L = r x p = rmv = mr²ω
L = 0.25 x 0.75² x 12.5 = 1.758
Angular momentum of a 0.25 kg mass rotating on the end of a piece of rope in a circle of radius 0.75 m at an angular speed of 12.5 rad/s is 1.758.
What is momentum?The meaning of MOMENTUM is a property of a moving body that the body has by virtue of its mass and motion and that is equal to the product of the body's mass and velocity. Momentum is a vector quantity.
Angular momentum is momentum in angular motion,
L = r x p = rmv = mr²ω
L = 0.25 x 0.75² x 12.5 = 1.758
Angular momentum of a 0.25 kg mass rotating on the end of a piece of rope in a circle of radius 0.75m at an angular speed of 12.5 rad/s is 1.758.
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How can scientists best confirm and validate the results of an experiment so they can publish their findings?
by removing the control from the experiment
by adding more variables to the experiment
by decreasing the number of trials
by creating a replicable experiment
I think by adding more variables to the experiment.
a slope of length 50m rises to height of 10m above the ground .An effort of 100N is needed to push a 250N object up the ramp.calculate a.AMA b.VR c.efficiency
Answer:
Actual mechanical advantage = force out / force in
250 N / 100 N = 2.5 force out is 2.5 X force provided
250 N * 10 m = 2500 Joules work output
100 N * 50 m = 5000 Joules work input
Efficiency is 2500 / 5000 = 50 %
Not sure what is meant by VR
what is the speed of a wave has a wavelength of 0.5 m/s and a frequency of 2 hz?
Answer: The equation that relates wavelength and frequency for electromagnetic waves is: λν=c where λ is the wavelength, ν is the frequency and c is the speed of light.
10/0.5=20 meter.
Explanation:
The speed of a wave has a wavelength of 0.5 m/s and a frequency of 2 hz is 0.25 m.
What is wave ?Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.
Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform.
There are two types of the wave longitudinal wave and transverse wave.
Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave. Sound wave is a longitudinal wave.
Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a Transverse wave.
The relation between velocity, frequency and wavelength is,
c = λν
Where λ is wavelength, ν is frequency and c is velocity.
Given,
c = 0.5 m/s
ν = 2 hz
λ = ?
Putting all the values in the equation,
0.5 = 2λ
λ = 0.5/2 = 0.25 m
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Felix made a chart listing the uses for two types of mirrors. A 2 column by 2 row table. Column 1 is titled X and contains the following entries: Used as side view mirrors on cars, Used to help people see traffic around blind corners. Column 2 is titled Y and contains the following entries: Used in dental instruments, Used in telescopes to produce enlarged images Which headings belong in the chart? X: Plane Y: Convex X: Concave Y: Plane X: Convex Y: Concave X: Convex Y: Plane.
Answer:
X: convex Y: Concave
Explanation:
Just got it right
1. During the experiment with the hot metal block in cold water, in which direction did the thermal energy flow? By what method did the energy
flow?
1
When there is a temperature difference/Gradient, heat flows from a region of high concentration to region of low concentration.
Energy and Heat/Mass TransferThermal energy flow from region of higher temperature gradient to region of low temperature gradient till equilibrium is reached.
When the hot metal is places in a cold water bath, there will be a temperature difference and by conduction(water conducts heat) the heat will travel in the water medium and circulate till equilibrium
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hello! how to do this?
Answer:
B)
Explanation:
What is the power of a machine that transfers 15,000J of energy in 1 minute?
Answer:
answer is 250 W
Explanation:
W=P * t
t=60s
W= 15000J
15000= P * 60
P= 15000/60
P= 250W. (SI unit of power Watt)
The power of a machine is the rate of energy or work done by the machine. The power for 15000 J of energy in 1 minute is 250 W.
What is power?Power is a physical quantity that describes the rate of work done or energy of on an object. The work done is a vector quantity having magnitude and direction. Whereas, power is a scalar quantity.
When a force applied on a body makes its displaced, the force is said to be done work on the body. When the body do work by a restoring force then work is said to done by the body.
Work done is the product of power and time.
Given that, work done = 15000 J
time = 1 minute = 60 s
power = 15000 J /60 s = 250 W.
Therefore, the power of the machine is 250 W.
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Write a poem about how Earth's rotation causes day and night. Be sure to use
these terms: rotate, axis, sun, move, and Earth. use 16 lines
Answer:
Always on the move
Nothing stays the same
The sun comes and goes
The night you can never escape
Nothing can last for ever
Everything we know rotates
I thought this would be more clever
But it's late and I don't know what else to say
Those were eight lines only
Counting lines makes you lonely
Sixteen is a big number
I feel like I'm going under
It's always daytime somewhere
But it will never be forever
I move in circles
This poem is over
Explanation:
Sorry I thought it would end up better than this
Define propagation of sound
Considering the definition of speed and propagation of sound, sound is a sequence of waves of pressure which propagates through compressible media and depends on the characteristics of the medium in which the propagation occurs.
Definition of speed and propagation of soundSound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid.
That is, sound is a longitudinal wave, mechanical (does not travel in a vacuum) and propagates in all directions, so that the wave front is spherical.
Propagation of sound involves energy transport without matter transport, in the form of mechanical waves.
The speed of propagation of a sound wave depends on the characteristics of the medium in which the propagation occurs and not on the characteristics of the wave or the force that generates it. The speed of propagation of sound waves is also known as the speed of sound.
SummaryIn summary, sound is a sequence of waves of pressure which propagates through compressible media and depends on the characteristics of the medium in which the propagation occurs.
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please help me with this, This is very important for me
Answer:
(a) parallel circuit
(b) (i) ammeter (ii) current
Hope this helps!
4 "Find shelter in a building or a metal-topped vehicle (not a convertible), and close the windows. " Based on this safety tip, what can you conclude about the safety of cars during lightning? A All cars, regardless of type, will protect you from lightning B B Cars are less safe than buildings during lightning. The rubber tires of a car protect you from lightning. D a The metal roof of a car protects you from lightning.
Answer :- Option D
Explanation:-
Coz electric field inside a conductor is zero that's why we don't get electrocuted.
Hope it helps....
What can we say about Gamma waves on
the electromagnetic spectrum?
Answer: Gamma-rays have the smallest wavelengths and the most energy of any other wave in the electromagnetic spectrum. These waves are generated by radioactive atoms and in nuclear explosions. Gamma-rays can kill living cells, a fact which medicine uses to its advantage, using gamma-rays to kill cancerous cells.
Explanation: :)
The force between two objects is 60. N. One object has a positive charge of 1.2 x 10-6 C, while the other has a negative charge of -1.2 x 10-6 C. How far apart are the two objects in cm? (1.5 cm)
The distance between the two objects is 1.5 cm.
To calculate the distance between the two objects, we use the formula obtained from Columb's law
What is Columb's law?Columb's law states that the force of attraction or repulsion between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
Formula:
F = kqQ/r²............... Equation 1Where:
F = Force between the two objectsr = Distance between the objectsQ and q = charges on both objects respectively.k = Columb's constantMake r the subject of the equation
r = √(kqQ/F).............. Equation 2From the question,
Given:
F = 60 Nq = 1.2×10⁻⁶ CQ = 1.2×10⁻⁶ Ck = 8.99×10⁹Substitute these values into equation 2
r = √[(1.2×10⁻⁶×1.2×10⁻⁶×8.99×10⁹)/60]r = √[(12.9456×10⁻³)/60]r = √(2.16×10⁻⁴)r = 1.47×10⁻² mr = 1.47 cmr ≈ 1.5 cm.Hence, The distance between the two objects is 1.5 cm.
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Which of the following correctly arranges the planets by the size of their diameter in increasing order?
Uranus < Neptune < Mercury < Earth
Earth < Mercury < Neptune < Uranus
Mercury < Earth < Saturn < Jupiter
Jupiter < Saturn < Earth < Mercury
Answer:
Mercury<Venus<Earth<Mars<Jupiter< Saturn< Uranus<Neptune
Answer: The answer is C
Explanation: I took the test and got it right
Determine the Momentum of 1000 Kg car moving northward at 40 m/s .
40000 kg⋅m/s
momentum: mass * velocity
p = mv1000 * 4040000 kg⋅m/sQuestion :-
Determine the Momentum of 1000 Kg car moving northward at 40 m/s .Answer :-
Momentum of car is 40,000 Kg m/s .[tex] \rule {180pt} {2pt} [/tex]
Given :-
Mass = 1000 KgVelocity = 40 m/sTo Find :-
Momentum = ?Solution :-
As per the provided information in the given question, we have been given that the Mass of the car is 1000 Kg . Velocity of the car is given 40 m/s . And, we have been asked to calculate the Momentum of the car .
For calculating the Momentum , we will use the Formula :-
Momentum = Mass × VelocityTherefore , by Substituting the given values in the above Formula :-
⇒ Momentum = Mass × Velocity
⇒ Momentum = 1000 × 40
⇒ Momentum = 40000
Hence :-
Momentum = 40000 Kg m/s .[tex] \underline {\rule {180pt} {4pt}} [/tex]
A compact disc has a radius of 6 cm. If the disc rotates about its axis at a constant angular speed of 5 rev/s, what is the total distance traveled by a point on the rim in 40 minutes
The total distance traveled is mathematically given as
d=4.5km
What is the total distance traveled?Question Parameters:
A compact disc has a radius of 6 cm.
the constant angular speed of 5 rev/s
time 40 min
Generally, the equation for the linear speed is mathematically given as
v=w*r
Therefore
v=10 pi * 6
v=60pi cm/s
In conclusion, the equation of the distance
distance = v*t
d=60pi * 2400
d=452389.342 cm
d=4.5km
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Why do we need to convert mass to moles in stoichiometry problems.
A transformer has 200.0 turns in its secondary coil and 120.0 turns in its primary coils. The primary coil is connected to a 80.00 V power supply. If 3.50 A flows in the primary coil, then how much current is there in the secondary coil
No.of primary turns/no.of secondary equal to current in primary /current in secondary therefore 200/120=3.50/C.in secondary =2.1A
2. A 60-nc point charge is located at the center of a 'pi cube of side length m What is the electric flux through each of the faces of the cube?
Answer:
Bağışlayın, bəzi problemlərim olduğu üçün bunu edirəm.
If Felix jumped from an even greater distance, do you think the force on him would be different? If so, how?
Help, This is my last question
Answer:
it would be the same because they are equal
Why do you think there are differences on how far two vehicles should be from each other depending on what types of vehicle they are? How does this promote road safety?
Answer:
to reduce the pace of accident
A lightweight plastic rod has a mass of 2.0 kg attached to one end and a mass of 2.5 kg attached to the other end. The rod has a length of 1.20 m. How far from the 2.0-kg mass should a string be attached to balance the rod
The distance from the 2.0 kg mass at which a string should be attached to balance the rod is 0.67 m.
Distance can be defined as the horizontal length between two points.
To calculate the distance at which the string must be attached to balance the rod, we use the formula below.
Formula:
m₁gx = m₂g(1.2-x)................. Equation 1From the question,
Given
m₁ = 2.0 kg m₂ = 2.5 kgx = Distance of the string from the 2.0 kg massg = Acceleration due to gravity.= 9.8 m/s²Substitute these values into equation 1
2(9.8)(x) = 2.5(9.8)(1.2-x)Solve for x
19.6x = 29.4-24.5xCollect like terms
19.6x+24.5x = 29.444.1x = 29.4x = 29.4/44.1x = 0.67 mHence, the distance from the 2.0 kg mass at which a string should be attached to balance the rod is 0.67 m.
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Find the kinetic energy of a body of mass 2 kg moving with a speed of 10 ms^-1 .
Question :-
Find the Kinetic Energy of a body of Mass 2 kg moving with a Speed of [tex] \bf{10 \: {ms}^{ - 1} } [/tex] .Answer :-
Kinetic Energy is 100 Joule .Explanation :-
As per the provided information in the given question, we have been given that the Mass of the body is 2 kg . Speed of the body is given [tex] \bf{10 \: {ms}^{ - 1} } [/tex] . And, we have been asked to calculate the Kinetic Energy .
For calculating the Kinetic Energy , we will use the Formula :-
[tex] \bigstar \: \: \boxed{ \sf{ \: Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: {mv}^{2} \: }} \\ [/tex]
Where ,
M denotes to the MassV denotes to the SpeedTherefore , by Substituting the given values in the above Formula :-
[tex] \longmapsto \: \: \sf{ Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: {m \: \times \: v}^{2} } \\ [/tex]
[tex] \longmapsto \: \: \sf{Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: 2 \: \times \: {10}^{2} } \\ [/tex]
[tex] \longmapsto \: \: \sf{Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: 2 \: \times \: 100 } \\ [/tex]
[tex] \longmapsto \: \: \sf{Kinetic \: Energy \: = \: \dfrac{1 \: \times \: 2 \: \times \: 100}{2}} \\ [/tex]
[tex] \longmapsto \: \: {\textbf {\textsf {Kinetic \: Energy \: = \: 100 \: Joule }}} [/tex]
[tex] \underline {\rule {180pt} {4pt}} [/tex]
The kinetic energy of the body with the given value of mass travelling at the given speed is 100 Joules.
What is Kinetic Energy?Kinetic energy is simply a form of energy a particle or object possesses due to its motion.
It is expressed as;
K = (1/2)mv²
Where m is mass of the object and v is its velocity.
Given the data in the question;
Mass of the body m = 2kgVelocity v = 10ms⁻¹Kinetic energy of the train K = ?We substitute our given values into the above expression to determine the kinetic energy of the body.
K = (1/2)mv²
K = (1/2) × 2kg × (10ms⁻¹)²
K = 0.5 × 2kg × 100m²s⁻¹
K = 100kgm²s⁻¹
K = 100J
Therefore, the kinetic energy of the body with the given value of mass travelling at the given speed is 100 Joules.
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A website is having a sale, and all items are 25% off the original price, p
Which expressions can be used to find the price of an item after the discount?
Select all that apply
Α.
0.75
B
1.25
CP_25
DP - 0.25
E 001P x 75
how would the heating curve for glass be different from the heating curve for water
Answer:
The heating curve for glass would be different from the heating curve for water because water has a strange behavior while glass also has a strange behavior but is different because it lacks the repeating crystalline structure of solids like ice, or water. Glass becomes soft and impressionable as temperature increases.
Since glass lacks the repetitive crystalline structure present in solids like ice or water, its strange behavior differs from that of glass when heated. This is because glass has a unique, strange behavior than water. As temperature rises, glass becomes brittle and impressionable.
What is Heat?A difference in temperature causes energy to flow from one body to another, recognized as heat. Energy is transferred, or heat flows, when two substances of different temperatures are brought together. The hotter body goes to the cold.
Typically, though not always, this energy transfer causes the temperature of the region of lower temperature to rise and the temperature of the warmer object to fall. It is possible for a substance to absorb heat without increasing its temperature by migrating from one physical state (or phase) to another, such as melting, sublimation, boiling, or shifting from one solid form to the other.
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Which statements best describe half-lives of radioactive isotopes? Check all that apply.
The half-life varies depending on the isotope.
The half-life is the same for every isotope.
Half-lives are always only minutes long.
Half-lives range from fractions of a second to billions of years.
The half-life of a particular isotope is constant.
The half-life of a particular isotope changes constantly.
A,D,E
Answer:
A
Explanation:
half life is the time taken for a radioactive isotopes to dissociate
At what degree is the Equator
located on the globe?
Answer:
0 degrees latitude
Explanation:
At 0 degrees latitude, the Equator is an invisible line that circles the Earth's center.
i need help with this
Which of the following is not true about potential energy?
Select one:
a.
b.
C.
d.
Potential energy is stored energy.
Potential energy is related to position.
Potential energy is a scalar quantity.
Potential energy has direction.
Answer:
[tex]\huge\boxed{\sf Option \ D.}[/tex]
Explanation:
Potential Energy:
Energy stored due to the position of any object is usually known as the potential energy of the object.Type of Quantity:
Potential energy is a scalar quantity which means it is only defined by its magnitude and has no direction.Unit:
The unit of potential energy is joules.Types:
Gravitational potential energyElastic potential energyElectric potential energyNuclear potential energy[tex]\rule[225]{225}{2}[/tex]
If you hold a heavy weight over your head, the work you do __________. Is less than zero is greater than zero is converted into chemical energy Is zero. Is converted into potential energy
If you hold a heavy weight over your head, the work you do is Is converted into potential energy.
What is Work done?Work is said to be done when the applied force displaces an object over a given distance.
Work - energy theoremWork energy theorem states that, the work done on object is equal to change in mechanical energy of the object.
When an object is raised over a given distance the work done is equal to the potential energy of the object given as;
W = P.E = mgh
Thus, If you hold a heavy weight over your head, the work you do is Is converted into potential energy.
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