A frictional torque is exerted on a platform while it rotates because the force is along it's axis and changes only the magnitude and not the direction of the angular velocity.
What is frictional torque?A frictional torque is a rotational force that is caused by the movement of two objects that are in contact.
To collect data needed to find the frictional torque exerted on the platform while it rotates the experimental procedure the student should use include the following:
A disc shaped platform with know inertiaThe platform should be mounted on a fixed axle.The platform should also be rotating on a horizontal plane.The quantities that should be measured is that rotational frictional force and angular velocity.
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What is the frequency of a 6.14 x 10^4 m wave?
A. 2.7 x 10 ^ 8 hz
B. 1.18 x 10 ^ 3 hz
C. 4.88 x 10^3 hz
D. 1.4 x 10 ^ -6 hz
Answer:
C.
Explanation:
I think it's c please let me know if it's incorrect
Why electromagnetic energy is renewable? Explain.
How many kilowatts does it take to charge an electric car.
Answer:
The consumption of electric cars depends on the model and the manufacturer. Most electric vehicles can cover up to 100 kilometres with 15 kWh
A girl attempts to drink a large glass of water without stopping. when she finishes, she gasps for air as she was unable to breath while drinking. question 26 options: inherited learned conditioning imprinting
The behaviour that has just been displayed by the girl is an example of a learned behavior.
What is learned behaviour?The term learned behaviour has to do with those behaviour that the individual acquires by practise and are not innate in the organism. The ability to drink a large amount of water without breathing is not inate in man.
Hence, the behaviour that has just been displayed by the girl is an example of a learned behavior.
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FORENSICS!!
What are physical properties for each piece of evidence?
1. Blood
2. Body
3. gun
4. White powder
5. cup
6. Dark hair strand
7. Shell casing
8. Light hair strand
Entropy is a state that goes from “order to disorder," what is the only way living things can slow down this process?
Thr only way living things can slow down the process of entropy is through anabolic processes.
What is entropy?Entropy is the degree of disorderliness or randomness of a substance.
According to the second law of thermodynamics, the entropy of a system always tends to increase.
Metabolism in living things involves two processes:
catabolism and anabolismCatabolism increases entropy whereas anabolism decreases entropy.
Therefore, the only way living things can slow down the process of entropy is by anabolic processes.
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An apple is released from rest 500 m above the ground. Due to the combined forces of air resistance and gravity, it has a speed of 40 m s when it reaches the ground. What percentage of the initial mechanical energy of the apple-Earth system was dissipated due to air resistance
Answer:
84%
Explanation:
Find a ratio
Just a question anybody playing minècraft here?
Answer:
yes/nope
Explanation:
............... :)
A heat conducting rod consists of an aluminum section 0.20 m long and a copper section 0.70 M long both sections have a cross-sectional area of 4 X 10 -4 m2 The aluminum end of the rod is maintained at a temperature of 30 Celsius while the copper and is maintained at 230 Celsius what is the temperature at the point where the aluminum and copper sections meet the thermoconductivity of aluminum is 205W/M k. copper is a 385W/M.K.
A.74°c
B.86°c
C.100°c
D.80°c
E.93°c
Often times we think about insulation, we think about keeping cold items cold, such as drinks in an ice chest or the cool temperature in your home. But insulation also keeps things high! The same thermos that keeps your water cold keep your hot chocolate worm. How was that possible?
Answer:
So, insulation essentially works by creating a sort of barrier between the hot and the cold object. This barrier helps to reduce heat transfer by either reflecting the thermal radiation or by decreasing thermal conduction and convection from one object to the other.
Answer:
So, insulation essentially works by creating a sort of barrier between the hot and the cold object. This barrier helps to reduce heat transfer by either reflecting the thermal radiation or by decreasing thermal conduction and convection from one object to the other.
Calculate the resistance of a lamp if the current through it is 0. 4 A and the potential differnces across it is 8 V
Answer:
20 volts per amp (ohms), sorry the doesn't let me to type below than 20 characters
A white dwarf is ________.an early stage of a neutron stara precursor to a black holea brown dwarf that has exhausted its fuel for nuclear fusionwhat most stars become when they die
An apple is released from rest 500 m above the ground. Due to the combined forces of air resistance and gravity, it has a speed of 40 m s when it reaches the ground. What percentage of the initial mechanical energy of the apple-earth system was dissipated due to air resistance? take the potential energy of the apple-earth system to be zero when the apple reaches the ground.
The percentage of the initial mechanical energy of the apple-earth system that was dissipated is : 84%
Determine the percentage of the initial mechanical energy dissipatedGiven that
Potential energy = mgh = 0
= m* 9.81 * 500 = 0
= 4905 m J
Kinetic energy ( K ) = 1/2 mv²
= 1/2 * m * 40²
= 800 m
Next step : calculate the dissipated energy
dissipated energy = Potential energy - kinetic energy
= 4905 m - 800 m
= 4105 m
Final step : determine the percentage of the dissipated energy
= dissipated energy / potential energy
= 4105 m / 4905 m
= 84%
Hence we can conclude that The percentage of the initial mechanical energy of the apple-earth system that was dissipated is : 84%
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The most reactive nonmetals are the
a. transition metals.
b. noble gases.
c. alkali metals
d. halogens.
Which of the following is NOT one of the dialectical tensions that Baxter and Montgomery address in their theory of relational dialectics?
A) conventionality-uniqueness B) revelation-concealment C) inclusion-seclusion D) judgement-acceptance
Judgement-acceptance is NOT one of the dialectical tensions that Baxter and Montgomery address in their theory of relational dialectics.
What is the Baxter and Montgomery theory?The Baxter and Montgomery theory is a model used in psychology to describe different parts of dialectics.
The Baxter and Montgomery theory put special emphasis on the existence of different layers (dimensions) in dialectics.
The Baxter and Montgomery theory is used to treat dialectical tensions by selecting autonomy over interdependence.
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A long pipe organ is 10 m tall. It has an open end and closed end. Find
the fifth harmonic frequency of this pipe organ pipe when the speed of
sound in the organ is 340 m/s.
Answer:
Resonances occur at:
OC OCOC OCOCOC OCOCOCOC OCOCOCOCOCλ
λ/4 3λ/4 5λ/4 7λ/4 9λ/4
A resonance occrurs at λ/4
Thereafter, resonance occurs every λ/2
The fifth resonance will occur at λ/4 + 2λ = 9λ/4
If λ / 4 = 10 m then λ = 40 m
9 λ / 4 = 10 m because the pipe is 10 m long
λ = 40 m / 9 = 4.44 m the fifth resonance occcurs at a wavelength of 4.44 m
f λ = c = 340 m/sec
f = 340 m/sec / 4.44 m = 76.5 / sec
Note: the first resonance occurs at f = 340 / 40 = 8.5 /sec
What types are used in our homes? *
A. Open circuits
B. Series circuits
C. Parallel circuits
D. None of the Above
Answer:
A parallel circuit is used generally.
Explanation:
Because of that, each appliance gets the same potential difference (voltage ). So that they work better and outlets, switches, and light fixtures are wired in such a way that the hot and neutral wires maintain a continuous circuit pathway independent from the individual devices that draw their power from the circuit.
hope this helps.
Continuing to do a certain motion over and over that’s not good for your body can lead to aches, pains, and even permanent damage.
A.
True
B.
False
Answer:
True
Explanation:
Examples: factory workers at Tyson complain of pains because of doing the same motion for 8 hours a day and how ever many days a year.
I have got a project about hacks so i need help
What Are hacks not computeer hacks like hack in real life
Hacks in real life are tricks to help solve a problem with a simple solution.
Say for example, add a pinch of salt to whip egg white faster.
Answer:
you mean life hack ?...
Explanation:
well life hack is a strategy adopted in order to manage one's time and daily activities in a more efficient way.
life hacks are intended to improve your life e.g setting an alarm clock in order to wake up on time or putting a stoking over the end of your vacuum cleaner to help you find a tiny item etc.
Hope this helps
Which missing item would complete this alpha decay reaction? a. b. c. d. e.
Alpha decay is the term that is used to describe a type of radioactive decay that involves the evolution of a helium nucleus.
What is alpha decay?The term alpha decay is the term that is used to describe a type of radioactive decay that involves the evolution of a helium nucleus. In this case the question is incomplete but I will try to paint a general picture of alpha decay.
The general equation for an alpha decay will produce a daughter nucleus that has an atomic mass less by four units and atomic number that is less by two units.
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What force causes galaxies to move away from one another?.
Answer:
energy left over from the big bang
Explanation:
**Will Give Brainliest If Answered Correctly**
Why is data sent digitally from space probes instead of using an analog device?
What secondary color is made by mixing red and green in the rgb additive-color scheme for light?.
Explanation:
Looking at the placement of primary colors in the RGB color wheel, the mixing of the red and green colors will create Yellow secondary color.
The secondary color that is made by mixing red and green in the rgb additive-color scheme for light is Yellow.
What is secondary color?Red, blue, and some are primary colors. Primary colors cannot be mixed with secondary colors.
All other colors are derived from them. Secondary colors are created by combining two primary colors that are adjacent to each other on the color wheel. Orange, green, and violet are the secondary colors.
As an accent color, a secondary color can be combined with a primary color. The primary color remains dominant, but the secondary color is used in tandem to draw attention.
The sum of two primary colors of equal intensity yields a secondary color: cyan is green+blue, magenta is blue+red, and yellow is red+green.
Thus, the secondary color of red and green combination is yellow.
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A block is pushed against the spring with spring constant 15 kN/m (located on the lefthand side of the track) and compresses the spring a distance 5 cm from its equilibrium position (as shown in the figure below). The block starts at rest, is accelerated by the compressed spring, and slides across a frictionless track (as shown in the figure below). It leaves the track horizontally, flies through the air, and subsequently strikes the ground. The acceleration of gravity is 9.81 m/s
a) What is the speed v of the block when it
leaves the track?
Answer in units of m/s.
b) What is the horizontal distance x the block
travels in the air?
Answer in units of m
c) What is the total speed of the block when it
hits the ground?
Answer in units of m/s
Answer:
F = -K x = 15 kN/m " .05 m = .75 kN = 750 N
W = 1/2 K X^2 original potential energy of block
W = 1/2 * 15 Kn/m * .0025 m^2 = 18.75 J
One cannot calculate speed of block without knowing mass of block.
The starting materials in a nuclear change have a total mass of 2.3465 × 10–27 kg. after the change, the resulting materials have a mass of 2.3148 × 10–27 kg. how much energy was released during the change? 2.85 × 10–12 j 2.08 × 10–10 j 2.11 × 10–10 j 8.56 × 10–4 j
The energy released during the nuclear change is 2.853*10^(-12) J.
What is Nuclear change?
A nuclear change -- involves changes in nuclear structure, such as fission (splitting) of a nucleus or an atom, or fusion (combining) of neutrons and protons to form heavier atoms
Given that,
Total mass
[tex]m=2.3465\times 10^{-27}\ kg[/tex]
After change , the mass of resulting materials
[tex]m'=2.3148\times 10^{-27}\ kg[/tex]
Using the Einstein's mass energy equation
[tex]E=mc^2[/tex]
The energy released during the change is given by
[tex]\Delta E=mc^2[/tex]
Where, [tex]\Delta m[/tex] is the change of mass in the process
c = speed of light
The change in mass
[tex]\Delta m=m-m'[/tex]
[tex]\Delta m=2.3465\times 10^{-27}-2.3148\times 10^{-27}[/tex]
[tex]\Delta m =0.0317\times 10^{-27}\ kg[/tex]
We substitute the value into the formula
[tex]\Delta E=0.0317\times 10^{-27}\times (3\times 10^8)^2[/tex]
[tex]\Delta E=2.853\ti,es 10^{-12}\ J[/tex]
Hence, The energy released during the change is 2.853*10^(-12) J.
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Answer:
A
Explanation:
Which factor suggests that an elliptical galaxy will form?
A. formed in Isolation
B. Higher angular momentum
C. Faster cooling rate
The factor that suggests that an elliptical galaxy will form is : ( B ) Higher angular momentum
Formation of elliptical galaxyThe formation of elliptical galaxy occurs when two sprial corals collide with eachother which causes the spiral corals to lose their shape forming elliptical galaxies in the process. the collision of the spiral corals is made possible by angular momentum possesed by the spiral corals.
Hence we can conclude that The factor that suggests that an elliptical galaxy will form is Higher angular momentum
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find out how was life like in ancient China by exploring the engineering and metal technology of Ancient China. Gather some points about the building of Grand Canal.
The grand canal was built to make easier the transportation of grains to the power center of north china.
How was the Grand Canal built?The canal was built in order to connect the Yellow River in the north with the Yangtze River in the south. This canal is built for making easier the transportion of grain from the south to the centers of north China. The total length of the Grand Canal is 1,776 km.
So we can conclude that the grand canal was built to make easier the transportation of grains to the power center of north china.
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If an investigator wanted to reproduce the results with a beam of protons, what would require to get a strong m = 1 reflection at ϕ = 50∘? If an investigator wanted to reproduce the results with a beam of protons, what would require to get a strong = 1 reflection at = 50? Lower speed particles than for the electron beam. Higher speed particles than for the electron beam. Particles moving at the same speed as for the electron beam
When the investigator wanted to reproduce the results with a beam of protons, the thing required is A. Lower speed particles than for the electron beam.
What is proton?It should be noted that a proton simply means a stable subatomic particle that has a positive electric charge.
In this case, when the investigator wanted to reproduce the results with a beam of protons, the thing required is a lower speed particles than for the electron beam.
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Calculate the electric force between these two electrons. The value of the Coulomb constant 9 × 10^9 N · m^2/C^2 and the elemental charge is 1.6×10^−19C. Answer in units of N.
The electric force between these two electrons will be 2.8 ×10⁻¹⁹ C. The concept of electric force is used in the given problem.
What is electric force?Force on the particle is defined as the application of the force field of one particle on another particle. It is a type of virtual force.
The given data in the problem is;
F is the electric force
K is the Coulomb constant = 9 × 10⁹ Nm²C²
q is the elemental charge = 1.6×10^⁻¹⁹ C
The electric force is found as;
[tex]\rm F=K\frac{Q_1Q_2}{r^2} \\\\ \rm F=9 \times 10^9 \frac{(1.6 \times 10^{-9} \times 1.6 \times 10^{-9}}{((2.82 \times 10^{-15}^2} ) \\\\ \rm F=2.8 \times 10^{-9}\ N[/tex]
Hence the electric force between these two electrons will be 2.8 ×10⁻¹⁹ C.
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An electron, starting from rest, accelerates through a potential difference of 25.0 V. What is the final de Broglie wavelength of the electron, assuming that its final speed is not relativistic
Answer: λ = 0.245 nm
Explanation:
KE = qV
V = 25.0 V
where q = e = 1.6*10^-19
KE = (1.6*10^-19)(25.0 V)
KE= 4.0 * 10^-18 J
λ = [tex]\frac{h}{\sqrt{2mKE} }[/tex]
mass of electron = 9.11 * 10^-34
λ = [tex]\frac{6.626*10^{-34} }{\sqrt{(2)(9.11*10^{-31})(4.0*10^{-18}) } }[/tex]
λ = 2.45 e -10 m
λ = 0.245 nm