Why do you suppose Millikan tried several kinds of oil, as well as H2O and Hg, for his oil-drop experiment.

Q: What is a rest-frame spectrum of a typical BCG?

A: BCG's are bright cluster galaxies are the brightest galaxies among group of galaxies. there are many…

Q: Randomized Variables n = 1.1 x 10° kg == 25 km/s > A 50% Part (a) Find the relativistic momentum of…

A:

Q: Kane tic energY for an oblect With mass maud Velo city u given by: equation KE-L mV

A:

Q: Change in kinetic energy is measured as O (mv)? O (1/2) (mv) O (1/2 )(mv²) O (1/2) (mv)2 O (1/2)…

A: Required:  Formula of change in Kinetic Energy

Q: Derive the expression for the temperature of Hawking radiation as a function of the Planck mass and…

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Q: Which of the following would you use to dislodge an interior electron from an atom? An interior…

A: Synchrotron accelerate electron and proton synchrotron accelerate proton.

Q: What is the total energy of a proton whose kinetic energy is 25 GeV? What is its wavelength?

A:

Q: What wavelength photon would be required to ionizea hydrogen atom in the ground state and give the…

A: Given that : K.E. = 11.5 eV Ionization energy (I.E.) to transition a photon from ground to excited…

Q: What is the wavelength of the most energetic photon that can be emitted from a muonic atom with Z=1?

A: The electron on gaining energy becomes excited. They then jump from lower orbit to higher orbit. It…

Q: Holes are injected into n-type Ge so that at the sample surface Apo 1014 cm³. Calculate Ap (cm³) at…

A: GIVEN: ∆P0=1014cm-3tp=10-2sDp=49cm2/sx= 2mm or 2×10-1cm

Q: What is the energy of photons (joules) emitted by a91.7-MHz FM radio station?

A: Energy of a photon is, E=hf

Q: Discuss the relation E=mc2 and its importance.

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Q: What is Helmholtz free energy ?

A: Helmholtz free energy is a thermodynamics concept in which, thermodynamic potential is used to…

Q: In muonic hydrogen, the electron in hydrogen has been replaced by a muon. For the muonic hydrogren:…

A:

Q: What correlation do you see between the double-slit experiment results and our ‘status quo’ in…

A: In Young's double-slit experiment double sources are created from the single source. So the sources…

Q: Most radiation detectors are gas-filled and solid-state detectors, but liquid scintillation…

A: Gas filled detectors are one of the most commonly used radiation detectors. They work on the general…

Q: Explain the electroweak theory.

A: The electroweak theory that explains both the electromagnetic and weak forces in physics. These…

Q: erive the Stefan-Boltzmann law from Planck's law. No handwriting please

A: We have to use Planck’s law to derive the Stefan-Boltzmann law.

Q: Although muons have a half-life of 2.2 µs, physical chemists have been able to construct various…

A: Given data: m = 1.88 ✕ 10−28 kg Need to determine the Bohr radius (in m) of this muonic hydrogen in…

Q: From Wien’s displacement law, the peak wavelength of the spectral radiation is inversely…

A:

Q: 37 The wavelength at which a thermal radiator at temperature T radiates electromagnetic waves most…

A: (a) Energy of the photon

Q: A galaxy moving away from the earth has a speed of 0.0100c . What wavelength do we observe for an ni…

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Q: 3. Two photopeaks due to two g-rays of energies 1172 keV and 1332 keV of 60Co falls on channels 3516…

A: Given : E1=1172 keV              E2=1332 keV              C1=3516              C2=3996…

Q: The 6563 Å Hα line emitted by hydrogen in a star is found to be redshifted by 15 Å. Estimate the…

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Q: Use Wien’s law to answer the following questions: (a) The cosmic background radiation peaks in…

A: According to Wien’s law, The temperature in this case can be obtained as

Q: Derive the relationship between root mean square velocity and most probable velocity. The root mean…

A: The root mean square velocity of hydrogen is 21 × 105 cm sec–1.

Q: how much energy does it take to singly ionize it?

A:

Q: How are the Stefan-Boltzmann law and the Wien displacement law related to the planck black-body…

A: Wien's Law : according to this law the product of the equilibrium temperature of the black body and…

Q: Who measures the proper time between the emission of the particle and the detection by Diana? a)…

A: Eduardo measures the proper time between the emission of the particle and the detection by Diana.

Q: Your uncle is trying to convince you to join his research team at CERN by offering you a summer job…

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Q: How did Edwin Hubble use the concepts of the Doppler Effect to determine the speed/direction of…

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Q: How many days does it take for a perfect blackbody cube (0.0100 mon aside, 30.0 8C) to radiate the…

A: The given values are,  a=0.0100 mT=30.0°C=303 KQ=100 W1 hr=100 W3600 s=360,000 W·sA=6a2=60.0100…

Q: Gather the information and try to correlate it with these equations: v = c λ-1  and E = hv thus, E…

A:

Q: The peak intensity of the CMBR occurs at a wavelength of 1.1 mm. (a) What is the energy in eV of a…

A: The wavelength,

Q: What is the wavelength of a 50-GeV electron, which is produced at SLAC? This provides an idea of the…

A: Write the expression to determine the wavelength,

Q: In UARM and free fall g is always negative (-) * O True False

A: solution as

Q: How does tan ^-1 work when given x and y?

A: With the help of the given vector components, such as (2, 4), one can easily convert this to the…

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.