Answer:
The Sun
Explanation:
The Sun is a natural source for visible light waves and our eyes see the reflection of this sunlight off the objects around us. The color of an object that we see is the color of light reflected. All other colors are absorbed. Light bulbs are another source of visible light waves. hope this helps you :)
PLEASE HELP!!!!! An electron jumps from one energy level to another in an atom radiating 4.5*10^-19 Joules. If Planck's constant is 6.63*10^-34Js, what is the wavelength of the radiation? (C =3*10^8) 2)
Answer: λ = 4.42 × 10^-7 metres
Explanation:
The emitting radiation energy is the change in energy dE. Where
dE = 4.5×10^-19J
Planck's constant h = 6.63*10^-34Js,
Speed of light C = 3×10^8
The wavelength(λ) of the radiation can be calculated by using the formula
(λ) = hC/dE
Substitute all the parameters into the formula above
(λ) = (6.63×10^-34 × 3×10^8)/4.5×10^-19
(λ) = 1.989^-25/4.5×10^-19
(λ) = 4.42×10^-7 m
Therefore, the wavelength (λ) of the radiation is 4.42 × 10^-7 metres
A blue textbook will _____
green light. A) emit B) reflect C) absorb D) transmit
Answer:
C. Absorb
Blue textbooks are blue because they absorb every color except blue and reflect the blue color so you see the blue. That is why the textbook is blue so it absorbs every color except blue.
Explanation:
How often should cardio exercises be performed? A. Never B. Three to five times a month C. Three to five times a week D. Three to five times a day
Answer:
C. Three to five time a week.
Explanation:
Comparing X-ray to radio wave, which has a shorter wavelength?
X-ray
radio wave
they both have the same wavelength
Other:
Answer:
x-ray
Explanation:
X-rays can penetrate through matter because of their high frequencies while radio waves are not able to do so as much. If you think about it, taking an x-ray requires a lot more energy than for radio waves to allow you to listen to songs on the radio. Hope this helps :)
Most energy in the sun is created by:
A ) Hydrogen atoms fusing into larger Helium atoms
B ) Helium atoms splitting into Hydrogen atoms
C ) Hydrogen atoms splitting into Helium atoms
Answer:
it's A) Hydrogen atoms fusing into larger Helium atoms
If someone upsets you, it is your responsibility to make changes so that they don’t do it again. A. True B. False
Answer:the answer is true
Explanation:
I’m taking the test right now!
20 point question B)
Description:
As we know that the sun offers what most of the world has to go examples could be energy, air. As we also know that heating causes liquid and water that is frozen to evaporate to water vapour gas. Meaning the sun provides the energy necessary for evaporation.
Answer: B
Please mark brainliest
Hope this helps.
The length of a vector indicates the magnitude of the vectoor
A. True
B. False
Answer:
True
Explanation:
A yellow laser provides 210 kJ/mol of energy to excite electrons in a sample. What is the frequency of this light?
Answer:
Frequency, [tex]f=5.24\times 10^{14}\ Hz[/tex]
Explanation:
It is given that, a yellow laser provides 210 kJ/mol of energy to excite electrons in a sample. We need to find the frequency of this light.
Energy, E = 210 kJ/mol
i.e.
[tex]E=210\ \dfrac{kJ}{mol}\\\\E=210\times 1000\ \dfrac{J}{mol}\\\\E=\dfrac{21\times 10^4\ J/mol}{6.022\times 10^{23}\ /mol}\\\\E=3.48\times 10^{-19}\ J[/tex]
The energy used to excite electrons is given by :
[tex]E=hf\\\\f=\dfrac{E}{h}\\\\f=\dfrac{3.48\times 10^{-19}}{6.63\times 10^{-34}}\\\\f=5.24\times 10^{14}\ Hz[/tex]
A football team wears a yellow shirt and white shorts. What would the kit look like:
a. in red light?
b.in green light?
c.in blue light?
In all three cases . . .
-- the shirt appears black, since there's no yellow light shining on it;
-- the shorts appear to have the same color as the light shining on them.
a stationary police officer directs radio waves emitted by a radar gun at a vehicle toward the officer. Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a A.) longer wavelength B.) higher speed C.) longer period D.) higher frequency
Answer:
D) Higher Frequency
Explanation:
Higher frequency because it says a vehicle “towards” the officer
Americium-241 is used in smoke detectors. It undergoes alpha decay with a half life of 432 years. The alpha particles ionize some of the air near the americium-241 source, and these charged ions are collected on a metal plate that has a small voltage applied to it. The collected particles cause a small electric current to flow in the detector. If smoke particles get in between the americium-241 source and the detector and reduce the current, the alarm is triggered. A typical smoke detector experiences 370000 alpha decays each second. How much time is needed for the number of decays to reduce to 93000 decays per second?
Answer:
860.6 years.
Explanation:
The parameters given are;
Initial detector activity = 370000 alpha decays per second
Final detector activity = 93000 alpha decays per second
Formula for time to change in activity is given by the following relation;
[tex]t_{93000} = \dfrac{-ln\dfrac{A}{A_0} }{\lambda} = \dfrac{-ln\dfrac{93000}{370000} }{5.08 \times 10^{-11}} = 2.72 \times 10^{10} \, seconds[/tex]
t₉₃₀₀₀ = 2.72 × 10¹⁰ seconds = 860.6 years.
WILL MARK BRAINLIEST!
WORTH A LOT OF POINTS!
Answer:
Explanation:
I think it’s b
URGENT The nuclear equation is incomplete what particle completes the equation.
Answer: A
Xenon 138
Explanation:
In the attached nuclear reaction, the sum of the mass number in LHS is
239 + 1 = 240
While the Atomic number = 54 + 0 = 54
The sum of the mass number in the RHS is 100 + 2(1) = 102
While the sum of the atomic number is
40 + 0 = 40
The mass number of the missing element is
240 - 102 = 138
While the Atomic number of the missing element is
94 - 40 = 54
Nuclear reaction at equilibrium, the mass number and the atomic number at LHS must be equal to RHS
The missing element is Xenon 138 with atomic number of 54
Therefore, when the Plutonium is bombarded with a neutron, the result of the reaction is the production of Zirconium 100 and Xenon 138 with the bombardment of two neutrons
A machine uses an input force of 200 newtons to produce an output force 1 point
of 800 newtons. What is the mechanical advantage of this machine? *
Nephrons and filtration work because the fluid going into the nephron capsule is under _________ pressure than the fluid outside the capsule.
Answer
Hydrostatic pressure
Explanation:
Filtration occurs as pressure forces fluid and solutes through a semipermeable barrier with the solute movement affected by particle size. Hydrostatic pressure is the pressure produced by a fluid against a surface. The blood inside the glomerulus creates glomerular hydrostatic pressure which forces fluid out of the glomerulus into the glomerular capsule. The fluid in the glomerular capsule creates pressure pushing fluid out of the glomerular capsule back into the glomerulus, opposing the glomerular hydrostatic pressure. This is the capsular hydrostatic pressure. These fluids exert pressures in opposing directions. Net fluid movement will be in the direction of the lower pressure.
A 0.500 kg mass is oscillating on a
spring with k = 330 N/m. The total
energy of its oscillation is 3.24 J. What is the maximum speed of
the mass?
thank you in advance for your help!
Answer:
3.6m/s
Explanation:
The following data were obtained from the question:
Mass (m) = 0.5Kg
Spring constant (K) = 330N/m
Energy = 3.24J
Velocity (v) =..?
The velocity of the mass can be obtained as follow:
E = ½mv²
3.24 = ½ × 0.5 × v²
3.24 = 0.25 × v²
Divide both side by 0.25
v² = 3.24/0.25
Take the square root of both side
v = √(3.24/0.25)
v = 3.6m/s
Therefore, the speed of the mass is 3.6m/s
How do the discovery of gravity and the invention of electronic satellites most likely relate to the processes of scientific investigation and technological design?
A) Engineers used the process of technological design to discover how gravity holds matter in orbit, and then scientists investigated satellites in nature.
B) Scientific investigations discovered that gravity holds objects in orbit, and then technological designers used the discovery to develop electronic satellites.
C) Since scientists were curious about gravity, they used the process of scientific investigation to build the first object that would orbit Earth.
D) Technological designers invented the electronic satellite, and then scientific investigators conducted research to learn how and why it orbited around Earth.
Answer:
(B)Scientific investigations discovered that gravity holds objects in orbit, and then technological designers used the discovery to develop electronic satellites.
Explanation:
The discovery of gravity and the invention and electronic satellites most likely relate to the Scientific investigations that discovered that gravity holds objects in orbit, and then technological designers used the discovery to develop electronic satellites. The correct option is B).
What are electronic satellites?Satellites offer three different kinds of communication services: telephony, broadcasting, and data communications. Telephone calls and services offered to wireless, mobile, and cellular network providers as well as telephone businesses are examples of telecommunication services.
Therefore, the correct option is B) Scientific investigations discovered that gravity holds objects in orbit, and then technological designers used the discovery to develop electronic satellites.
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The normal boiling point of methanol is 64.5 °C. What is the
boiling point in Kelvin?
Answer:
337.5 K or 337.65 K
Explanation:
Celsius to Kelvin
Celsius + 273 = Kelvin
64.5 + 273 = 337.5 K
OR
Celsius to Kelvin
Celsius + 273.15 = Kelvin
64.5 + 273.15 = 337.15 K
Any of the answer can be written. To convert Celsius to kelvin, 273.15 is to be added to the temperature in Celsius. But usually, 273 is added instead of 273.15
Hope this answer helps you.
Your policy says you have 50/100/30 coverage.
Check the correct coverage for this policy.
$50,000 coverage for all injuries in one accident.
$100,000 coverage for all injuries in one accident.
$50,000 coverage for all property damage in a single collision.
$50,000 coverage for injuries to one person in one accident.
$50,000 coverage for damage to a single vehicle in one accident.
$30,000 coverage for all property damage in a single collision.
Answer:
c
Explanation:
The correct coverage for this liability will include:
$50,000 coverage for injuries to one person in one accident.$100,000 coverage for all injuries in one accident.$30,000 coverage for all property damage in a single collision.When a policy says that one has 50/100/30 coverage, it's simply referring to a car insurance coverage. In such a case, the insurance company will pay $50000 in bodily injury liability per person.
The insurance company will also pay $100,000 in bodily injury liability per accident, and will also pay $30,000 in property damage liability.
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a(n) ______ reverses the flow of current through an electric motor.
brush
battery
armature
commutator
Answer:
D). Commutator
Explanation:
Got Correct Edge 2022.
What is the potential energy of two charges of +4.6 μC and +1.0 μC that are separated by a distance of 10.0 cm?
Answer:
U = 0.413 J
Explanation:
the potential energy between two charges q1 and q2 is given by the following formula:
[tex]U=k\frac{q_1q_2}{r}[/tex] (1)
k: Coulomb's constant = 8.98*10^9 NM^2/C^2
q1: first charge = 4.6 μC = 4.6*10^-6 C
q2: second charge = 1.0 μC*10^-6 C
r: distance between charges = 10.0 cm = 0.10 m
You replace the values of all variables in the equation (1):
[tex]U=(8.98*10^9Nm^2/C^2)\frac{(4.6*10^{-6}C)(1.0*10^{-6}C)}{0.10m}=0.413\ J[/tex]
Hence, the energy between charges is 0.413 J
Plz answer them I need answers ASAP
Answer:
4. 13.04m/s²
5. 4x10^11m/s²
6. –3m/s²
Explanation:
Acceleration is defined as rate of change of velocity with time. Mathematically it is represented as:
a = (v – u)/t
a is the acceleration.
v is the final velocity.
u is the initial velocity.
t is the time
With the above formula, we can obtain the acceleration of each question.
4. Determination of the acceleration of the spacecraft.
Data obtained from the question include the following:
Initial velocity (u) = 0
Final velocity (v) = 67.8m/s
Time (t) = 5.2secs
Acceleration (a) =..?
a = (v – u)/t
a = (67.8 – 0)/5.2
a = 13.04m/s²
Therefore, the acceleration of the spacecraft is 13.04m/s².
5. Determination of the acceleration of the electron.
Data obtained from the question include the following:
Initial velocity (u) = 0
Final velocity (v) = 2.6x10^5m/s
Time (t) = 6.5x10^-7secs
Acceleration (a) =..?
a = (v – u)/t
a = (2.6x10^5 – 0)/ 6.5x10^-7
a = 4x10^11m/s²
Therefore, the acceleration of the electron is 4x10^11m/s².
6. Determination of the acceleration of the truck.
Data obtained from the question include the following:
Initial velocity (u) = 20m/s
Final velocity (v) = 5m/s
Time (t) = 5secs
Acceleration (a) =..?
a = (v – u)/t
a = (5 – 20)/5
a = –15/5
a = –3m/s².
Therefore, the acceleration of the truck is –3m/s².
Which law describes the magnetic field in a nonlinear wire? A. Faraday's law B. Gauss's law C. Ohm's law D. Ampère's law
Answer:
D. Ampère's law
Explanation:
I got a 5 on plato
The law that describes the magnetic field in a nonlinear wire is Ampère's law. The correct option is D.
What is Ampère's law?Ampère's law is a fundamental law of electromagnetism that describes the relationship between the electric current flowing through a wire and the magnetic field it produces. It states that the magnetic field around a closed loop is proportional to the electric current passing through the loop.
Mathematically, Ampère's law can be expressed as:
∮ B ⋅ dl = μ0I
Where B is the magnetic field, dl is an element of the closed loop, μ0 is the magnetic constant, and I is the current passing through the loop. The integral is taken around a closed path that encloses the current-carrying wire.
Ampère's law is useful in calculating the magnetic field produced by a current-carrying wire or a system of wires. It also helps to understand the behavior of magnets and how they interact with each other.
It is important to note that Ampère's law only applies to steady currents and does not take into account the effects of changing electric fields. For this, Faraday's law of electromagnetic induction is used.
Here in the Question,
A. Faraday's law: This law describes the relationship between a changing magnetic field and an induced electric field. It states that the magnitude of the induced EMF is proportional to the rate of change of magnetic flux.
B. Gauss's law: This law deals with the electric field and its relationship with electric charges. It states that the electric flux through a closed surface is proportional to the charge enclosed within the surface.
C. Ohm's law: This law describes the relationship between current, voltage, and resistance in a conductor. It states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to the resistance of the conductor.
Therefore, The correct answer is D i.e. Ampère's law.
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Help.
1. why does the sun have the greatest amount of gravity in our solar system?
2. Explain why the force of gravity is the greatest between the sun and mercury?
3. why do you think mercury and all of the other planets do not fall into the sun?
Answer:
1.because we are not that near the sun.
2.because mercury is closer to the sun so the Mercury takes the greatest gravity.
3.because of the centripetal force
Two runners ran side by side each holding one end of a horizontal pole. What would most likely happen if one of the runners began jogging in knee-deep water?
Answer:
Hope this helps :)
The runner in the water would be going slower than the other runner. The pole would be in a slanted position and one runner would be ahead of the other.
Explanation:
Water makes you slow down, therefore it would cause the runner jogging in knee deep water to move slower than the runner outside of the water. Because one runner is moving slower than the other, the pole would be in a slanted position.
The runner throughout the water would've been traveling at a moderate speed than some of the other speeds.
This same pole would've been angled, as well as one runner would've been forward of one another. Water slows someone downward immediately, which is why a runner running in lower extremity waters will go slower than that of a racer beyond the waters or pool. Although one runner was traveling slower than another and, the flagpole would've been tilted.Thus the above response is correct.
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Why do you lose balance while standing on a bus often. Need a expert to answer this. Must choose if 1st 2nd or 3rd Newton Law. And explain Please help.
Answer:
The loss of balance while standing on a bus often is due:
The third Newton law.Explanation:
The third Newton law from Latin says: "Action is always opposed an equal reaction: or the two bodies on each other are always equal, and in opposite directions," which means that when a force is exercised in a direction by a body, the other body in the interaction exercises a force in the other direction. In the case of the person on the bus, when the bus makes a force forward, your body makes a force in the other direction (back), in a similar case, when the bus stops, its force in directed to the back, in that time your body make a force forward, in each case your body can lose balance because your center of gravity is directed in the same direction in which the opposite force to that of the bus moves.
A negative charge is moving across a rook from south to north. A magnetic field runs from East to west. In what direction is the magnetic force on the moving negative charge?
A. Toward the East
B. Toward the west
C. Toward the floor
D. Toward the ceiling
Answer:
The magnetic force on the moving negative charge is towards the ceiling.
Explanation:
The magnetic force acting on a wire is given by the relation as follows :
[tex]F=q(v\times B)[/tex]
q is charged particle
v is velocity of charged particle
B is magnetic field
In this case, a negative charge is moving across a rook from south to north. A magnetic field runs from East to west.
q = -q
v =+j
B = -i
So,
[tex]F=-q(vj\times B(-i))[/tex]
Since, [tex]j\times i=-k[/tex]
So,
[tex]F=q(v\times B)(-k)[/tex]
So, the magnetic force on the moving negative charge is towards the ceiling.
Which of the following is an example of a noninfectious disease?
A. hepatitis
B. food poisoning
C.the flu
D. lung cancer
Answer:
D. lung cancer
Explanation:
pls mark brainliest
The turning effect of a force is called a moment. Calculate the moment of a force of 3 N acting 0.2 m from a pivot
Answer:
15 Nm
Explanation:
Moment of the force = force × perpendicular distance from pivot to the line of action of the force
Moment of the force = 3 × 0.2 = 15 Nm
The moment of a force of 3 N acting 0.2 m from a pivot is 15 Newton· meter.
What is moment of force?
Torque is the rotating equivalent of force in physics and mechanics. The moment of force is another name for it (also abbreviated to moment). It illustrates how a force can cause a change in the body's rotational motion.
Mathematically, the definition of moment of force is given as:
Moment of the force = force × perpendicular distance from pivot to line of action of the force.
Given parameters:
Force acting on the object: F = 3 Newton.
Perpendicular distance from pivot to the line of action of force = 0.2 meters.
Hence, Moment of the force = 3 Newton × 0.2 meter = 15 Newton· meter.
So, the moment of a force of 3 N acting 0.2 m from a pivot is 15 Newton· meter.
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