A basketball is tossed up into the air, falls freely, and bounces from the wooden floor. from the moment after the player releases it until the ball reaches the top of its bounce, what is the smallest system for which momentum is conserved? the ball plus player the ball momentum is not conserved the ball plus earth
What is the primary visible color of an emission nebula?
In a scientific experiment, the variable manipulated or controlled by the experimenter is called the
Independent.
The independent variable is manipulated and the effects are noted.
What is the threshold frequency ν0 of cesium?
The threshold frequency fo of Cesium is about 9.39 × 10¹⁴ Hz
[tex]\texttt{ }[/tex]
Further explanationThe term of package of electromagnetic wave radiation energy was first introduced by Max Planck. He termed it with photons with the magnitude is:
[tex]\large {\boxed {E = h \times f}}[/tex]
E = Energi of A Photon ( Joule )
h = Planck's Constant ( 6.63 × 10⁻³⁴ Js )
f = Frequency of Eletromagnetic Wave ( Hz )
[tex]\texttt{ }[/tex]
The photoelectric effect is an effect in which electrons are released from the metal surface when illuminated by electromagnetic waves with large enough of radiation energy.
[tex]\large {\boxed {E = \frac{1}{2}mv^2 + \Phi}}[/tex]
[tex]\large {\boxed {E = qV + \Phi}}[/tex]
E = Energi of A Photon ( Joule )
m = Mass of an Electron ( kg )
v = Electron Release Speed ( m/s )
Ф = Work Function of Metal ( Joule )
q = Charge of an Electron ( Coulomb )
V = Stopping Potential ( Volt )
Let us now tackle the problem!
[tex]\texttt{ }[/tex]
Complete Question:
What is the threshold frequency fo of Cesium?
Note that 1 eV (electron volt) = 1.60×10⁻¹⁹ J ?
[tex]\begin{tabular} {|c|c|c|}\underline{Light\ Energy\ (eV)}& \underline{Electron\ Emitted} & \underline{Electron KE\ (eV)}\\3.87 & no & -\\3.88 & no & -\\ \boxed{3.89} & yes & 0\\3.90 & yes & 0.01\\3.91 & yes & 0.02\end{tabular}[/tex]
Given:
the work function = Φ = 3.89 eV
Asked:
threshold frequency = fo = ?
Solution:
Firstly, we will convert the work function unit as follows:
Φ = 3.89 eV = 3.89 × 1.60 × 10⁻¹⁹ Joule = 6.224 × 10⁻¹⁹ Joule
[tex]\texttt{ }[/tex]
Next, we will calculate the threshold frequensy as follows:
[tex]\Phi = h \times fo[/tex]
[tex]6.224 \times 10^{-19} = 6.63 \times 10^{-34} \times fo[/tex]
[tex]fo = ( 6.224 \times 10^{-19} ) \div ( 6.63 \times 10^{-34} )[/tex]
[tex]{\boxed{fo \approx 9.39 \times 10^{14} ~ Hz}[/tex]
[tex]\texttt{ }[/tex]
Learn morePhotoelectric Effect : https://brainly.com/question/1408276Statements about the Photoelectric Effect : https://brainly.com/question/9260704Rutherford model and Photoelecric Effect : https://brainly.com/question/1458544Photoelectric Threshold Wavelength : https://brainly.com/question/10015690[tex]\texttt{ }[/tex]
Answer detailsGrade: High School
Subject: Physics
Chapter: Quantum Physics
Folding is usually the result of what type of stress
Compressional forces -GradPoint
A car slows down from 24 m/s to rest in a distance of 90 m. what was its acceleration, assumed constant? incorrect: your answer is incorrect. m/s2
What is the name of the concave depression in the central retina for gathering light?
A 25 N force at 60° is required to set a crate into motion on a floor. What is the value of the static friction?
Use the word in a sentence. ( Related to eclipse)
- GIBBOUS
Wave A has an amplitude of 2, and wave B has an amplitude of 2. What will happen when the crest of wave A meets the trough of wave B?
They will interfere to create a crest with an amplitude of 0.
They will interfere to create a crest with an amplitude of 2.
They will interfere to create a crest with an amplitude of 4.
They will bounce off each another.
Answer:
Sample Response: No, the resulting wave in the diagram does not demonstrate destructive interference. The resulting wave in the diagram shows a bigger wave than Wave 1 or Wave 2. If it demonstrated destructive interference, it would be a smaller wave or a horizontal line. With destructive interference, waves break down to form a smaller wave, or cancel each other out, resulting in no wave formation.
A body is placed on a rough inclined plane. Why does the frictional force decrease with the increase of angle of inclination
It is ethical to use deceptive methods in research when the scientific goals of the project can be achieved by non-deceptive methods. nih
What is the thickness of the mantle in km?
The mantle of the Earth is approximately 2900 kilometers thick. It is the largest part of the solid Earth, extending from the base of the crust to the top of the core. It is mainly solid, but can deform and flow under extreme conditions.
Explanation:The Earth's mantle is the largest part of the solid Earth, stretching from the base of the crust downward to a depth of 2900 kilometers. This part of the Earth is largely solid, but due to the extreme temperatures and pressures found in the mantle, the rock can deform and flow slowly. The density in the mantle increases from about 3.5 g/cm³ at the top to more than 5 g/cm³ at the bottom due to the compression produced by the weight of the overlying material.
Samples of upper mantle material are occasionally ejected from volcanoes, allowing scientists to conduct a detailed analysis of its chemical composition. After the mantle, at a depth of 2900 kilometers, we encounter the Earth's core, which is dense and metallic. The core has a larger diameter of 7000 kilometers and is made up of a liquid outer layer and a solid inner layer.
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An incident light ray strikes water at an angle of 20 degrees. The index of refraction of air is 1.0003, and the index of refraction of water is 1.33. The angle of refraction rounded to the nearest whole number is °.
Answer:
15
Explanation:
The longest wavelength of light in the visible spectrum has the color ____________, while the shortest wavelength of light in the visible spectrum has the color _____________
The longest wavelength of light in the visible spectrum has the color Red, while the shortest wavelength of light in the visible spectrum has the color Violet.
What is Electromagnetic Spectrum ?Electromagnetic spectrum is nothing but the range of wavelengths or frequencies on which electromagnetic radiation extend. it is whole distribution of electromagnetic waves according to frequency or wavelength. Electromagnetic wave is nothing but a photon which carries energy. Photon has frequency, wavelength as well as amplitude. Electromagnetic spectrum is show in figure.
Range from 4000 angstrom to 7000 angstrom from violet to red respectively shows the visible light. Infrared light is nothing but the heat we feel from the sun. and ultraviolet light is blacked by ozone layer. we can calculate exact value of temperature of the sun rom Stephan's forth power law.
Hence longest wavelength is red and shortest wavelength is violet in the visible spectrum of electromagnetic wave.
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What is the definition of a point object?
In the first-order spectrum, maxima for two different wavelengths are separated on the screen by 3.40 mm . what is the difference between these wavelengths?
The solution would be like this for this specific problem:
Given:
diffraction grating slits = 900 slits per centimeter
interference pattern that is observed on a screen from the grating = 2.38m
maxima for two different wavelengths = 3.40mm
slit separation .. d =
1/900cm = 1.11^-3cm = 1.111^-5 m
Whenas n = 1, maxima (grating equation) sinθ = λ/d
Grant distance of each maxima from centre = y ..
As sinθ ≈ y/D y/D =
λ/d λ = yd / D
∆λ = (λ2 - λ1) = y2.d/D - y1.d/D
∆λ = (d/D) [y2 -y1]
∆λ = 1.111^-5m x [3.40^-3m] / 2.38m .. .. ►∆λ = 1.587^-8 m
The higher heat capacity of water compared to rock or sediment means that for the same seasonal variation in insolation the land temperature will vary ___________ the ocean.
Final answer:
For the same seasonal variation in insolation, land temperature will vary more than the ocean due to water's higher specific heat capacity, which is about four times greater than that of land. Ocean temperatures are further regulated by vertical circulation currents and evaporation, which mix surface water with cooler, deeper water.
:
The higher heat capacity of water compared to rock or sediment means that for the same seasonal variation in insolation, the land temperature will vary more than the ocean. Water has a roughly four times greater specific heat capacity than land, requiring four times more energy to raise its temperature. Additionally, the process of mixing and evaporation contributes to a larger storage possibility for heat in water. As a result, observed warming over the past century is also smaller over the ocean than over land; about 90% of the observed increase in Earth's heat content has been absorbe by the oceans.
Vertical circulation in the ocean, driven by density differences due to salinity and temperature, mixes surface water with cooler water from deeper layers, further moderating temperature changes. Contrarily, this effect is absent on land, leading to greater temperature fluctuations.
Note: The given explanation in point b. appears to be incorrect as it suggests that sand/soil will take longer to heat and cool, implying a higher specific heat than water, which contradicts the scientific fact that water has a greater specific heat than land. The correct assertion is provided in point d., highlighting that water takes longer to heat and cool, indicating its higher specific heat capacity.
Jupiter contains a number of small moons that are thought to be captured comets or material ejected by collisions with larger objects. what is the evidence for this theory?
I believe the evidence for this theory is that:
The orbits surrounding Jupiter are highly elliptical which are off the plane of the ecliptic, and many of these moons are retrograde. This is very unlikely for moons or satellites which are formed during the planetary accretion. Hence comes the theory.
Unless otherwise posted, what is the speed limit in a school zone? florida
Why does earth have the strongest magnetic field among the terrestrial worlds? why does earth have the strongest magnetic field among the terrestrial worlds? it is the only one that has both a partially molten metallic core and reasonably rapid rotation. it rotates much faster than any other terrestrial world. it is the most volcanically active world. it is the only one that has a metallic core. it is by far the largest terrestrial world?
The Earth has the strongest magnetic field among the terrestrial worlds due to its partially molten metallic core and rapid rotation. These factors create convection currents and electric currents that generate the magnetic field.
Explanation:The Earth has the strongest magnetic field among the terrestrial worlds because it is the only one that has both a partially molten metallic core and reasonably rapid rotation. These two factors are essential for generating a magnetic field through a process called the dynamo effect.
The Earth's molten, iron-rich outer core and its rotation create convection currents that generate electric currents, which in turn produce a magnetic field.
By having a partially molten metallic core, the Earth is the only terrestrial world capable of generating a magnetic field. Other terrestrial worlds, such as the Moon or Mars, have solid cores and lack the necessary convection currents to generate a magnetic field.
Additionally, the Earth's reasonably rapid rotation helps sustain its magnetic field. The rotation of the Earth causes the convection currents in the outer core to twist and rotate, which further amplifies the magnetic field strength.
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Scientists have determined that light is made up of electromagnetic waves light is made up of particles called photons light is both a longitudinal wave and a particle both a and b
which is an organic compound?
0 the period of a pendulum is the time it takes the pendulum to swing back and forth once. if the only dimensional quantities that the period depends on are the acceleration of gravity, g, and the length of the pendulum, ℓ, what combination of g and ℓ must the period be proportional to? (acceleration has si units of m ∙ s-2.).
The period of a pendulum is proportional to the square root of the ratio of its length to the acceleration of gravity.
Explanation:The period of a pendulum depends on the acceleration of gravity, g, and the length of the pendulum, ℓ. In order to determine the combination of g and ℓ that the period is proportional to, we can use the method of dimensional analysis. The only possible combination is the square root of the ratio of ℓ to g, which gives us T ∝ √(ℓ/g).
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Electrical shock is more likely to be fatal when the path of current is through the
which is a way that biotechnology has not helped society
A: Bacteria is used to grow vaccines in large quantities
B: Drugs can be devolped without the use of animal research
C: New, stronger bacteria have evolved that are resistant to antibiotics
D: Diabetics have a steady supply of inexpensive insulin
A 12V battery runs a 30 amp car stereo. What is the resistance of the circuit?
5. From the definition of work, explain why only the vertical height of the stairs is measured. Hint: Think of the data table column headed “Increase of GPE."
Only the vertical height of the stairs is used to calculate work related to gravitational potential energy because work done by gravity is only dependent on vertical displacement. The formula W = mgh is used, where h is the vertical height, which directly increases the gravitational potential energy when climbing stairs.
The reason why only the vertical height of the stairs is measured when calculating work related to an increase in gravitational potential energy (GPE) is that work done by gravity depends only on the vertical displacement in the gravitational field. In the context of climbing stairs, the person does work against the gravitational force to increase their GPE, which is calculated as mgh, where m is mass, g is the acceleration due to gravity, and h is the vertical height. The work going into mechanical energy is given by W = KE + PE. Initially, at the bottom of the stairs, both kinetic energy (KE) and GPE are zero. As a person climbs the stairs, the GPE increases while KE remains unchanged if they climb at a constant speed, making the GPE the significant term in the work-energy equation (W = mgh). We can then calculate work and divide it by time to determine the power output.
When you are passing a large truck, you need to make sure you can see a lot of pavement in front of the truck before you pull back in front of it?
Explanation:
While driving on the road we should be alert and cautious at every point of driving. We should also follow the basic traffic rules for ours as well as others safety. So when passing by a large truck, we should make sure that we see a lot of the pavement area in front of the truck so that we are aware of the fact that there is enough space in front of the truck for us to apply brake and halt our car incase if there is any danger ahead. And also if the truck happens to stop suddenly, we get enough space to stop for our safety. Also to see if there is any obstacles ahead so that we do not hit the obstacle and meet with accidents.
If you combine 240.0 mL of water at 25.00 °C and 120.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.
The final temperature of the mixture is 48.33° C.
What is temperature?The term "temperature" describes how hot or cold a body is. It is, specifically, a method of calculating the kinetic energy of the particles that make up an item. When particles move more quickly, the temperature rises, and vice versa.
Given parameters:
Volume of the water at 25.00° C, V₁ = 240.0 mL.
Volume of the water at 95.00° C, V₂ = 120.0 mL.
The density of water, ρ = 1.00 g/mL
Then, final temperature, t = ?
Mass of the water at 25.00° C, m₁ = V₁ρ = 240.0× 1 g = 240.0 g.
Mass of the water at 95.00° C, m₁ = V₁ρ = 120.0× 1 g = 120.0 g.
We know that, specific heat of water, s =1 CGS unit.
Then, the amount of heat energy absorbed by the water at 25.00° C to reach final temperature (t), is H₁ = m₁s(t-25) Joule =240(t-25) Joule.
And the amount of heat energy dissipated by the water at 95.00° C to reach final temperature (t), is H₂ = m₂s(95 - t) Joule = 120 (95 - t) Joule.
From the conservation of heat energy,
H₁ = H₂
⇒ 240(t-25) = 120 (95 - t)
⇒ 2(t -25) =(95 -t)
⇒ 3t = 95 + 2×25 = 145
⇒ t = 48.33
Hence, the final temperature of the mixture = 48.33° C.
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