HURRY!!!
Which would result in an increase in the attractive force between two magnets?
A. The north poles of two magnets move closer together.
B. The south poles of two magnets move away from one another.
C. The north pole of one magnet moves closer to the south pole of another
magnet.
D. The north pole of one magnet moves away from the south pole of another
magnet.
How could you increase the kinetic Energy of an object without changing
its mass or gravity? *
Answer: Height
Explanation:
You could raise it further off the ground.
Help me with this please. :))
What is the period and frequency of the second hand on a clock?
Answer:
Explanation:For second hand, period = 1 min = 3660 s; frequency = 0.0166 Hz}\\\mbox{For minute hand, period = 1 hr = 3600 s; frequency = 2.77}\times10^{-4} Hz\\\mbox{For hour hand, period = 12 hrs = 4300 s; frequency = 2.3}\times10^{-5} Hz.
The specific heat capacity of aluminium block is 9130 per kg per °C and its
temperature is increased by 10 °C. 4565 J of energy is transferred. Calculate the
mass of the aluminium block.
Answer:
Q
Explanation: you don't need to convert °°C to K Temperature difference is the same on both scales
It is the obligation of researchers to review and comment on the research of other researchers. Please select the best answer from the choices provided T F.
Thorough inquiry and analysis of materials and sources to establish facts and reach new findings are known as resarch. False is the best answer from the choices provided
What is research?Thorough inquiry and analysis of materials and sources to establish facts and reach new findings.
It is false that researchers are required to evaluate and remark on the work of other researchers. It is not their responsibility - they do not have to do it,
But they may if they want to and if the author allows them to. However, they are not compelled to do so by law or anything else. They do it simply out of goodwill or genuine interest.
Hence False is the best answer from the choices provided.
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Answer: false
Explanation:
How can you edit the light wave to increase the photosynthesis in the plant?
A) decrease the amplitude of the wavelength to increase the intensity
B) change the wavelength to the size of a bridge
C) increase the amplitude of the wavelength to increase the intensity
Answer: C) Increase the amplitude of the wavelenghth to increase the intensity.
Explanation:
When a golf ball is hit, it travels at 41 meters per second. The mass of a golf ball is 0.045kg. Calculate the kinetic energy of the golf ball.
Answer:
75.645 J
Explanation:
The kinetic energy is related to the mass and velocity by the formula ...
KE = 1/2mv²
For the given mass of 0.045 kg, and velocity of 41 m/s, the kinetic energy is ...
KE = 1/2(0.045 kg)(41 m/s)² = 75.645 J
__
The unit of energy, joule, is a derived unit equal to 1 kg·m²/s².
The James Webb Space Telescope is positioned around 1.5 million kilometres from the Earth on the side facing away from the Sun. The telescope remains at this distance and orbits around the Sun with the Earth’s orbital velocity.
--Determine the angular velocity ω of the telescope as it orbits around the Sun.
--The centrifugal Fω and gravitational force FG are acting on objects orbiting the Sun: F =Fω−FG. Based on this, how much should the telescope accelerate towards or away from the Sun?
--Why is the orbit of the telescope stable nonetheless? What other forces need to be considered?
The angular velocity depends on the length of the orbit and the orbital
speed of the telescope.
Response:
First question:
The angular velocity of the telescope is approximately 0.199 rad/sSecond question:
The telescope should accelerates away by approximately F = 0.0005·mThird question:
The pulling force between the Earth and the satelliteWhat equations can be used to calculate the velocity and forces acting on the telescope?The distance of the James Webb telescope from the Sun = 1.5 million kilometers from Earth on the side facing away from the Sun
The orbital velocity of the telescope = The Earth's orbital velocity
First question:
[tex]Angular \ velocity = \mathbf{\dfrac{Angle \ turned}{Time \ taken}}[/tex]
The orbital velocity of the Earth = 29.8 km/s
The distance between the Earth and the Sun = 148.27 million km
The radius of the orbit of the telescope = 148.27 + 1.5 = 149.77
Radius of the orbit, r = 149.77 million kilometer from the Sun
The length of the orbit of the James Webb telescope = 2 × π × r
Which gives;
r = 2 × π × 149.77 million kilometers ≈ 941.03 million kilometers
Therefore;
[tex]Angular \ velocity = \dfrac{29.8}{941.03}\times 2 \times \pi \approx 0.199[/tex]
The angular velocity of the telescope, ω ≈ 0.199 rad/sSecond question:
Centrifugal force force, [tex]F_{\omega}[/tex] = m·ω²·r
Which gives;
[tex]F_{\omega} = m \cdot \dfrac{28,500^2 \, m^2/s^2}{149.77 \times 10^9 \, m} \approx 0.0054233 \cdot m[/tex]
[tex]Gravitational \ force, F_G = \mathbf{G \cdot \dfrac{m_{1} \cdot m_{2}}{r^{2}}}[/tex]
Universal gravitational constant, G = 6.67408 × 10⁻¹¹ m³·kg⁻¹·s⁻²
Mass of the Sun = 1.989 × 10³⁰ kg
Which gives;
[tex]F_G = 6.67408 \times 10^{-11} \times \dfrac{1.989 \times 10^{30} \times m}{149.77 \times 10^9} \approx 0.00592 \cdot m[/tex]
Which gives;
[tex]F_{\omega}[/tex] < [tex]F_G[/tex], therefore, the James Webb telescope has to accelerate away from the Sun
F = [tex]\mathbf{F_{\omega}}[/tex] - [tex]\mathbf{F_G}[/tex]
The amount by which the telescope accelerates away is approximately 0.00592·m - 0.0054233·m ≈ 0.0005·m (away from the Sun)
Third part:
Other forces include;
The force of attraction between the Earth and the telescope which can contribute to the the telescope having a stable orbit at the given speed.Learn more about orbital motion here:
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A "phaser" blast form the starship "ENTERPRISE" sends out a
light burst with a wavelength of 636 nanometers.
(nm=1. 0x10-9m) What is the frequency of the light beam?
The frequency of the light beam is 4.72 x 10¹⁴ Hz.
Frequency of the light beamThe frequency of light beam and wavelength of light is related in the following equations;
c = fλ
where;
c is the speed of light = 3 x 10⁸ m/sf is the frequencyλ is the wavelengthf = c/λ
f = (3 x 10⁸) / (636 x 10⁻⁹)
f = 4.72 x 10¹⁴ Hz
Thus, the frequency of the light beam is 4.72 x 10¹⁴ Hz.
Learn more about frequency of light beams here: https://brainly.com/question/14295752
What is the wavelength of a periodic wave that has a frequency of 5.0 Hz and
a speed of 10 m/s?
Answer:
26
Explanation:
meters per second has a wavelength of 26.
If the distance between slits on a diffraction grating is 0. 50 mm and one of the angles of diffraction is 0. 25°, how large is the path difference? nm How many orders of bright lines does this equal for red light with a wavelength of 650 nm? wavelengths.
The distance the wave traveled between the two-point is the path difference. The path difference will be 2200 nm and 3 orders of bright lines do this equal red light with a wavelength of 650 nm.
What is diffraction grating?A diffraction grating is a type of optical instrument obtained with a continuous pattern. The pattern of the diffracted light by a grating depends on the structure and number of elements present.
The equation of diffraction grating is given as
[tex]\rm n\lambda=dsin\phi\\\\\rm n\lambda=0.50\times10^{-3}\times sin(0.25) \\\\ n\rm \lambda=2.18\times10^{-6} \;m \\\\\rm n\lambda=2200\;nm[/tex]
Hence the path difference will be 2200 nm.
[tex]\rm n\lambda=2200\;nm \\\\\rm n\times650=2200 \\\\\rm n=3.38[/tex]
n= 3
Hence 3 orders of bright lines do this equal red light with a wavelength of 650 nm.
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1. You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has __________________ energy. Calculate it.
Which factors affect the flow of electric charge? Check all that apply.
The factors that affect the flow of electric charge will be Voltage and resistance.
What are the factors which affect the flow of the charge?The flow of the charge depends upon the voltage because the voltage is responsible to push or it applies the force on the particles to flow.
For example, whenever your battery gets discharged what happens is the potential difference of voltage becomes zero.
So there will not be enough force remaining in the battery to flow the charge but when we charge the battery then it regains its voltage and again pushes the charges to flow.
Now the resistance acts just opposite to the voltage because it restricts the flow of the charges so if the resistance is more then more voltage is required to flow the charge.
Thus the factors that affect the flow of electric charge will be Voltage and resistance.
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how does water in a hot spring get hot?
Identify and describe two changes of state that release energy.
Why do the golf ball have dimples?
Answer:
HELLO! I WILL EXPLAIN WHY GOLF BALLS HAVE DIMPLES.
Explanation:
DIMPLES ON A GOLF BALL CREATE A THIN BOUNDARY LAYER OF AIR THAT CLINGS TO THE BALL'S SURFACE. THIS ALLOWS THE AIR TO FOLLOW THE BALL'S SURFACE A LITTLE FARTHER AROUND THE BACKSIDE OF THE BALL, THEREBY DECREASING THE SIZE OF THE WAKE.
I AM SO SORRY ABOUT THE CAP LOCKS I THINK MY CAP LOCKS BUTTON IS PUSHED, AND IT IS NOT POPPING UP FOR SOME REASON.
ANYWAYS, HAVE A GREAT DAY!!!!!!
Sunspots, flares, prominences, and coronal mass ejections are all caused by.
Answer:
Sunspots, flares, prominences, and coronal mass ejections are all caused by magnetic activity on the Sun.
1. If you stare at a field of dots moving upward for 10 seconds and they suddenly stop, in which direction would the dots appear to drift after they stop
The direction the dots will appear to drift after they stop is upwards.
Upward motion of the dotsThe upward motion of the dots appears to be continuous upward for first few seconds it stopped.
This is as a result of conditioning of the mind picturing the dots moving upwards. After few seconds the dots were, the eye perceives a continuous upward motion of the dots before it readjusts and notice that it has stopped.
Thus, the direction the dots will appear to drift after they stop is upwards.
Learn more about drift velocity here: https://brainly.com/question/25700682
The amount of energy in the universe:
A)is decreasing slowly.
B)is rapidly decreasing.
C)is increasing quickly.
D) remains constant.
Answer: D
Explanation:
The total energy in the universe is constant. It cant be created or destroyed
Answer:
A
Explanation:
energy decays overtime
The speed of sound in a solid medium is more but less in a gas medium.Why?
Answer:
The speed of sound is the most in solids as the molecules present in solids are closer where as the molecules in gas medium are far apart from each other....
Explanation:
Hope this helps!!!!
How do waves interact with our senses?
Answer:
well sound waves interact with our ears and light interacts with our vision
Explanation:
Answer:
Hearing employs air or water waves, whereas sight uses the electromagnetic spectrum. The electrical and chemical neural impulses are sent through the human auditory nerve to the brain once the mechanical energy of the sound waveform is converted into neurological stimulation.
3 How could you test whether a plastic rod that has been given an electric charge would attract or repel a magnet? Describe your method and include a diagram. What result would you expect to observe?
The charged plastic rod has affinity for insulting items. So, things like saw dust, paper pieces get attracted to it. On the other hand, magnet has affinity for magnetic material like iron. So, it will attract iron pieces.
What is a fuse??? what it is made up of??
A fuse is a short and thin piece of wire of a uniform area of cross section.
It is made up of a material of low melting point so that it may easily melt due to overheating when the current in excess to the prescribed limit passes through it.Further, it should have high resistance so as to produce sufficient heat to melt it. Generally an alloy of lead and tin is used as the material of the fuse wire because its melting point is low (=250°) and specific resistance is high.Explanation:
Hope it helps you!!A fuse is a safety device in an electric plug or circuit. It contains a piece of wire which melts when there is a fault so that the flow of electricity stops.
The fuse wire is made up of Sn (tin) and Pb (lead) alloy because of its high resistance and low melting.
First attachment shows fuse arrangement normally used in the houses and second attachment shows a cartridge type of fuse that is used mainly in costly appliances of our home like an air conditioner, geyser, etc.
Explanation:
Hope it helps you!!A cyclist starts to pedal vigorously, increasing her velocity from 6.0 m/s [E] to 14.0 m/s [E]
in 6.0 s. The total mass of the cyclist and the bicycle is 58 kg. Find the net force acting
on the cyclist and bicycle. [ans: 77 N [E]]
vf=vi+at
14=6+a.6
a=1.33 m/s²
∑F = m.a
∑F =58 x 1.33
∑F = 77.14 /n
Why are metals so ductile?
A) The atoms form regular crystal arrangements, allowing them
to pack closely together.
B) The atoms form long chains that are very difficult to break.
C) The atoms can slide past each other while still remaining
attracted to each other electrically.
D) The atoms share electrons in a way that allows them to move
easily from one atom to another.
Answer:
i think .A
Cari on learning
Sometimes the north and south poles of atoms in a material will line up. What is the term for the region where this occurs?.
Answer:
Magnetic domains
What is an effect of gravity on objects on the surface of Earth? Check all that apply. Objects ""fall"" toward the center of Earth. Objects are pulled by Earth but do not pull on Earth. Objects accelerate at a rate of 9. 8 m/s each second. Objects travel at a rate of 9. 8 m/s toward the center of Earth. Objects are pulled by Earth more strongly than they pull on Earth.
Answer:
Objects are pulled toward earth
Objects travel at a rate of 9.8m/s
Explanation:
these are the only one that I know. sry :(
A 0.045-kg golf ball is dropped from rest. Is dropped from a height of 1.3m and comes back up at a height of .7m
The time to drop from 1.3m and velocity after height at 0.7 mis mathematically given as
t1 = 0.515 sec
v0 = 3.7m/s
What is the time to drop from 1.3m and velocity after height at 0.7?Question Parameters:
A 0.045-kg golf ball is dropped from rest.
Is dropped from a height of 1.3m and comes back up at a height of .7m
Generally, the equation for the time to drop from 1.3m is mathematically given as
yf - yi = vi t + a t^2/ 2
Therefore
0 - 1.3 = 0 - 9.8 t^2 /2
t1 = 0.515 sec
Hence, after its max height is 0.7 m,
vf^2 - vi^2 = 2 a (yf - yi)
0^2 - (v0)^2 = 2(-9.8)(0.7 - 0)
v0 = 3.7m/s
Read more about Time
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What would the gravitational field strength be if 100kJ are required to lift a 6kg mass 20m
Answer:
The formula is: weight/mass = gravitational field strength.
Explanation:
