PLZ HURRY NEED HELP ASAP!!!!!!!!!!!!!!
Three components in a parallel circuit have individual resistances of r1, r2, and r3. What formula can you use to determine the total resistance of the circuit?
A. R=r1+r2+r3
B. R=1r1+1r2+1r3
C. 1R=r1+r2+r3
D. 1R=1r1+1r2+1r3
Answers
Answer:
D. 1R=1r1+1r2+1r3
Explanation:
If three components are arranged to form a parallel circuit, and the individual resistance of these components are r1, r2, and r3 respectively, the formula for finding the total resistance R is: 1R=1r1+1r2+1r3.
Related Questions
If the astronaut throws the 3.20 kg tool with an acceleration of 5.90 m/s2 , what is the magnitude of the acceleration a of the astronaut during the throw
Answers
The magnitude of the acceleration a of the astronaut during the throw of the 3.2 kg tool is determined as (18.88)/m.
Force applied to the toolBased on Newton's third law of motion, the force applied to the tool by the atronaut is equal to the force exerted on the astronaut by the tool.
Fa = - Fb
where;
Fa is force exterted by the astronautFb is force exterted by the toolFa = (3.2 x 5.9)
Fa = 18.88 N
Acceleration of the astronautFa = m x a
where;
m is mass of the astronauta is the acceleration of the astronauta = Fa/m
a = (18.88)/m
Thus, the magnitude of the acceleration a of the astronaut during the throw of the 3.2 kg tool is determined as (18.88)/m.
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Two rockets are being tested. Both rockets have the same mass. One rocket accelerates at a higher rate than another rocket. What could be true about the difference between the rockets?
a
One rocket is more streamlined than the other
b
One rocket engine produces more force than the other
c
One rocket is more badly designed than the other
d
One rocket has more fuel than the other
Answers
Answer: One rocket has more fuel than the other
Two rockets are being tested. Both rockets have the same mass. One rocket accelerates at a higher rate than another rocket. One rocket has more fuel than the other
What are the features of a rocket ?
A rocket is a special type of jet-propulsion device which carry either solid or liquid propellants and it provide both the fuel and oxidizer needed for combustion.
The rocket is commonly applied to various vehicles, including firework skyrockets, guided missiles, and launch vehicles applied in spaceflight..
The rocket is different from the turbojet and other “air-breathing” engines exhaust jet consists of the gaseous combustion products of “propellants” carried on board.
The physical principle involved in rocket propulsion was derived by Sir Isaac Newton. According to third law of motion, the rocket experiences an increase in momentum proportional to the momentum carried away in the exhaust,
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How does lower latency benefit the users connected to a network Mcq?.
Answers
Less latency benefits users connected to a network "by lowering the delay while sending and receiving data between devices." The right response is C.
The time it takes for data to be transferred and received between devices on a network is referred to as lower latency. When latency is minimal, there is less time between when a user initiates a request and when they receive a response, which makes the user experience more responsive and seamless. Fast reaction times are essential in applications like online gaming, video conferencing, and real-time control systems, therefore this is very significant. Faster data transport leads in a better user experience thanks to a low-latency network.
There should be several options for this question's response, including:
(A) by increasing the signal transmission range of the network.
(B) allowing several devices to connect to the network at once.
(C) by shortening the lag time between devices when sending and receiving data.
(E) by only allowing users with higher security credentials access to the network.
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In complete sentences describe the energy flow between the Sun, the Earth, and space
Answers
Explanation:
The amount of incoming energy from the Sun decides the weather and climate of earth. If the energy that is incoming and outgoing on the earth, then climate is in equilibrium. The balance is depending on the scattering, absorption, reflection and transformation of energy.
The energy from sun passes through space and reaches the earth’s surface. On reaching surface, the solar energy warms the atmosphere releasing heat energy which gets transferred throughout the planets system by radiation, conduction and convection. Conduction happens in the atmosphere within first several millimeters close to the surface. This heated air expands as it is dense and rises causing transfer of heat to atmosphere through convection process. It results in formation of clouds.
The radiant energy from sun is transmitted via space in form of invisible waves. But much of the suns radiant energy, is transmitted back to atmosphere. The objects on earth like land, plants, animals absorb radiant energy as heat of which one third gets re-radiated back to atmosphere that is absorbed by carbon dioxide and water vapor. The atmosphere radiates heat energy back to earth increasing the earth temperature. This trapping of radiation is greenhouse effect.
The thermal energy obtained by convection currents are responsible for wind, cloud formation, and weather formation. The hydrosphere that comprises of 70% of earth’s surface absorbs solar energy.
On the basis of the above explanation is:
The energy from the sun passes through space in the form of invisible waves to the earth surface. It heats up the earth’s surface causing variation in climate.
One year consists of 365 days. this is closest to how many seconds?
Answers
1 year has 365 days
1 day has 24 hours
Each hour has 60 minutes
And each minute has 60 seconds
The number of seconds in 365 days is 365x24x60x60 = 31536000
So there is 31536000 seconds in 1 year
Hope it helped you!!
If one year consists of 365 days, this is closest to x = 3.15 × 10⁷ seconds.
What is the number of seconds in a year?
Given that;
Number of days in a year = 365Number of seconds in 365 days = ?Note that; there are 24 hours in a day, 1440 minutes in a day and 86400 seconds in a days.
1 day contains 86400 seconds
365 contains x seconds
x = 365 × 86400
x = 3.15 × 10⁷ seconds
Therefore, if one year consists of 365 days, this is closest to x = 3.15 × 10⁷ seconds.
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the plane can remain on this trajectory for at most due to the large change in altitude required. if instead of simulating weightlessness, nasa wanted to fly a trajectory that would simulate the gravitational acceleration of mars, for what length of time can the plane simulate mars gravity? assume that the maximum change in altitude is the same for both trajectories, and that free fall acceleration on mars is as high as on earth. give your answer to the nearest second.
Answers
The question is to calculate the time of flight of a projectile of a plane on surface of Mars.
The projectile is an object which is launched at angle θ with the horizontal.
The projectile is launched with an initial velocity "u"
The path/trajectory of projectile is a parabola.
The maximum horizontal distance between the point of launching and the point of landing is defined as the range of projectile 'R'.
The maximum time taken by the projectile to be in air or to travel the complete trajectory is defined as the time of flight 'T'.
Both the time of flight and the range depend on the initial velocity and the angle of projection.
Also the two parameters depend on acceleration due to gravity 'g'.
It is mentioned that projectile has same maximum horizontal distance on the earth and Mars.
We have to calculate the time of flight on Mars.
The formula of time of flight T = 2 u sinθ / g
On the earth, g = 9.8 m/s²
The value of acceleration due to gravity on the surface of Mars =
1/3* acceleration due to gravity on the Earth.
Let g' is equal to acceleration due to gravity on Mars.
Then, g = g/3
The time of flight of projectile on the surface of mars T' = 2u sinθ/g
T' = 2u sinθ / (g/3)
T' = (2u sinθ*3)/g
T' = 6u sinθ / g
Therefore, the time of flight of projectile on mars is 6u sinθ / g.
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help me please
only if you really know
Answers
Assume R is measured in meters (m) and M in kilograms (kg). Then
R ² / (GM) = [m]² / ([N•m²/kg²] [kg]) = m•kg / N = m•kg / (kg•m/s²) = s²
so t ² is indeed proportional to R ²/(GM).
A car slows down from 65 km/s to 30 km/s in 5 seconds. What is its acceleration?
Answers
A 9.0V battery is connected across a 2.2kilo ohms and 6.8kilo omhs resistors connected in series. what is the potential differences across 2.2kilo ohms resistor.
Answers
Answer:
\(V_{2.2} =2.2V\)
Fast and loose: that's a classic voltage divider. the drop from the i-th resistor is \(R_i \over {\sum R}\) of the drop across the whole series. In our situation, it's \(2.2\cdot 10^3 \over {2.2\cdot10^3 + 6.8\cdot 10^3\) of 9 V. By plugging numbers in a calculator, it's 22/90 of 9V, or 2.2V
With Ohm's Law
The series is equivalent of a single resistor of Resistance \(2.2\cdot 10^3+6.8\cdot 10^3 \Omega = 9.0 k\Omega\). By Ohm's first Law (\(V=Ri\)) the current flowing through the resistor is \(9V = 9*10^3\Omega i \rightarrow i=1mA\). At this point, the drop across the first resistor is, again by Ohm's law\(V = 2.2 \cdot 10^3 \Omega \cdot 1\cdot 10^{-3} A = 2.2V\)
How do I get number of atoms?
Answers
Hi really need help with Earth Science hw!
Answers
Answer:
In essence, everything is fine. I don't know about the 9th one though.
Force (N) = 250
Mass (kg) = 221
Acceleration (m/s^2) = ?
Answers
Answer:
The required acceleration is \(a=1.1\) m/s²
Explanation:
Given
Force F = 250 NMass m = 221 kgTo determine
Acceleration a = ?
We know that acceleration is produced when a force is applied to a body.
The acceleration can be determined using the formula
\(F = ma\)
where
F is the force m is the mass a is the accelerationnow substituting F = 250 , and m = 221 in the formula
\(F = ma\)
\(250 = 221 (a)\)
switch the equation
\(221(a) = 250\)
Divide both sides by 221
\(\frac{221a}{221}=\frac{250}{221}\)
simplify
\(a=\frac{250}{221}\)
\(a=1.1\) m/s²
Therefore, the required acceleration is \(a=1.1\) m/s²
if 162.4 j of heat are added to a gas contained within a cylinder and the gas expands, doing 87.3 j of work, what is the change in internal energy of the system?
Answers
The changes in internal energy of the system 75.1 J.
The internal energy of a thermodynamic system is the total energy contained in it. It is the energy required to create or prepare a system in a given internal state and includes contributions of potential energy and internal kinetic energy.
Calculation:
Internal energy = 162.4 j - work done
= 162.4 j - 87.3 j
= 75.1 J
Internal energy, in thermodynamics, is the property or state function that defines the energy of matter in the absence of capillary action or external electric, magnetic, or other fields.
Internal energy is the microscopic energy contained in the matter given by the random and disordered kinetic energy of the molecules. It also includes the potential energy between these molecules and the nuclear energy contained in the atoms of these molecules.
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Fighter jets on aircraft carriers are accelerated down a 270 foot "runway" in two seconds when they are taking off. A fully loaded, combat ready F-15 has a maximum take-off weight of 62,000 pounds. To ensure the pilot can reach sufficient velocity within 2 seconds a pneumatic cannon propels the plane down the runway. If this same cannon was used to launch your Toyota Corolla (mass is 2646lbs), how fast in miles per hour would you be going after reaching the end of the runway?
Answers
The speed of the Toyota Corolla would have been 143.9 mph.
What is the acceleration of the F-15?
The acceleration of the F-15 can be calculated as follows:
Acceleration = Velocity Change / Time = (Take-off Speed) / Time
where;
Take-off Speed = √(2dg /t²)
Take-off Speed = √(2 x (270 ft) x 32.2 ft/s² / (2 s)²)
T = √(17496) = 131.6 ft/s
Acceleration = Velocity Change / Time
= (131.6 ft/s) / (2 s) = 65.8 ft/s²
We can use the same acceleration to launch the Toyota Corolla, and calculate its final velocity:
Final Velocity = Initial Velocity + Acceleration x Time
where;
Initial Velocity = 0 (because the car is not moving initially), Time = 2 sFinal Velocity = 0 + (65.8 ft/s²) * (2 s) = 131.6 ft/s
Finally, we can convert the velocity from feet per second to miles per hour:
Velocity (mph) = Velocity (ft/s) x (1 hour/3600 s) x (5280 ft/mile)
= 131.6 ft/s x (1 hour/3600 s) x (5280 ft/mile)
= 143.9 mph
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Train car A is at rest when it is hit by train car B. The two cars, which have the same mass, stick together and move off after the collision. How does the final velocity of train cars A and B after the collision compare to the initial velocity of train car B before the collision? The final velocity is double train car B’s initial velocity. The final velocity is the same as train car B’s initial velocity. The final velocity is half of train car B’s initial velocity. The final velocity is zero, since train car B will stop.
Answers
Answer:C The final velocity is half of trained car B's initial velocity.
Explanation:
Answer: C i just got it right on e d g e n u i t y :)
Explanation:
hat is the speed of a water wave of frequency 2 hz and wavelength 1.0 m ?
Answers
The speed of a water wave can be determined by multiplying the frequency by the wavelength.
Therefore, the speed of a water wave with a frequency of 2 Hz and a wavelength of 1.0 m is 2 m/s. This is because frequency is the number of complete waves that pass a given point in one second, and wavelength is the distance between two consecutive crests or troughs of a wave.
By multiplying these two values, we can calculate the speed of the wave. In this case, the wave travels at a speed of 2 meters per second. It is important to note that the speed of a wave depends on the properties of the medium through which it travels. Water waves, for example, travel at different speeds depending on factors such as the depth of the water, the temperature, and the salinity of the water.
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a man of mass 60 60 kg, runs up the stairs of total height 5 5 meters in 4 4 seconds. how much power is exerted by the man?
Answers
The power exerted by the man is 735 watts.
To find the power exerted by the man, we need to use the formula for power, which is:
Power = Work / Time
Work is the product of force and displacement, so we can write the formula as:
Power = (Force × Displacement) / Time
We know that the displacement is 5 meters and the time is 4 seconds. To find the force, we need to use the formula for weight, which is:
Weight = Mass × Acceleration
The acceleration in this case is the acceleration due to gravity, which is 9.8 m/s². So the weight of the man is:
Weight = 60 kg × 9.8 m/s² = 588 N
Now we can plug in the values into the formula for power:
Power = (588 N × 5 m) / 4 s = 735 Nm/s = 735 W
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A 1 023-kg satellite orbits the Earth at a constant altitude of 96-km. (a) How much energy must be added to the system to move the satellite into a circular orbit with altitude 199 km? How is the total energy of an object in circular orbit related to the potential energy? MJ (b) What is the change in the system's kinetic energy? MJ (c) What is the change in the system's potential energy? MJ
Answers
a) The change in potential energy \(($\Delta PE$) is 1,027,884,600 J.\)
b) The change in kinetic energy is 0 MJ.
c) The change in potential energy is equal to the magnitude of the change in kinetic energy.
What is potential energy and kinetic energy?
Potential energy and kinetic energy are both forms of energy associated with the motion or position of an object.
Potential energy refers to the energy that an object possesses due to its position or state. It is the energy that is stored within an object or a system and has the potential to be converted into other forms of energy kinetic energy, on the other hand, is the energy possessed by an object due to its motion. It is defined as the energy of an object in motion and is dependent on both its mass and velocity
(a) To move the satellite into a circular orbit with altitude 199 km, we need to calculate the change in potential energy. The potential energy of an object in a circular orbit is directly related to its altitude. The formula to calculate the potential energy is given by:
\(\[PE = mgh\]\)
where \(\(PE\)\) is the potential energy,m is the mass of the satellite, g is the acceleration due to gravity, and h is the altitude.
The change in potential energy can be calculated as:
\(\[\Delta PE = PE_f - PE_i\]\)
where \(\(\Delta PE\)\) is the change in potential energy, \(\(PE_f\)\) is the final potential energy (199 km altitude), and \(\(PE_i\)\) is the initial potential energy (96 km altitude).
\(Given:\\Mass of the satellite (\(m\)) = 1 023 kg\\Initial altitude (\(h_i\)) = 96 km\\\\Final altitude (\(h_f\)) = 199 km\)
The change in potential energy can be calculated as follows:
\(\[\Delta PE = mgh_f - mgh_i\]\)
Substituting the given values:
\(\[\Delta PE = (1 023 \, \text{kg})(9.8 \, \text{m/s}^2)(199 000 \, \text{m}) - (1 023 \, \text{kg})(9.8 \, \text{m/s}^2)(96 000 \, \text{m})\]\)
Evaluating the expression, we find:
\(\[\Delta PE = 2,006,254,200 \, \text{J} - 978,369,600 \, \text{J}\]\)
\(\[\Delta PE = 1,027,884,600 \, \text{J}\]\)
Therefore, the change in potential energy \(($\Delta PE$) is 1,027,884,600 J.\)
(b) The change in the system's kinetic energy is zero since the satellite remains at a constant altitude. Therefore, the change in kinetic energy is 0 MJ.
(c) The change in the system's potential energy was calculated in part (a). The change in potential energy is also equal to the negative of the change in kinetic energy. Therefore, the change in potential energy is equal to the magnitude of the change in kinetic energy.
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Helppppppppppppppppppp
Answers
Answer:
100 million step
Explanation:
wish it will help u
Charge is given in microcoulombs. What must you multiply the charge by to use Coulomb's
law to calculate the electric force?
O
A. 10-6
O
B. 10-3
C. 106
D. 103
NEED ANSWER NOW
NO LINK
Answers
Answer:
Option A. 10¯⁶
Explanation:
To know which option is correct, we must bear in mind, the relationship between micro coulomb (μC) and coulomb (C). This is given below:
Recall:
1 μC = 10¯⁶ C
Therefore, to convert micro coulomb (μC) to coulomb (C), multiply the value given in micro coulomb (μC) by 10¯⁶.
Thus, option A gives the correct answer to the question.
As a wave links of electromagnetic waves increase the frequencies ____ for waves moving in a ____
Answers
your question seems incomplete, I think you are asking the question which is given below.
Question: As the frequency of electromagnetic waves increases, what happens to the wavelength?
when the frequency of an electromagnetic wave increases, its wavelength would decrease, according to eq (i).
speed of light = frequency X wavelength ............(i)
as the speed of light is constant in the same medium.
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A neutron star is moving in outer space at 4,000 km/hr. What happened to the star that set it in motion on it's current course?
a
the friction in space slowed it down to 4,000 km/hr
b
an unbalanced force from a supernova set it in motion
c
it was shot further into space due to the velocity of objects around it
d
a balanced force acted on it and propelled it to 4,000 km/hr
Answers
Answer:
d
a balanced force acted on it and propelled it to 4,000 km/hr
Explanation:
For the neutrons star which is moving in outer space at 4,000 km/hr, it could only be possible as a result of the balanced force which had already acted on it. This is based on newton's law of motion which states that 'To every action, there is equal and opposite reaction'.
The lawnmower weights 300N, what is total down force on the ground
Answers
Which of the following is NOT a negative effect of the way we use science? A. Climate Change B. Pollution C. Overuse of resources D. Damage to the sun
Answers
Answer:
D
Explanation:
Damage to the sun is not a negative effect of the way we use science because we can't affect the sun due to its long distance from us.
How we negatively affected environment with the use of science?Humans negatively affected environment by using science because with the help of science we made new technologies which leads to Climate Change, Pollution and Overuse of resources.
So we can conclude that option D is the right answer.
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What is the total resistance of a 6 ohm and a 8 ohm resistor connected in series?
(1 Point)
Answers
Answer:
Total Resistance in circuit is Fourteen Ohms (14 Ω).
Explanation:
How do we know, if the resistors are connected in series, the total resistance is the sum of all the resistors.
(Important: The total resistance can only be added just when the resistors are connected in series)
Then, total resistance (TR ) is the sum of all resistors (T1 + T2, in this case)
TR = T1 + T2
According to problem data, we have:
TR = 8 Ω + 6 Ω
TR = 14 Ω
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You start walking from a point on a circular field of radius 0.5 km and 1 hour later
you are at the same point. What is your average speed for the whole journey?
Answers
Answer:
1). average velocity= displacement/time
= here displacement is zero
= 0/1
= 0 m/s
2). average speed= total distance/time
=2πr/1
=(2×22/7×5/10)/1
22/7
3.14 km/h
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Explanation:
Answer:
\(\sf \fbox{speed = 3.14 kmph}\)
Explanation:
Given:
Radius of circular field (r) = 0.5 Km
Time taken to complete one round of field (t)= 1 hour
To find:
Average speed for the whole journey=?
Solution:
To find the average speed we will have to find the actual distance covered in given time, & the actual distance covered would be equal to the
\( \sf \: perimeter \: of \: circular \: field = 2 \pi r \\ \sf 2 \pi r = 2 \times 3.14 \times 0.5 = 3.14 \: km\)
Distance covered in 1 hour is 3.14 km,
\(\small \sf Average \: speed = \frac{Distance}{Time} = \frac{3.14}{1} \\ \small \sf \fbox{speed = 3.14 kmph}\)
\( \small\sf \: Thanks \: for \: joining \: brainly \: community! \)
The diagram below shows some waves traveling along a rope.
State the type of waves travelling on the rope.
Explain how you can tell. *
(2 points)
Answers
-- Well first of all, the waves are transverse waves. The fibers in the rope, and the hand that generates the waves, are moving up and down, but the wave is moving to the right, towards the wall. These directions are perpendicular.
-- Later on, after the waves reflect from the wall and travel back toward the hand, there are going to be standing waves on the rope. But this is probably beyond the scope of the question.
A charge of 6.5 x 10-5 C is attracted by another charge with a force of 250 N when
they are separated by 0.15 m. Find the magnitude of the other charge.
8.65 X 105 C
9.62 × 10-2 C
6.15 x 10-6 C
O 9.62 x 10 c
Answers
Answer:
We can use Coulomb's law to solve this problem:
F = k * q1 * q2 / r^2
where F is the force between the two charges, k is Coulomb's constant (k = 9 x 10^9 N m^2 / C^2), q1 and q2 are the magnitudes of the charges, and r is the distance between them.
We know the force F, the distance r, and the magnitude of one of the charges q1. We can rearrange the equation to solve for the magnitude of the other charge q2:
q2 = F * r^2 / (k * q1)
Substituting the values we have:
q2 = (250 N) * (0.15 m)^2 / (9 x 10^9 N m^2 / C^2 * 6.5 x 10^-5 C)
Simplifying:
q2 = 8.65 x 10^5 C
Therefore, the magnitude of the other charge is 8.65 x 10^5 C.
Can two vectors of an unequal magnitude add up to give a vector with a magnitude of zero?
Answers
(a) A rectangular gasoline tank can hold 38. 0 kg of gasoline when full. What is the depth of the tank if it is 0. 400 m wide by 0. 900 m long? FYI, the table of densities in the textbook refers to gasoline as "petrol"
Answers
Answer:
ρ = .68 g / cm^3 = 680 kg / m^3 for gasoline
M = ρ V = 38 kg
V = 38 kg / 680 kg/m^3 = .056 m^3
.4 * .6 * D = .056 m^3
D = .23 m