Answer: 4.24 kg ⋅ m/s
Explanation:
\($$The total momentum of the system is given by:$$p=\sqrt{p_{1}^{2}+p_{2}^{2}}$$According to the information provided, the momentum of first system $p_{1}$ is equal to momentum of second system $p_{2}$$$\begin{aligned}&p=\sqrt{2 p_{1}^{2}} \\&=\sqrt{2 \cdot(0.100 \mathrm{~kg} \times 30 \mathrm{~m} / \mathrm{s})^{2}} \\&p=4.24 \mathrm{~kg} \cdot \mathrm{m} / \mathrm{s}\end{aligned}$$\)
Which stellar spectral type has strong molecular absorption lines in its optical spectrum?
M | K | E | A | I
The M spectral type has strong molecular absorption lines in its optical spectrum.
M stars are cool, low-mass stars with surface temperatures ranging from 2,400 to 3,700 Kelvin. Their cool temperature causes the formation of molecules such as titanium oxide and vanadium oxide, which absorb light in the optical region, leading to the strong molecular absorption lines in their spectra.
This feature makes the M stars useful for studying the properties of molecular gas in the interstellar medium, as well as for identifying and characterizing exoplanets, which are often detected through the radial velocity method using the Doppler shift of these molecular lines.
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(ii) Let R be a rotation and S be a reflection of the euclidean plane E. Give a precise deion of RS, relating it to the classification of isometries of E². Be careful of special cases.
RS is a composition of rotation and reflection in the Euclidean plane E². The precise description of RS depends on the specific properties of the rotation R and reflection S.
In general, if R and S have the same axis or line of symmetry, the composition RS results in a translation. If R and S have intersecting lines of symmetry, RS yields a glide reflection. If R and S have perpendicular lines of symmetry, RS produces a rotation.
It is important to consider special cases, such as parallel lines of symmetry, coinciding axes, or perpendicular lines of reflection, as they may lead to different outcomes. The classification of isometries in E² involves understanding how rotations and reflections combine to create different transformations in the plane.
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Two high-current transmission lines carry currents of 29.0 A and 80.0 A in the same direction and are suspended parallel to each other 37.0 cm apart. Part A: If the vertical posts supporting these wires divide the lines into straight 19.0 m segments, what magnetic force does each segment exert on the other?
Each segment exerts a magnetic force of 0.0052 N on the other.
The magnetic force of one segment on the other can be calculated using the equation F = (μo*I2) / (2πr) where μo is the magnetic permeability, I is the current, and r is the distance between the segments. In this problem, μo = 4π*10-7 N/A2, I = 29.0 A, and r = 37.0 cm. Thus, the magnetic force is F = (4π*10-7*(29.0)2) / (2π*0.37) = 0.0052 N.
Since both wires carry the same current, the magnetic force of each segment on the other is equal. The magnetic force does each segment exert on the other can be determined using the formula given below:F = (μ₀/4π) × (I₁I₂) × (l/d)Where,F is the magnetic force between the wires,I₁ is the current flowing in the first wire,I₂ is the current flowing in the second wire,l is the length of the wires,d is the distance between the wires, andμ₀ is the permeability of free space.
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which of the following changes would induce an electromotive force (emf) in the loop? when you consider each option, assume that no other changes occur
To induce an electromotive force (emf) in a loop, the following changes can be considered, Change in magnetic field strength through the loop, Change in the area of the loop within the magnetic field, Change in the orientation of the loop with respect to the magnetic field.
When any of these changes occur, an emf is induced in the loop according to Faraday's law of electromagnetic induction. The emf is a voltage that drives an electric current within the loop.
1. Change in magnetic field strength: If the magnetic field strength passing through the loop changes, it will induce an emf in the loop. This can be achieved by altering the current flowing through a nearby wire or by using a magnet to change its distance or orientation relative to the loop.
2. Change in the area of the loop: If the area of the loop within the magnetic field changes, it will induce an emf. This can be done by physically changing the size or shape of the loop while keeping it within a constant magnetic field.
3. Change in the orientation of the loop: If the orientation of the loop with respect to the magnetic field changes, it will induce an emf. This can be achieved by rotating or tilting the loop relative to the magnetic field direction.
In summary, any change in the magnetic field strength, the area of the loop, or the orientation of the loop within the magnetic field will induce an emf in the loop, according to Faraday's law of electromagnetic induction.
Complete question is which of the following changes would induce an electromotive force (emf) in the loop? when you consider each option, assume that no other changes occur. check all that apply.
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An induced charge is when charged particles can be attracted to neutral objects.
True or false?
Answer:
the answer is true Induction charging is a method used to charge an object without actually touching the object to any other charged object.
Explanation:
Briefly describe how polygraph tests work. According to the American Psychological Association, these tests are not accurate at all, and they compare them to the flip of a coin. After describing how polygraph test works (in two to three sentences), discuss your thoughts on the accuracy of polygraph tests. Do you agree with the American Psychological Association? Do you think the tests have any benefit, or do you think they should be completely discontinued?
Answer:
no such thing i dont think
Explanation:
Answer:
Polygraph tests are used to determine whether someone is lying or not, and display the physical signs someone is showing when they speak to be interpreted. Polygraphs measure things like heartbeat, breathing rate, and electrical conductivity of the skin, which are signs that get more and more severe when someone tells major lies or lies a lot. Polygraph tests are pretty unreliable because everyone shows different reactions to speaking depending on how anxious they are or any other medical condition, which could falsely incriminate them, but I think it is still important to determine the signs someone displays to use as a datapoint later on in the trial. For those reasons, they should still be used but shouldn't be relied on as heavily.
Explanation:
A boat trip travels are 15 miles in the direction of 45° east of north for an hour the boat then turn and travels at 18 m/s in a direction 5° north of East for an hour
Answer:
Hello your question is incomplete below is the missing piece
What is the magnitude of the boat’s resultant velocity? Round your answer to the nearest whole number.
answer : 25.73 m/s
Explanation:
Given
V1 = 15 miles/hour = 6.71 m/s [ 45° EN ]
V2 = 18 m/s [ 5° NE ]
Calculate the resultant velocity
Vr = 6.71 m/s[45°] + 18m/s[5°].
Vr = ( 6.71 *Cos45° + 6.71 *sin45°) + ( 18 *Cos5° + 18*sin5° )
Vr = ( 4.74 + 4.74 i )+ ( 17.93 + 1.57i) = 22.67 + 12.18i.
Therefore the magnitude
= \(\sqrt{22.67^2 + 12.18^2}\) = 25.73 m/s
still don’t know what to do with this stuff
Answer:
what?
Explanation:
A student attaches a block of mass M to a horizontal spring so that the block-spring system will oscillate if the block-spring system is
released from rest at a horizontal distance D below the system's equilibrium position. The student measures the period of oscillation for
the system to be P. What is the maximum spring potential energy of the system U, in terms of D, M, and P?
As a result, the system's maximum spring potential energy U is given by: U = (2π^2MD^2)/P^2
What is potential energy?Potential energy is the energy stored by an item as a result of its location relative to other objects, internal tensions, electric charge, or other reasons. Potential energy is stored energy that is affected by the relative location of various components in a system. When a spring is squeezed or extended, its potential energy increases. A steel ball has higher potential energy when lifted above ground than when it falls to Earth.
Here,
The maximum spring potential energy U can be calculated using the equation:
U = (1/2)kD^2
where k is the spring constant, which can be found from the period of oscillation using the equation:
k = (4π^2M)/P^2
Substituting the expression for k into the equation for U, we get:
U = (1/2)((4π^2M)/P^2) * D^2
So the maximum spring potential energy U of the system is given by:
U = (2π^2MD^2)/P^2
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A 25 N force stretches a spring 280 cm. What was the spring constant?
Answer:
F= 25N∆l=280cmK=?you apply the formula = K:F/∆l= 0,089N/cmHi there!
Using Hooke's Law:
F = kx
F = Force (N)
k = Spring constant (N/m)
x = displacement (m)
Begin by converting cm to m:
280 cm = 2.8 m
Now, plug in the givens:
25 = 2.8k
k = 8.93 N/m
how does the text compare the energy received from the sun and the energy lost by Earth back into space?
A. The energy from the sun is greater than the energy lost by the earth.
B. The energy from the sun is less than the energy lost by the earth.
C. The energy from the sun is the same as the energy lost by the earth.
D. The energy from the sun is not equal to the energy lost by the earth.
Answer:
is achieved as the energy received from the Sun balances the energy lost by the Earth back into space. ... Shortwave radiation reflected back to space by clouds. -7. Shortwave radiation reflected to space by the earth's surface.
The earth-atmosphere energy balance is achieved as the energy from the Sun is the same as the energy lost by the Earth. Thus, the correct option is C.
What is the Earth-atmosphere energy balance?The earth-atmosphere energy balance is the balance between the incoming energy from the Sun and the outgoing energy or the energy lost from the Earth. Energy that is released from the Sun is emitted in the form of shortwave light and ultraviolet radiations which carry large amount of energy.
The earth-atmosphere energy balance is achieved as the energy received from the Sun balances the energy lost by the Earth's surface back into space. Through this mechanism, the Earth maintains a stable average temperature and therefore also a stable climate on the planet.
Therefore, the correct option is C.
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A 230 v mains powered electrical drill draws a current of 2.5 A calculate the power of the drill at use
What separates the two sections of the solar system?.
Answer:
These two groups of planets are separated by the asteroid belt, a disk of small rocky bodies orbiting the sun between Mars and Jupiter.
Explanation:
Your welcome!
What is the strength of the intermolecular forces between liquid and gas
A rock is thrown downward at an initial velocity of 20m/s from a 40 meter tall building, what will be its final velocity before hitting the ground?
The final velocity of the rock before hitting the ground is 34.42m/s
Velocity of an object can be said as, the rate of change of displacement with respect to time of an object . Its unit is m/s and it is a vector quantity.
V = Δx/Δt
In here , V is velocity , Δx is change in displacement and Δt is change in time of an object.
We are given that,
The rock thrown downward with initial velocity = (-u) = -20m/s
The height of the building before and after hitting the ground = -Δy = -40 m
Therefore , to get the value of the final velocity (v) of the rock before hitting the ground , then the equation of motion cab be written as,
v² = u² + 2a(Δy )
Here , (a) is the acceleration due to gravity and taken negative (-9.81m/s²) due downward direction of the building then putting all the values in above equation of motion ,
v² = (-20m/s)² + 2(-9.81m/s²) (-40m)
v² = 1184.42m/s
v = 34.42m/s
Hence, the final velocity of the rock before hitting the ground would be 34.42m/s .
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Helpppppppppppppppp its timeddddddddddd
Answer:
The answer is the third option.
Explanation:
The electrostatic force, Coulomb's force, is a force that depends on the inverse of the square distance, it is a non-contact force.
On the other hand, stretched spring is a contact force, it needs a contact external force.
Therefore, the answer is the third option.
I hope it helps you!
A car drives at a constant speed of 21 m/s around a circle of radius 100m. What is the centripetal acceleration of the car
The centripetal acceleration of the car driving at a constant speed of 21 m/s around a circle with a radius of 100 m is calculated to be 4.41\(m/s^2.\)
To find the centripetal acceleration of the car, we can use the formula:
a = \(v^2\) / r
where "a" represents the centripetal acceleration, "v" is the velocity of the car, and "r" is the radius of the circular path.
Given that the car drives at a constant speed of 21 m/s and the radius of the circle is 100 m, we can substitute these values into the formula to calculate the centripetal acceleration.
a = (21\(m/s)^2\)/ 100 m
a = 441 \(m^2/s^2\)/ 100 m
a = 4.41 \(m/s^2\)
Therefore, the centripetal acceleration of the car is 4.41\(m/s^2.\) This centripetal acceleration represents the inward acceleration that keeps the car moving in a circular path, and its magnitude is determined by the square of the velocity divided by the radius of the circle.
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What must be true about a surface in order for diffuse reflection to occur?
Answer:
carpet
Explanation:
Diffuse reflection is the reflection of light from a surface such that an incident ray is reflected at many angles rather than at just one angle as in the case of specular reflection.
The structure of carpet's surface is as shown. Thus it shows large amount of diffuse reflection.
sitting on the dock of the bay wasting time with my sister. i get bored and push her off the 2 m dock. How fast is she moving when she belly flops into the water? (And more importantly how badly is she going to hurt me when she catches me?)
Answer:
The data that we have is:
Initial height = 2m
Initial vertical speed: As the sister is only pushed, we can assume that we do not have initial speed in the vertical axis.
Then at the beginning, we only have potential energy, that (using the water as the zero in our axis) can be written as:
U = m*g*h
where m is the mass of your sister, g is the gravitational acceleration, and h is the initial height:
h = 2m
g = 9.8m/s^2
Now, when your sister is about to touch the water, all the potential energy has be transformed into kinetic energy:
K = (m/2)*v^2
Then we have, at that moment:
K = U
(m/2)*v^2 = m*g*h
We want to solve this for v, that is the velocity.
v = √(2*g*h) = √(2*9.8m/s^2*2m) = 6.26 m/s
So the speed at which your sister hits the water is 6.26 m/s
What is the speed of the gravity?
Answer:
299,792,458 m/s
Through these observations alone, scientists determined that the speed of gravity was between 2.55 × 108 m/s and 3.81 × 108 m/s, completely consistent with Einstein's predictions of 299,792,458 m/s.
Explanation:
A ball weighing 20 newtons rolls 20 meters in a straight line on a leve surface. What is its change in potential energy?
A 0J
B 1J
C 40J
D 400 J
Answer:
A
Explanation:
Potential energy = m g h unless h changes there is zero PE change
need help its do today
Answer:
the answers for the first 3 are
C
A
C
Explanation:
What is the centripetal acceleration?
Answer:
centripetal acceleration is when an object accelerates going in a circular motion.
Define the term rest and motion with one example of each.
Explanation:
What is rest ?
A body is said to be rest if it does not change its position with respect to its surroundings.....Example:a book on the table .....( it does not change its position with respect to the table )
What is motion ?
A body is said to be in motion if it can change its position with respect to its surroundings....Example : a football kicked by a player.....\(...\)
Question : What is Rest ?
Answer : An object is said to be at rest if it does not change its position with respect to its surrounding time .Example ...
StatueSleepingstaringstandingunmoved vehiclestopped clockDress kept in a hanger untouched sitting etc......Question : What is Motion ?
Answer : An object is said to be in motion if it position changes with respect to its surrounding and time .Example ....
The moving FanThe dust falling from the carpetThe water that flows from the tapa ball rolling around a moving car etc ......HOPE IT HELPS UPLEASE MARK AS { BRAINLIEST }Find the magnitude of the sum
Answer:
8.57 m
Explanation:
To solve the problem, we have to decompose the two vectors along the two directions first:Vector A:- x component: Ax = +9.66 m- y compoment: Ay = 0 (the vector lies along the x-axis)Vector B:- x component: - y component: So now we can find the sum of the two vectors by adding the components along each axis:And the magnitude of the sum is given by Pythagorean theorem:
More potential energy can be stored by moving against the magnetic force closer to a magnet?
Answer:
if your saying can it? then yes or if you are asking what type of magnetic force then its fr its actual self magnetic force
Explanation:
A skater pushes on the back of a 45.3 kg sled with an average force of 72.5 N over a distance of 15.6 m. Find the final speed of the sled if it was moving at 1.31 m/s initially.
7.19 meters per second
Explanation
Step 1
find the acceleration of the skater
Newton's second law says that when a constant force acts on a massive body, it causes it to accelerate,it is defined by the expression
\(\begin{gathered} F=ma \\ where\text{ F is the applied force} \\ m\text{ is the mass} \\ a\text{ is the accelearaion} \end{gathered}\)so
a) Let
\(\begin{gathered} F=72.5\text{ N} \\ m=45.3\text{ Kg} \end{gathered}\)b) now, replace and solve for a
\(\begin{gathered} F=ma \\ replace \\ 72.5\text{ N=45.3 kg*a} \\ divide\text{ both sides by 45.3 Kg} \\ \frac{72.5N}{45.3}\text{=a} \\ a=1.6\text{ }\frac{m}{s^2} \end{gathered}\)Step 2
Now, to find teh final speed we need to use the expression
\(v_f^2=v_1^2+2ax\)so
a)Let
\(\begin{gathered} v_i=1.31\frac{m}{s} \\ x=15.6m \\ a=1.6\frac{m}{s^2} \end{gathered}\)replace
\(\begin{gathered} v_f^2=v_1^2+2ax \\ v_f^2=(1.31)^2+2(1.6)(15.6) \\ v_f^2=51.63 \\ v_f=\sqrt{51.63} \\ v_f=7.19\frac{m}{s^} \end{gathered}\)so, the answer is
7.19 meters per second
I hope this helps you
a laser beam with intensity 5.8 times 106 w/m2 and wavelength 632.8 nm is aimed vertically upward. what is the maximum radius (in nm) of a spherical particle (density 4700 kg/m3) that can be supported by the laser beam against gravity (g
The maximum radius (in nm) of a spherical particle is 314.18 nm
Lasers emit light in the form of highly directional light beams called laser beams. This means that light travels mostly in one direction, and most of the optical power is typically concentrated in a small area on the order of a square millimeter.
The total force on the particle is
\(F=\frac{I\pi r^2}{c}\)
and its mass is
\(m=\frac{4\pi r^3 \rho}{3}\)
Thus to balance the particle against gravity, we must have
\(\frac{I\pi r^2}{c}=\frac{4\pi r^3 \rho g}{3}\)
Solving for the maximum value of r yields
\(r=\frac{3I}{4\rho gc}\)
\(r=\frac{3*5.8*10^6}{4*4700*9.8*3*10^8}\)
\(r=314.81 nm\)
Hence, maximum value of r is =314.81 nm
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Which diagram best illustrates what happens when electromagnetic waves strike a reflective material?
Answer:
The second diagram does that
The last diagram below represents what happenes when electromagnetic waves strike a reflective material. The last diagram is showed in the image below.
why is a thermometer included in the construction of a calorimeter?
A thermometer is included in the construction of a calorimeter to measure the temperature change that occurs during a chemical reaction.
A calorimeter is a device used to measure the heat transfer in a chemical reaction. This measurement is important because it allows scientists to determine the energy change that occurs during a reaction. The energy change can then be used to determine the energy transfer between the system and the surroundings, which is useful in studying thermodynamics.
A thermometer is included in the construction of a calorimeter to measure the temperature change that occurs during a chemical reaction. By measuring the initial and final temperature of the reaction, scientists can determine the energy transfer that has taken place. This is because energy transfer is directly proportional to the change in temperature.
In other words, as energy is transferred from one substance to another, the temperature of the substances will change. By measuring the temperature change, scientists can determine the energy transfer that has taken place. This information is then used to calculate the enthalpy change for the reaction, which is a measure of the energy transfer between the system and the surroundings.
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