54 seconds
Explanation:
Period (T)
Is the time required for a rotating object to make one complete revolution around a circular path.
If it takes a time t to complete n revolutions, the period is:
\(\displaystyle T=\frac{t}{n}\)
The rotating object spins n=24 times in t=13 seconds, thus its period is:
\(\displaystyle T=\frac{13}{24}\)
T = 0.54 sec
The period is 0.54 seconds
What information does a distance time graph provide
Answers
Hope this helps
Please Help!!!
The earth has a mass of 5.98 × 10^24 kg and the moon has a mass of 7.35 × 10^22 kg. The distance from the centre of the moon to the centre of the earth is 3.84 × 10^8 m. A rocket with a total mass of 1200 kg is 3.0 × 10^8 m from the centre of the earth and directly in between the earth and the moon. Find the net gravitational force on the rocket from the earth and moon.
Answers
Answer: 4.486N
Explanation:
The Gravitational force of attraction 'F' between two masses m1 and m2 is given by:
F= Gm1m2 / r^2
Where ; r = distance between the bodies
G = gravitational constant = 6.67 × 10^-11
The mass of the earth (m1) = 5.98 × 10^24 kg
Mass of the moon (m2) = 7.35 × 10^22 kg
Mass of rocket (m3) = 1200 kg
the net gravitational force on the rocket from the earth and moon equals
Difference in the gravitational force between the earth and rocket and that exerted between th e moon and rocket.
Net F = (Gm1m3 / r^2) - (Gm2m3) /r^2
Net F = Fa - Fb
Fa = Gm1m3 / r^2 =
(6.67 × 10^-11 × 5.98 × 10^24 × 1200) /(3 × 10^8)^2
(6.67×5.8×1200)/ 9 × 10^(-11 + 24 - 16)
= 5318 × 10^-3 = 5.32N
Fb = Gm2m3 / r^2 =
r = (3.84 × 10^8 - 3.0×10^8) = 0.84 × 10^8
(6.67 × 10^-11 × 7.35 × 10^22 × 1200) /(8.4× 10^7)^2
(6.67×7.35×1.2)/ 70.56 × 10^(-11 + 22 + 3 - 14)
= 0.83375N
Fnet = 5.32N - 0.83375N = 4.48625N
= 4.486N
how do you think the weight and the lift should not be one of the same magnitude
Answers
because weight disappear and doesn't show the actual weight in the lift
I need help with question 3 you don’t have to explain it I just need the answers thank you.
Answers
Weight of the bag of sugar on the moon = 3.34 N
Weight of the bag of sugar on Venus = 18.09 N
Mass of the bag of sugar on the Earth = 2.04 kg
Mass of the bag of sugar on the moon = 2.04 kg
Mass of the bag of sugar on venus = 2.04 kg
Explanation:The weight of the object on the earth
\(\begin{gathered} W_E=4.50\text{ lb} \\ 1\text{ lb = }4.45\text{ N} \\ W_E=4.50\text{ }\times4.45 \\ W_E=20.03N \end{gathered}\)The acceleration due to gravity on the earth:
\(g_E=9.81m/s^2\)\(\begin{gathered} W_E=m_Eg_E_{} \\ 20.03=m_E\times9.81 \\ m_E=\frac{20.03}{9.81} \\ m_E=2.04\operatorname{kg} \end{gathered}\)The mass of the bag of sugar on the earth = 2.04 kg
Note that the mass of the sugar is the same everywhere
Acceleration due to gravity on the moon is one-sixth of acceleration due to gravity on the earth
\(\begin{gathered} g_m=\frac{1}{6}g_E \\ g_m=\frac{1}{6}(9.81) \\ g_m=1.635 \end{gathered}\)The weight of the bag of sugar on the moon is:
\(\begin{gathered} W_m_{}=m_mg_m_{} \\ W_m=2.04\times1.635 \\ W_m=3.34N \end{gathered}\)The acceleration due to gravity on the Venus is 0.904 times that of the earth
\(\begin{gathered} g_v=0.904g_E \\ g_v=0.904(9.81) \\ g_v=8.87m/s^2 \end{gathered}\)The weight of the bag of sugar on the venus is:
\(\begin{gathered} W_v=m_vg_v \\ W_v=2.04(8.87) \\ W_v=18.09\text{ N} \end{gathered}\)Mass of the bag of sugar on the Earth = 2.04 kg
Mass of the bag of sugar on the moon = 2.04 kg
Mass of the bag of sugar on venus = 2.04 kg
please help!!!!!!!!!!
Answers
Answer:
C
Explanation:
three bricks means 3 times the weight, so 6/3=2
Examine the diagram of the cell cycle.
Which label identifies the stage in which the DNA is
copied and the cell grows?
Y
Z
Ow
OX
X
O z
W
Answers
Answer:
W
Explanation:
its the longest period of time
is parabolic mirror used for finiding out the intensity of light?
Answers
The correct answer is :
Mirror Parabola A mirror with a parabola-shaped reflecting surface is referred to as a parabolic mirror. The mirror is employed in search lights because it can precisely converge a broad parallel beam of light at the focus. Therefore, even at a great distance, the intensity of the reflected beam is unaffected.
Parabolic In search lights, concave mirrors with sizable apertures are utilized. For searching items in search light, we require a powerful parallel beam of light. The reflected rays from an object placed at a concave mirror's focus are parallel to one another and likewise parallel to the main axis. So, we position a light source at the concave mirror's focal point.
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what electrical unit refers to the number of electrons moving through a circuit per second?
Answers
The electrical unit that refers to the number of electrons moving through a circuit per second is called amperes, also known as amps.
An ampere measures the rate at which electric current flows through a circuit, and is defined as the amount of charge passing through a point in one second when a steady current of one coulomb flows through the circuit. The symbol for amperes is "A".
One Ampere is equal to the flow of one Coulomb of charge per second. It is an essential parameter in understanding and analyzing electrical circuits and plays a crucial role in various electrical applications. Remember to always exercise caution when working with electrical circuits to ensure safety.
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Instead of using a furnace to heat a room, a propane heater could be used. If the room starts at 20 degrees Celsius and someone turns on the propane heater and leaves, plot the temperature of the room over time.
Answers
The temperature would gradually increase after it is turned on. The rate of increase would depend on the power of the heater and the size of the room. Once the desired temperature is reached, the heater would automatically turn off to maintain the temperature.
If a propane heater is used instead of a furnace to heat a room that starts at 20 degrees Celsius, the temperature of the room would depend on various factors such as the size of the room, the insulation, and the power of the heater. Generally, a propane heater would provide heat more quickly than a furnace as it heats up faster. However, it also tends to heat up the immediate area around it more quickly, resulting in uneven heating in the room.
Assuming the propane heater is powerful enough to heat the entire room evenly, the temperature would gradually increase after it is turned on. The rate of increase would depend on the power of the heater and the size of the room. Once the desired temperature is reached, the heater would automatically turn off to maintain the temperature.
If the person who turned on the propane heater leaves the room, the temperature would continue to rise until it reaches the desired temperature. However, if the room is poorly insulated or there are drafts, the temperature may not reach the desired level or it may fluctuate. It is important to monitor the temperature regularly and adjust the heater as needed to maintain a comfortable and safe temperature.
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how many basic forces are there in the universe?
Answers
Answer:
Four basic fources.
Explanation:
Fundamental force, also called fundamental interaction, in physics, any of the four basic forces—gravitational, electromagnetic, strong, and weak—that govern how objects or particles interact and how certain particles decay. All the known forces of nature can be traced to these fundamental forces.
starting from rest, a car accelerates to 45 m/s in 1 minute. what is the average acceleration of the car in m/s^2 ?
Answers
Answer:
given us,
initial velocity (u)= 45m/s
time(t)= 1 min
final velocity (v)=?
here,
average acceleration = v-u/t
= v- 45/1
v= 45/1
:. v=45m/s
:. the average acceleration of the car in m/s^2 is 45m/s
Explanation:
we can use acceleration formula
UVA and UVB rays can cause skin damage and skin cancer. True False
Answers
Answer:
true
Explanation:
they can cause skin damage
Why do we see? Explain
Answers
Answer:
we see to make things visible . if we don't see then we can not give the scene around us. on the way if we close our eyes will we can we home from different types of vehicles .
Explanation:
thank you Mark as a brainlist
A 1610 kg car is traveling east at 22. m/s and a 3100. kg minivan traveling west at a speed of 11.0 m/s
collide head on. Assuming a completely inelastic collision, what is the velocity in m/s of the “connected”
vehicle after the crash?
Answers
Answer:
Im pretty sure its 11 m/s east because it is 22 m/s hitting 11 m/s and the force is harder hitting
Explanation:
im not 100% sure becasue i did this stuff a while ago
What are the connections between Fahrenheit 451 and today's society?
Answers
The novel Fahrenheit 451 is still relevant in modern society due to the numerous parallels that can be drawn between the book and today's world.Fahrenheit 451 can be seen as a cautionary tale, warning against the dangers of authoritarianism and the suppression of intellectual curiosity.
Fahrenheit 451, which was published in 1953, is a novel set in a dystopian society where books are banned and "firemen" burn any that are discovered. Guy Montag, the protagonist, is a fireman who becomes disillusioned with his job and begins to question the society he lives in. Fahrenheit 451 examines the theme of censorship, and the dangers of a society that is not allowed to think critically or express themselves freely.
There are many connections between Fahrenheit 451 and today's society. For instance, censorship, one of the major themes of the book, is still a major issue in today's society. In the novel, books are banned because they promote critical thinking and questioning of authority, something that the government in the book does not want. In today's world, books are still banned, and people are still persecuted for their ideas. Furthermore, the prioritization of technology over human interaction and knowledge is another issue that is still prevalent today. In Fahrenheit 451, people are constantly plugged in to their "seashell" radios and televisions, and the government uses technology to control the population. Similarly, in today's world, technology has become a central part of our lives, and many people are addicted to their phones, computers, and other devices. This has led to a decline in human interaction and a decrease in critical thinking and intellectual curiosity.
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How does the heat transfer (a change in temperature) that occurs through ocean currents affect the land?
Answers
Answer:
Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface. Without currents in the ocean, regional temperatures would be more extreme—super hot at the equator and frigid toward the poles—and much less of Earth's land would be habitable.
Vera and her three sisters received the same amount of money to go to the school festival. Each girl spent $12. Afterward, the girls had $24 altogether. determine the amount of money each girl recived
Answers
Answer:
$18
Explanation:
Each of the was qiven $18
All together =24
24 divide it by 4 (because there were 4 people there)
= 6 (6+6+6+6)
= 24
=6+12=18
.Hence each of them was given $18
Answer:
4(m−12)=24
4m-48=24
4m= 24+48
4m=72
m=18
Explanation:
it correct i did it on my school work and get an A+
What is the expression for the magnitude of the electric field in the upper right corner of the square (at the location of q)? (use the following as necessary: q, a, and ke.) e =
Answers
The expression for the magnitude of the electric field in the upper right corner of the square, at the location of q, can be given as follows: e = \(k_e\)* q /\(r^2\), where \(k_e\) is the electrostatic constant, q is the charge, and r is the distance between the charge q and the upper right corner of the square.
In this expression, \(k_e\) represents the constant of proportionality, also known as Coulomb's constant, and it is equal to approximately 8.988 × \(10^9 N m^2/C^2\). The charge q represents the magnitude of the charge at the location of interest. The distance r is the distance between the charge q and the upper right corner of the square. The expression uses the inverse square law, which states that the magnitude of the electric field decreases with the square of the distance.
By plugging in the appropriate values for \(k_e\), q, and r into the expression, you can calculate the magnitude of the electric field in the upper right corner of the square.
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<The question is incomplete, so this is the general answer>
A spaceship has a mass of 9000 kg. The spaceship is launched from Earth and lands on a distant planet where it has a weight of 390000 N. What is the acceleration of gravity on this planet?
Answers
9000 g = 390,000
g = 390/9 = 43.3 m/s^2
The acceleration of gravity on the planet where the spaceship is located is 43.3m/s²
HOW TO CALCULATE ACCELERATION:
The acceleration due to gravity of a body can be calculated by dividing the weight of the body by the mass. That is:acceleration (m/s²) = weight (N) ÷ mass (kg). According to this question, a spaceship has a mass of 9000 kg but when launched from Earth to a distant planet, it has a weight of 390000 N. The acceleration of gravity is as follows:Acceleration = 390000N ÷ 9000kgAcceleration = 43.3m/s²Therefore, the acceleration of gravity on the planet where the spaceship is located is 43.3m/s²Learn more at: https://brainly.com/question/21775164?referrer=searchResults
True or false: the period of a pendulum clock decreases if you increase the length of the pendulum.
Answers
It is false. The period of a pendulum clock increases if you increase the length of the pendulum.
The time period of a pendulum clock is directly proportional to the square root of the length.
The formula of the time period of a simple pendulum is:
T = 2π√(l/g)
According to the formula, time period T is directly proportional to the square root of length and inversely proportional to gravity. The time period will increase if we increase the length of the pendulum clock.
For example, the time period will increase by two times if we increase the length of the pendulum by four times.
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False, the period of a pendulum clock does not decreases if you increase the length of the pendulum. Their variation is directly proportional.
The square root of the length of a simple pendulum determines its period in a direct proportion. In other words, as length grows, so does the amount of time.
The relationship between two values where their ratio equals a constant number is known as a direct proportion or direct variation. In our case, the two values are.
1. Square root of the length of the pendulum
2. Period of a pendulum
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