Question 7: The circuit below consists of two 20 resistors connected in parallel to a 30 V
battery.
3.0 A
A
30. V
20. Ω
20.22
7. What would be the effect of adding a third 20 resistor in parallel?
A. The total current would remain the same
B. Whether the total current would increase, decrease, or remain the same cannot be
determined.
C. The total current would increase
D. The total current would decrease
Justification:
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Related Questions
who agree?? with this
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Explanation:
ME!!!!!!!!!!!!!!!!!!
Answer:
I Fully Agree with this becoz it is only the key...
Do u agree?
A sports car starts at rest at the starting marker then picks up speed, then passes the finish marker in 4.1 seconds. The markers are separated by 120 meters. What is the car's speed at the second marker?
Answers
Answer:
S=29.298m/s
Explanation:
Use S=d/t
So, S=120m/4.1s= 29.298m/s
what do we mean by the star-gas-star cycle? group of answer choices it is the continuous recycling of gas in the galactic disk between stars and the interstellar medium it is the idea that stars in close binary systems can exchange gas with one another it describes the orbits of the stars and interstellar medium around the center of the galaxy it is the nuclear process by which heavy elements are produced in massive stars
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The star-gas-star cycle refers to the continuous recycling of gas in the galactic disk between stars and the interstellar medium.
This process involves the formation of new stars from gas clouds, the fusion of hydrogen in stars to form heavier elements, and the release of gas and material back into the interstellar medium through stellar winds and supernova explosions. Essentially, the cycle involves the conversion of gas into stars, the life cycle of those stars, and the return of material back into the interstellar medium to eventually form new stars again.
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Which statement is true regarding the circuit schematic below?
A.
The resistor is connected near the negative terminal of the battery.
B.
At the present time, the circuit is complete.
C.
This is a direct current circuit.
D.
This is an alternating current circuit.
Answers
C. This is a direct current
What is schematic Current?An electrical schematic is a diagram that shows how all of the wires and components in an electronic circuit are connected.
The ability to read electrical schematics is a really useful skill to have. To start developing your schematic reading abilities,
it’s important to memorize the most common schematic symbols.
Each physical component (i.e resistor, capacitor, transistor) has a unique schematic symbol.
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________ probability requires that you count the frequency that an event occurs through an experiment and calculate the probability from the experiment's relative frequency distribution.
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Empirical probability requires that you count the frequency that an event occurs through an experiment and calculate the probability from the experiment's relative frequency distribution.
Empirical probability, also known as experimental probability, requires counting the frequency that an event occurs through an experiment and calculating the probability from the experiment's relative frequency distribution. It is based on observed data and can be used when conducting experiments or collecting real-world data.
To calculate the empirical probability of an event, you would divide the number of times the event occurred by the total number of trials or observations. This gives you the relative frequency of the event, which can be interpreted as an estimate of the probability.
Empirical probability is particularly useful when dealing with situations where theoretical probabilities are difficult to determine or when there is limited information available. By conducting experiments and collecting data, empirical probability allows for an estimation of the likelihood of an event based on observed frequencies.
It's important to note that as the number of trials or observations increases, the empirical probability tends to converge toward the theoretical probability. This concept is known as the law of large numbers, which states that as the sample size increases, the relative frequency of an event approaches its actual probability.
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Between 1992 and today, astronomers using large telescopes have discovered many icy pieces that orbit in the same region as the orbit of Pluto. These are believed to be members of the
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Icy pieces that orbit in the same region as the orbit of Pluto are believed to be members of the Kuiper belt.
What is the Kuiper belt?The Kuiper belt is a shape-disc formation in the solar system observed from Neptune and more away from our sun.
The Kuiper belt consists of different celestial bodies including among others icy pieces, planets, and comets.
In conclusion, icy pieces that orbit in the same region as the orbit of Pluto are believed to be members of the Kuiper belt.
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Which grouping describes only the living part of an ecosystem?
A. environment
B .niche
C. community
D. habitat
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Water comes of a tap of cross-sectional area 1.5 cm². After falling a vertical distance of 6.0 cm, the cros sectional area of the water column was found to have reduced to 0.45 cm². Calculate the speed of the water as it exited the tap.
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The speed of the water as it exits the tap is approximately 1.89 m/s.
What is the speed of the water as it exited the tap?We can use the principle of conservation of mass and energy to solve this problem. Assuming that the water is incompressible and the flow is steady, the mass flow rate of water at the tap is constant. Therefore, the mass flow rate at the tap is equal to the mass flow rate at the exit:
ρ1A1v1 = ρ2A2v2
where:
ρ1 is the density of water at the tapA1 is the cross-sectional area of the tapv1 is the speed of water at the tapρ2 is the density of water at the exit (we assume it to be the same as ρ1)A2 is the cross-sectional area of the water column at the exitv2 is the speed of water at the exit (what we need to calculate)We can rearrange this equation to solve for v2:
v2 = (ρ1A1v1) / (ρ2A2)
We know that A1 = 1.5 cm², A2 = 0.45 cm², and the vertical distance fallen is 6.0 cm. We can find the speed of water at the tap using the equation for the potential energy:
mgh = (1/2)mv1²
where m is the mass of the water, g is the acceleration due to gravity, h is the vertical distance fallen, and v1 is the speed of water at the tap.
We can rearrange this equation to solve for v1:
v1 = √(2gh)
where;
h = 6.0 cm and g = 9.81 m/s².We also know that the density of water at room temperature is approximately 1000 kg/m³, which is equivalent to 0.001 g/cm³.
Putting all these values into the equation for v2, we get:
v2 = (0.001 g/cm³ x 1.5 cm² x sqrt(2 x 9.81 m/s² x 6.0 cm)) / (0.001 g/cm³ x 0.45 cm²)
Simplifying this expression, we get:
v2 = 1.89 m/s
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Describe the relationship between the materials and amount of thermal energy transfer?
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Answer:If you mean how much heat it can transfer as a thermal mass - in order to move heat from one place to another:
Typically the relationships are given by specific heat capacity (at different temperatures) and latent heats, plus the end-point temperatures to determine which of these conversion factors are relevant.
If time comes into it, you are looking at including shape and thermal conductivity at the minimum, so you really would need to be more specific
Explanation:
Cfare nxitimi shkakton forca F=40N,qe vepron ne
me mase m=10kg??
Answers
discuss whether any work is being done by each of the following agents and, if so, whether the work is positive or negative. (a) a chicken scratching the ground a chicken does work on the ground. the ground does work on the chicken. no work is done. is the work positive or negative? the work is positive. the work is negative. no work is done. (b) a person studying (holding up a book but not moving it) the person does work on a book. the book does work on the person. no work is done. is the work positive or negative? the work is positive. the work is negative. no work is done. (c) a crane lifting a bucket of concrete the crane does work on the bucket. the bucket does work on the crane. no work is done. is the work positive or negative? the work is positive. the work is negative. no work is done. (d) the force of gravity on the bucket in part (c) the bucket does work on gravity. the force of gravity does work on the bucket. no work is done. is the work positive or negative? the work is positive. the work is negative. no work is done. (e) the leg muscles of a person in the act of sitting down the leg muscles do work on the individual. the individual does work on the leg muscles. the individual does work on the chair. no work is done. is the work positive or negative? the work is positive. the work is negative. no work is done.
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"a) The chicken scratching the ground does zero work.
b) A person studying is still and has no displacement so the work done is zero.
c) A crane lifting the bucket does positive work.
d) The force of gravity on the bucket does negative work.
e) The leg muscles of a person in the act of sitting down does negative work."
Mathematically, work done can be written as,
W = F r cosθ
where,
θ is the angle between force and displacement
r is displacement
a) The displacement is zero because the chicken is still, which suggests that the work is also zero.
b) As the person is still there is no displacement and the work done is zero.
c) The crane applies a vertical force and the displacement is vertical, therefore the work is positive.
d) The force of gravity is directed downwards and the displacement is upwards, so the angle between it is 180º and the 180º fly is -1. Consequently, the work is negative
e) When the person meticulously feels the upward force and the displacement is downward, the work is negative.
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the value for ψ in root tissue was found to be -0.15 mpa. if you take the root tissue and place it in a 0.1 m solution of sucrose (ψ = -0.23 mpa), the net water flow would
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The evaluated net water flow is 0.08 MPa under the context that 0.15 mpa is selected as the root tissue and placed it in a 0.1 m solution of sucrose ψ = -0.23 mpa.
Then water potential of root tissue = -0.15 MPa, now that of a 0.1 M solution of sucrose = -0.23 MPa. Then water potential gradient is
Δψ = ψ1 - ψ2
here
Δψ = water potential gradient,
ψ1 = water potential of root tissue
ψ2 = water potential of a 0.1 M solution of sucrose
Staging the values in the formula
Δψ = (-0.15) - (-0.23)
Δψ = 0.08 MPa
Hence, the level of sucrose solution has a lower in comparison to water potential present in the root tissue, therefore water will flow from the sucrose solution into the root tissue.
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Question 2 (1 point)
This graph shows an object in free fall. Assume there is no air resistance. What is the only force acting on this object?
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Answer:
Actually, there is no force (felt by the object) acting on the object.
It is similar to an object in orbit around the earth (weightlessness)
F = M a describes the motion of the particle where
M a = M g where the acceleration of the particle is equal to the force of gravity acting on the particle
From an external view the only force acting on the particle is M g and it produces an acceleration of M g
There is no force felt by the freely falling body. The cause of free fall is gravitational pull. Where Acceleration is equal to the gravitational acceleration. According to Newton's Law of Gravitation , two bodies attract each other due to their masses and separation , since earth is a very big body therefore the lit body falls towards the earth . Thus the graph plotted is a straight line.
What is Newton's law of Gravitation?
"The force acting between two bodies is directly proportional to product of masses and inversely proportional to the square of the separation ."
F= G.{m_{1} . m_{2} }/r^{2}.
Hence the only force by which the object is falling is gravitational pull.
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a 75 kg road bicycle racer rides down the highway from pikes peak. during one stretch of the ride, he descends 5 meters in 12.5 seconds, while accelerating from 35 km/hr to 55 km/hr. assuming rotational kinetic energy and dissipative forces to be negligible, what average power is supplied by the gravitational force during this time?
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The average power supplied by the gravitational force during this time is 21717 Watt.
The mass of the road bicycle racer riding down the highway is 75kg.
The height through which he descends is 5 meters and the time taken by it is 12.5 seconds, the initial velocity of the bicycle is 35km/h(9.7m/s) and the final velocity of the bicycle is 55 km/h(15.27m/s).
The acceleration applied due to earth on the bicycle can be found as,
V²-U² = 2aS
V is the final velocity,
U is the initial velocity,
a is the acceleration created due to earth,
s is the height of the bicycle.
Putting values,
(15.27)²-(9.7)² = 2(a)(5)
a = 13.9m/s².
Now, the work done by the earth on the bicycle is,
W = 75(13.9)(5)
W = 267712.5 Joules.
The power supplied = Work done/time
Power supplied = 21717 Watt.
So, the power supplied by earth is 21717 Watts.
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Approximately how long does it take the uterus lining to build up again after menstruation
Answers
The uterus lining is rebuilt by the end of the menstrual period. The rebuilding of the uterus lining starts after menstruation and the lining is typically completely rebuilt by day 14 of the menstrual cycle, which is when ovulation occurs and the uterus is preparing to potentially receive a fertilized egg.
The endometrium is the inner lining of the uterus, and it thickens every month to prepare for pregnancy. After menstruation, the endometrium grows and thickens to prepare for the implantation of a fertilized egg. The cells in the lining multiply and enlarge, and the glands in the lining begin to secrete mucus and other substances that help support the fertilized egg and promote its growth.
The rebuilding of the endometrium usually takes about two weeks after menstruation. This process is closely regulated by hormones such as estrogen and progesterone, which are produced by the ovaries and other parts of the body. These hormones help control the growth and development of the endometrium and other reproductive tissues.
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which, if any, of these statements are true? (more than one may be true.) check all that apply. which, if any, of these statements are true? (more than one may be true.)check all that apply. a battery is a source of current. the current leaving the battery is always the same. a battery supplies energy to a circuit. a battery is a source of potential difference. the potential difference between the terminals of the battery is always the same.
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Out of the given statements a, c and d are true. a battery is a source of current, a battery supplies energy to a circuit and a battery is a source of potential difference..
a. True, a battery is a source of electric current.
b. False, the current leaving the battery may vary depending on the resistance of the circuit.
c. True, a battery supplies energy to a circuit.
d. True, a battery is a source of potential difference.
e. False, the potential difference between the terminals of the battery may vary depending on the state of the battery (e.g. its charge level) and the resistance of the circuit.
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--The complete question is, which, if any, of these statements are true? (more than one may be true.) check all that apply.
a. a battery is a source of current.
b. the current leaving the battery is always the same.
c. a battery supplies energy to a circuit.
d. a battery is a source of potential difference.
e. the potential difference between the terminals of the battery is always the same.
: (a) A cosmic-ray proton in interstellar space has an energy of 13. 0 MeV and executes a circular orbit having a radius equal to that of Mars' orbit around the Sun (2. 28 x 10¹¹ m). What is the magnetic field (in T) in that region of space? (b) What If? The cosmic ray proton enters our solar system where the interplanetary magnetic field has a magnitude of 5. 00 m and is perpendicular to the velocity of the proton. What is the radius (in m) of the proton's circular orbit in this field?
Answers
We can use the formula for the centripetal force experienced by a charged particle moving in a magnetic field and when the cosmic ray proton enters our solar system, it experiences an interplanetary magnetic field that is perpendicular to its velocity.
(a) To find the magnetic field in the region of space where the cosmic-ray proton is executing a circular orbit, we can use the formula for the centripetal force experienced by a charged particle moving in a magnetic field. The centripetal force is given by the equation:
F = qvB
Where:
F is the centripetal force,
q is the charge of the particle (in this case, the charge of a proton),
v is the velocity of the particle,
B is the magnetic field strength.
The centripetal force can also be expressed as:
F = mv²/r
Where:
m is the mass of the proton,
v is the velocity of the proton,
r is the radius of the circular orbit.
Equating the two expressions for the centripetal force, we have:
qvB = mv²/r
Rearranging the equation, we can solve for the magnetic field B:
B = mv/rq
Given the energy of the proton (13.0 MeV), we can use the relation between energy and velocity for a particle with rest mass m:
E = mc² = (γ - 1)mc²
Where:
E is the energy of the particle,
m is the rest mass of the particle,
c is the speed of light,
γ is the Lorentz factor.
The Lorentz factor can be expressed as:
γ = E/mc² + 1
Substituting the given energy and rest mass of the proton, we can calculate the Lorentz factor.
Now, we can substitute the values of m, v, and r into the equation for the magnetic field B and solve for B.
(b) When the cosmic ray proton enters our solar system, it experiences an interplanetary magnetic field that is perpendicular to its velocity. In this case, the proton will follow a helical path in the magnetic field.
To find the radius of the proton's circular orbit in this field, we can use the formula for the radius of a helical path in a magnetic field:
r = mv/|q|B
Where:
m is the mass of the proton,
v is the velocity of the proton,
|q| is the magnitude of the charge of the proton,
B is the magnitude of the magnetic field strength.
Substituting the given values of m, v, and B into the equation, we can calculate the radius of the proton's circular orbit in this field.
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The work function for cesium is 1.96 eV. (a) Find the cutoff wavelength for the metal, (b) what is the maximum kinetic energy for the emitted electrons when 425 nm light is incident on the metal
Answers
Answer:
Explanation:
λ = hc/¢
Where
h = the Plank constant 6.63 x 10-34 Is
C = 3.0×10^8
¢= 1.96eV
= (6.63×10^-34Js)×(3×10^8)÷( 1.96eV) × 1eV/1.6×10^-19J
= (1.989×10^-25)÷( 1.96eV)×1eV/1.6×10^-19J
= 6.342×10^-7m
B) maximum kinetic energy
= K=hf−ϕ ........1
ϕ = hc
Where
h = constant 6.63 x 10^-34Js
ϕ= 1.96eV
Recall
λ =425×10^-9m
f = frequency in Hz
f = c / λ
C = 3.0×10^8
f = 3.0×10^8 / 425×10^-9m
f = 0.000705Hz
From equation 1
K = (6.63 x 10^-34Js×0.000705Hz )- 6.63 x 10^-34Js×3.0×10^8
= 4.68×10^-37 - 1.989×10^-25
= - 1.98×10^-25J
Pls help me I need help thanks.
Answers
Answer: The Answer Is A
Explanation:
what hapenes to the wavelength of a wave if the frequency of the wave is increased?
Answers
Answer: The number of complete wavelengths in a given unit of time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.
Explanation:
Choose the answer to fill in the blank, which best completes the sentence.
Choice of medium allows the artist to ________________
a.
convey different messages.
b.
experiment with combining materials to create new media.
c.
reconnect with old forms of art.
d.
improve realism in art, particularly with portraits.
Answers
Answer:
A on edge 2020
Explanation:
Answer:
a. convey different messages.
Explanation:
Got it on edge just took the test.
Been stuck on this question for quite awhile, a detailed
explanation will be much appreciated! Will give a like :)
We aim to test pesticides' impact on the survival time for bugs. In the experiment, the researchers consider three dose levels (low, medium, high) are applied with the same type of pesticides produced
Answers
These dose levels represent varying concentrations or amounts of the same type of pesticide that is being used. the use of three dose levels with the same type of pesticide in this experiment allows for a comprehensive evaluation of how varying pesticide concentrations affect bug survival time, providing insights into the potential impact of pesticides on insect populations and ecosystems
The purpose of using multiple dose levels is to examine the potential relationship between pesticide dosage and bug survival time. By applying different doses, the researchers can observe if there is a dose-dependent effect, where higher doses result in shorter survival times or increased mortality rates among the bugs. This allows them to understand the potential toxicity or effectiveness of the pesticide at different concentrations.Using the same type of pesticide for all three dose levels ensures that the observed effects are solely attributed to the dose variations and not due to different chemical properties or compositions of the pesticides. This helps in establishing a direct comparison between the dose levels and their impact on bug survival time.By analyzing the survival times of bugs exposed to low, medium, and high doses of the pesticide, the researchers can gather data on the dose-response relationship. This information is valuable in assessing the potential risks and determining the optimal dosage for pest control purposes while minimizing adverse effects on non-target organisms. Overall, the use of three dose levels with the same type of pesticide in this experiment allows for a comprehensive evaluation of how varying pesticide concentrations affect bug survival time, providing insights into the potential impact of pesticides on insect populations and ecosystems.
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If a snail travels at 5 m/s, how far will it travel in 90 seconds?
Answers
Answer:
in 90 seconds It'll travel 450m At constant speed of 5m/s
Answer:
d = 450 m
Explanation:
d
use the formula v = ----
t
v = 5 m/s
t = 90 seconds
d
5 m/s = -------------
90 sec
d = 5 m/s ( 90 sec)
d = 450 m
help please fast + i dont want an answer from g**gle .
Answers
how long does it take an automobile traveling in the left lane of a highway at 50.0 km/h to overtake (become even with) another car that is traveling in the right lane at 40.0 km/h when the cars' front bumpers are initially 90 m apart?
Answers
It will take about 32.37 seconds for the left car to overtake the right car.
time = distance / relative speed
To Find out, We can use relative velocity concept here. The relative velocity between the two cars is the difference between their velocities.
\(50.0 km/h - 40.0 km/h = 10.0 km/h.\)
Next, converting the velocities from km/h to m/s, since the distance is given in meters. The conversion factor is
\(1 km/h = (1000/3600) m/s.\)
So, the relative velocity in m/s is:
\(10.0 km/h * (1000/3600 m/s) = 2.78 m/s\)
Now we can plug in the values we know to the formula to find the time it takes for the left car to overtake the right car:
\(time = 90 m / 2.78 m/s = 32.39 s\)
So, it takes 32.39 seconds for first car to overtake the second car.
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Describe the relationship between a moving object's mass and its kinetic energy.
Answers
Answer:
\(E=\dfrac{1}{2}mv^2\)
Explanation:
If m is the mass of the object and v is the velocity of the object. The kinetic energy is due to the motion of an object. It is given by the relation as follows :
\(E=\dfrac{1}{2}mv^2\)
The above formula is used to find the kinetic energy of an object.
Can someone buy me
it will make my day
Answers
Answer:
how much?
Explanation:
True or false: in our solar system, only the sun creates radio waves
Answers
a book is pulled across a desk with a coefficient of friction of 2.25 at constant velocity. if the tension is 2.04 n, how much acceleration does the book have?
Answers
The acceleration 0f book is 1.1029 m/s²
What is meant by accerlation ?Acceleration is the general term for any process where the velocity changes. There are only two ways to accelerate: either by increasing speed or decreasing direction, or both. The reason for this is that velocity includes both a speed and a direction.
The definition of acceleration is the speed at which velocity varies with respect to time. Acceleration is a vector quantity since it has both a magnitude and a direction.
Given,
velocity = 2.25
time = 2.04
accerlation = v - v0/t
= Δv/Δt
= 2.25/2.04
= 1.1029 m/s²
Therefore the acceleration of book is 1.1029 m/s²
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compare and contrast the properties of visible light, ultraviolet rays, and x-rays.
Answers
Visible light, ultraviolet rays, and X-rays are all forms of electromagnetic radiation, with differences in their wavelengths, frequencies, and energies.
Visible light is the part of the electromagnetic spectrum that human eyes can perceive. It has a wavelength range of 400-700 nanometers, with violet having the shortest wavelength and red having the longest. Visible light can be refracted, reflected, and diffracted, and it can be split into its component colors using a prism.
Ultraviolet (UV) rays have shorter wavelengths and higher frequencies than visible light. They have wavelengths between 10-400 nanometers. UV radiation is classified as UVA, UVB, and UVC, with UVC having the shortest wavelength and highest energy. UV rays can cause damage to DNA and can cause sunburn and skin cancer.
X-rays have even shorter wavelengths and higher frequencies than UV rays. X-rays have wavelengths between 0.01-10 nanometers. They can penetrate through materials that visible light and UV radiation cannot, such as body tissues and bones, making them useful in medical imaging. X-rays are also produced in outer space and can be used to study the universe.
In summary, the main differences between these types of electromagnetic radiation are their wavelengths, frequencies, and energies, which determine their properties and potential applications.
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