how to calculate the wavelength of electromagnetic radiation needed to remove an electron from the valance shell of an atom of the element
Answers
Tocalculate the wavelength of electromagnetic radiation needed to remove an electron from the valance shell of an atom of the element can be calculated using the equation: E = hc/λ
Where E is the energy required to remove the electron from the valence shellh is Planck's constanctc is the speed of lightλ is the wavelength of the electromagnetic radiation usedThe energy required to remove an electron from the valence shell of an atom is known as ionization energy.
Once you know the ionization energy of the element, you can use the above equation to calculate the wavelength of electromagnetic radiation needed to remove an electron from the valence shell of the atom of the element. The wavelength calculated will be the minimum wavelength required to remove the electron from the valence shell of the atom. So therefore the wavelength of electromagnetic radiation needed to remove an electron from the valance shell of an atom of an element can be calculated using the equation: E = hc/λ.
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Related Questions
how does velocity affect range
Answers
Explanation:
The range of a projectile on even ground is:
R = v₀² sin(2θ) / g,
where v₀ is the initial velocity, θ is the angle from the horizontal, and g is the acceleration due to gravity.
Therefore, the range is directly proportional to the square of the initial velocity. So as the initial velocity increases, range also increases.
A duck flies in a straight line for 500m (60° N of W)
a.) What angle is this in polar coordinates?
b.) What is the North/South and East/West components of its displacement?
Please help me t-t
Answers
(A) The angle of this in polar coordinates is 30⁰.
(B) The North/South and East/West components of its displacement is 250 m and 433 m respectively.
The angle is this in polar coordinates60° N of W lies in the fourth quadrant;
θ = 90 - 60 = 30⁰
in polar coordinate = (r,θ) = (500 m, 30⁰)
Vertical component of the displacement (North/South)Dy = D sinθ
Dy = 500 m x sin(30) = 250 m
Horizontal component of the displacement (East/West)Dx = D cosθ
Dx = 500 m x cos(30) = 433 m
Thus, the angle of this in polar coordinates is 30⁰.
The North/South and East/West components of its displacement is 250 m and 433 m respectively.
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Sensory memory lasts:
Answers
Answer:
Sensory memory lasts a few hundred milliseconds. (milliseconds to seconds)
Explanation:
Using Ohms Law, calculate the current that would exist in a circuit having a voltage of 240V experiencing 110 Ohms of resistance
Answers
To find the Voltage, ( V ) [ V = I x R ] V (volts) = I (amps) x R (Ω)
To find the Current, ( I ) [ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω)
To find the Resistance, ( R ) [ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps)
To find the Power (P) [ P = V x I ] P (watts) = V (volts) x I (amps)
A penny is made of the element zinc plated with the element copper; a nickel is made of a mixture of the elements nickel and copper. Some isotopes of various elements are listed below by their atomic number and mass number. Use the periodic table on p. 131 to identify which atoms you would expect to find in the penny, which you would expect to find in the nickel, which you would expect to find in both, and which you would expect to find in neither coin.
Answers
Answer: We need the referenced table to discern which isotopes are likely to be found. But there is still an interesting piece of information.
Explanation:
An interesting story behind the US penny. It has been around since 1787 and consisted of primarily a copper, or copper-plated coin. In 1982 the design was changed, due to the high price of copper. A zinc core was copper plated to have the same appearance, but less expensive composition. If one of these pennies is slightly filed to expose the zinc, it can be placed in a strong acid that will react with and dissolve the zinc core. Fun, but a waste of money.
Answer:
in the penny Cooper(Cu),un the nickel nickel(Ni),in both Cooper(Cu)
Explanation:
How many degrees Celsius is 57.39o F?
Answers
Given,
The temperature in Fahrenheit, F=57.39 °F
The temperature can be converted from degree Fahrenheit to degree celcius using the formula,
\(C=\frac{5}{9}(F-32)\)On substituting the known values,
\(\begin{gathered} C=\frac{5}{9}(57.39-32) \\ =14.11^{\circ}\text{C} \end{gathered}\)Thus 57.39 °F in degree celcius is 14.11 °C
a race car is moving at a constant speed around a track.What about the race car is changing and why
Answers
velocity is speed but with direction and since the car is moving AROUND the track it means the direction is changing so the velocity is changing
A race car is moving at a constant speed around a track. The race car is changing its velocity as the direction of motion changes.
What is velocity?The primary indicator of an object's position and speed is its velocity. It is the distance that an object travels in one unit of time. The displacement of the item in one unit of time is the definition of velocity.
The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.
As the race car is moving at a constant speed around a track, the magnitude of velocity remains same but during race it may changes its direction of motion, that is why, velocity of it, which depends on both magnitude and direction, may changes.
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A little green moon person stands by the rim of a crater on the Moon, where
the freefall acceleration is 1.62 m/s2 and there is no air resistance. The crater
has vertical walls. To determine the depth of the crater, she drops a rock and
measures the time it takes for it to hit the bottom. If the depth of the crater is
120 m, after what time interval will the rock hit the floor of the crater?
Answers
Answer:
Time:
t = 12 s
Explanation:
Given:
g = 1.62 m/s
H = 120 m
V₀ =0 m/s
__________
t - ?
From the formula:
H = V₀·t + g·t² / 2
H = g·t² / 2
we find the time:
t = √ (2·H / g)
t = √ (2·120 / 1.62) ≈ 12 c
which part of the spectrum is absorbed and which part reflected when white light falls on the blue sweater? to select the answer, click on the outer grey edge of the spectrum adjacent to the appropriate part.
Answers
Only blue light can be reflected or transmitted by a substance that absorbs wavelengths longer than blue.
Is all light reflected in white?
We are aware that white items reflect white light because they contain white pigments. White things reflect all light and do not absorb any since white is the culmination of all light.
Only red and green light will be reflected off the garment if it absorbs blue light. As a result, only red and green light will reflect from the shirt when red, green, and blue light are shining upon it. Because yellow always appears when red and green light strike your sight, the garment will appear yellow. This serves to clarify how color subtraction works.
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If a laboratory fire erupts, immediately is it A. Notify your instructor. B. Run for the fire extinguisher or C. Throw water on the fire. D. Open the windows.
Answers
Answer:
b
Explanation:
if there is a fire there is no time to waist
The answer depends on depends on your age and your capacities:
If you are a child, the correct option is A.
If you are a scientist adult, the correct option is B.
I will assume that you are a child, so you shouldn't be in any danger. In a laboratory, we can find a lot of glass and flammable things, so it is really dangerous to be near a fire.
Then really easily we can conclude that the correct option is A, immediately notify your instructor (who should have the knowledge to handle the situation)
Never try to handle it by yourself, especially never throw water on the fire, as there are a lot of cases (like if some oil starts combusting) where throwing water will make the situation a lot worst.
Now, if you are an adult and you are instructed in how to handle lab hazards, you should know where the nearest fire extinguisher is, then you can run to get it and extinguish the fire before it goes out of control.
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You weigh 710 N. What would you weigh if the Earth were three times as massive as it is and its radius were five times its present value? Answer in units of N
Answers
Answer:
85.2 N
Explanation:
You want to know your weight if the Earth were 3 times as massive and had 5 times the present radius. Your weight is 710 N.
WeightYour weight is proportional to the mass of the Earth and the square of the radius between your mass and the center of the Earth. The revised dimensions of the earth would multiply your weight by ...
W = k(M/r²) = 710 N
W' = k((3M)/(5r)²) = k(M/r²)(3/25) = (710 N)(3/25) = 82.5 N
Your weight would be 82.5 N.
For 3.5 seconds, an ostrich ran west at 2.6 meters per second. In that time, how far did it
run?
Write your answer to the tenths place.
Answers
The distance covered by an ostrich in 3.5 seconds by running at the speed of 2.6 meters per second is 9.1 m.
What is distance?
Distance is the measurement of how far the objects under consideration are. It can be measured in terms of meters, centimeters, kilometers etc. Distance is a scalar quantity unlike displacement which is a vector quantity.
The distance covered by an ostrich can be calculated as, d = s * t
where d is distance, s is speed and t is the time taken.
d = 2.6 ms^-1 * 3.5 s = 9.1 m.
Therefore, the ostrich ran for 3.5 seconds to cover 9.1 m distance at the speed of 2.6 meters per second.
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If your mass is 63.7 kg, and you are standing 7.5 m away from a boulder witha mass of 0.750.6 kg, what is the gravitational force between you and theboulder ? Newtona taw of gravitation is gravity = amputa, The gravitationalconstant Gis 6.67 10-11 Nm/kgA. 9.82* 10-NB. 7.37* 10-NC. 552* 10-ND. 1.10*10N
Answers
The gravitational force is given as:
\(F=G\frac{m_1m_2}{r^2}\)Plugging the values given we have:
\(\begin{gathered} F=(6.67\times10^{-11})\frac{(63.7)(9750.6)}{(7.5)^2} \\ F=7.37\times10^{-7} \end{gathered}\)Therefore the answer is B.
The diagram shows how states of matter can change when energy is either added or removed.
System before change
System after change
00000
00000
00000
00000
00000
00000
00000
All of these statements below are true EXCEPT
Energy was added to the matter causing the particle movement to increase.
The matter changed states which is a physical change.
The particles in the matter before the change had more energy than after the change.
The particles in the matter before the change had less energy than after the change
Answers
A change in temperature frequently causes substances to change phases. Most substances are solid at low temperatures; as the temperature rises, they become liquid; and at still greater temperatures, they become gaseous.
Melting is the conversion of a solid into a liquid (an older term that you may see sometimes is fusion). Solidification is the process where a liquid turns into a solid. The melting point, or the temperature at which a pure substance begins to melt, is a property of that substance. A solid must expend energy to become a liquid. A specific quantity of energy is required by every pure substance in order to transform from a solid to a liquid. This amount is known as the substance's enthalpy of fusion (or heat of fusion).
The complete question is- The diagram shows how states of matter can change when energy is either added or removed.
System before change
System after change
00000
00000
00000
00000
00000
00000
00000
All of these statements below are true EXCEPT
Energy was added to the matter causing the particle movement to increase.
The matter changed states which is a physical change.
The particles in the matter before the change had more energy than after the change.
The particles in the matter before the change had less energy than after the change.
the diagram is attached below.
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Manuel was watching his younger siblings on the swing set. He had just learned about kinetic and potential energy in school. He wondered about energy's role in the back-and-forth movement of a swing. Which statement do you think explains the energy of the swing best
A.When a person is at the highest point of a swing, there is no energy, because he is not moving
B. A person has the most energy at the lowest point of the swing,because there he is moving fastest
C.The total amount of energy remains the same. It just changes from one form to another as the person swings back-and-forth.
Explain your thinking about the energy of the swing.
Answers
The total amount of energy remains the same. It just changes from one form to another as the person swings back-and-forth. Statement (C) is true.
What is energy?Energy is the ability to perform work in physics. It could exist in several different forms, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc. Additionally, there is heat and work, which is energy being transferred from one body to another.
When Manuel was watching his younger siblings on the swing set; the motion of swinging is a kind of simple harmonic motion where total energy remains conserved. But kinetic and potential energy are continuously exchanged in simple harmonic motion.
Potential energy is at its peak and kinetic energy is zero when you are farthest from the equilibrium point. The kinetic energy is at its peak and the potential energy is zero at the equilibrium point. The oscillating body's kinetic and potential energy values change at other points in its motion. So, the total amount of energy remains the same. It just changes from one form to another as the person swings back-and-forth.
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a disc is at rest. a piece of clay collides with the edge of the disc and sticks, causing it to rotate clockwise around the frictionless axle at its center.
Answers
When a piece of clay collides with the edge of a stationary disc and sticks, it causes the disc to rotate clockwise around its frictionless axle at the center.
The collision between the piece of clay and the edge of the disc results in the transfer of angular momentum from the clay to the disc. Initially, the disc is at rest, so its angular momentum is zero. However, when the clay sticks to the disc, it adds its own angular momentum to the system. According to the law of conservation of angular momentum, the total angular momentum of the system remains constant.
The clay's angular momentum is nonzero because it has a tangential velocity due to its collision with the edge of the disc. By sticking to the disc, the clay transfers this angular momentum to the disc, causing it to start rotating. Since the clay collides with the edge and sticks, it exerts a torque on the disc, resulting in the disc's clockwise rotation around its frictionless axle. The rotational motion of the disc continues until an external torque is applied to the system or until the disc's angular momentum is dissipated through friction or other means.
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When a piece of clay collides with the edge of a stationary disc and sticks, it causes the disc to rotate clockwise around its frictionless axle at the center.
The collision between the piece of clay and the edge of the disc results in the transfer of angular momentum from the clay to the disc. Initially, the disc is at rest, so its angular momentum is zero. However, when the clay sticks to the disc, it adds its own angular momentum to the system. According to the law of conservation of angular momentum, the total angular momentum of the system remains constant.
The clay's angular momentum is nonzero because it has a tangential velocity due to its collision with the edge of the disc. By sticking to the disc, the clay transfers this angular momentum to the disc, causing it to start rotating. Since the clay collides with the edge and sticks, it exerts a torque on the disc, resulting in the disc's clockwise rotation around its frictionless axle. The rotational motion of the disc continues until an external torque is applied to the system or until the disc's angular momentum is dissipated through friction or other means.
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Where is the water table located?
Answers
Answer:
The water table is the upper surface of the zone of saturation. The zone of saturation is where the pores and fractures of the ground are saturated with water. It can also be simply explained as, the upper level, below which the ground is saturated.
The quotient of 8.4x10° and a number n results in 5.6x 1027. What is the value of n?
1.5x10-18
O 1.5x10
O 1.5x10³
1.5x10¹8
Answers
a spaceship travels from a planet to a moon and passes through the three positions a, b, and c, shown above. position b is midway between the centers of the planet and the moon. the planet has a larger mass than the moon. at which location could the net gravitational force exerted on the spaceship be approximately zero?
Answers
The location at which the net gravitational force exerted on the spaceship is approximately zero is position c. The correct option is c.
What is gravitational force?Gravity, also known as gravitational force, pulls objects with mass toward one another. We frequently consider the force of gravity from Earth. This force is responsible for keeping your body on the ground.
Any item with mass, on the other hand, exerts a gravitational force on all other objects with mass. There is a net force because the force exerted by the Earth exceeds the force exerted by the Moon.
Therefore, the correct option is c, position C.
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The question is incomplete. Your most probably complete question is given below:
The image is also added below:
A. position A.
B. position B.
C. position C.
D. cannot be determined.
A force of 900N acts on
a stationary body
for 40sec and the body acquires the velocity of360 m/s calculate mass a body.
Answers
Answer:
Explanation:
It is still using F = m*a -- just in a disguised form.
Givens
F = 900 N
vf = 360 m/s
vi = 0
t = 40 second
Formulas
a = (vf - vi)//t
F = m * a
Solution
a = (360 - 0)/ 40
a = 9
F = m * a
900 = m * 9
m = 900/9
m - 100 kg. Doesn't seem high enough.
Answer:
a= V- u/t
a= 360 - 0 /40 = 9 m/sec2
F = MA
900 = M * 9
M = 900/9
M= 100 kg
Suppose the surface temperature of the Sun were about 12,000K, rather than 6000K. How much more thermal radiation would the Sun emit?
Answers
The required thermal radiation emitted by the Sun is calculated to be 16 times greater than the radiation.
We know that the energy emitted from the thermal radiation is is proportional to temperature raised to the power 4.
Thermal radiation ∝ T⁴
where,
T is temperature
The energy of the hot sun can be written as σ Thot⁴ = σ(12000)⁴
The energy of the cold sun can be written as σ Tcold⁴ = σ(6000)⁴
The ratio of both the energies is calculated to be,
⇒ σ(12000)⁴/σ(6000)⁴ = 16
Thus, the required energy output of the Sun is 16 times greater.
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What is an example of Newton's First Law of Motion?
Answers
Hope this helps! (:
how can a rocket change direction when it is far out in space and is essentially in a vacuum? cite physics principles that apply.
Answers
A rocket can change direction in space by utilizing the principle of conservation of momentum and employing various propulsion techniques.
Newton's third law states that for every action, there is an equal and opposite reaction. Rockets take advantage of this principle by expelling high-velocity exhaust gases in one direction, resulting in a reactive force that propels the rocket in the opposite direction, allowing it to change its direction of motion.
To change direction, a rocket can use thrusters or engine gimballing. Thrusters are small engines that can be fired in different directions to provide the necessary force for altering the rocket's path. Engine gimballing involves swiveling the rocket engine, allowing the exhaust gases to be expelled at an angle, thus changing the direction of the rocket.
Another method involves gravity assists or slingshot maneuvers. By utilizing the gravitational pull of celestial bodies, such as planets or moons, a spacecraft can change its trajectory and direction. The spacecraft can perform a carefully calculated flyby, using the gravity of the celestial body to gain speed or alter its trajectory.
In summary, rockets change direction in space by utilizing the principles of conservation of momentum, Newton's third law, and employing techniques like thrusters, engine gimballing, or gravity assists. These methods enable the spacecraft to alter its course and navigate effectively even in the vacuum of space.
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You throw a dodge ball with a mass of 2.1 kg. The ball leaves your hand with a speed of 25 m/s. Identify the energy (PE or KE) and calculate it.
Answers
Given,
The mass of the object, m=2.1 kg
The speed of the object, v=25 m/s
Kinetic energy is the energy that an object possesses due to its motion. And potential energy is the energy that an object possesses due to its position.
The gravitational potential energy depends on the height of the object. As the change in the height of the object is not mentioned in the question, let us assume that there is no change in the potential energy.
The velocity of the object, however, changes. Thus the energy possessed by the object is the kinetic energy.
And the kinetic is given by
\(E_K=\frac{1}{2}mv^2\)On substituting the known values,
\(\begin{gathered} E_K=\frac{1}{2}\times2.1\times25^2 \\ =656.25\text{ J} \end{gathered}\)Thus the kinetic energy of the ball is 656.25 J
A spacecraft flies within 500,000 km of each of these planets. Based on its mass, which planet would gravitationally attract the spacecraft the least?
Answers
Answer:
Mars
Explanation:
It would be Mars because Mars has the least mass out of al the planets in the Solar System, and that would affect its gravitational pull.
I hope it helps! Have a great day!
Anygays-
Calculate the pressure on the bottom of a swimming pool 3. 5 m deep. How does the pressure compare with atmospheric pressure, 105 Pa? (density of water=1000kg/m3 ).
Answers
Answer:
1.343 atm
Explanation:
The mass of water above 1 square meter of swimming pool bottom is ...
M = (3.5 m)·(1000 kg/m^3) = 3500 kg/m^2
Then the force exerted by the water on the pool bottom is ...
F = Mg = (3500 kg/m^2)(9.8 m/s^2) = 34300 N/m^2 = 34300 Pa
Compared with atmospheric pressure, this is ...
34,300/10^5 = 0.343 . . . . atmospheres
Added to the atmospheric pressure on the water's surface, the total pressure on the pool bottom is 1.343 atmospheres.
E-mail is usually a poor choice for the distribution of sensitive electronic files because
A paper copies seem more official than e-mail
B. not all computers can read e-mails correctly
C. it is easy to send e-mail to the wrong person
D. e-mail is saved on the server that transfers it
Answers
Answer:
it's D
Explanation:
its on edge
A student pushes a 40-N block across the floor for a distance of 10 m. How much work was done to move the block? 4 J 40 J 400 J 4,000 J.
Answers
Answer:
\(\boxed {\boxed {\sf 400 \ J}}\)
Explanation:
Work is a force that causes the displacement of an object. It is the product of force and displacement.
\(W=Fd\)
The force is 40 Newtons and the displacement is 10 meters.
F=40 N d=10 mSubstitute the values into the formula.
\(W= 40 \ N * 10 \ m\)
Multiply.
\(W= 400 \ N*m\)
Convert the units. 1 Newton meter is equal to 1 Joule, so our answer is equal to 400 Joules.
\(W= 400 \ J\)
400 Joules of work was done to move the block.
Answer:
400 J
Explanation:
This is the correct answer for k12
What does Newton's first law of motion state? (3 points) a Every action has an equal and opposite reaction. b A body at rest will stay at rest until it is acted upon by another object. c The amount of force acting on an object is equal to its mass times its acceleration. d All objects that have mass attract each other with a force that depends on their mass.
Answers
Answer:
B) A body at rest will stay at rest
Explanation:
A body in motion will stay in motion unless acted on by another force.
The centripetal force on an object in circular motion is.
Answers
Answer:
The direction of a centripetal force is toward the center of rotation, the same as for centripetal acceleration. According to Newton's second law of motion, a net force causes the acceleration of mass according to Fnet = ma.
Explanation:
I am sorry if it is wrong