Physics question and answers for August 10, 2023
- Q An 15.0-kg package in a mail-sorting room slides 4.00 mm down achute that is inclined at 59.0 ∘∘ below the horizontal. Thecoefficient of kinetic friction between the package and the...
- Q Alex is riding in a car that has LEDs at each end. The carpasses Jordan, who is standing on the ground 25 m from the car'spath, with velocity 0.8c. Flashes...
- Q Moe and Larry are ice skating at their neighborhood rink. Moe(100 kg) is heading north at 3mys when he collides with Larry (75 kg) who is heading east at2 m/s....
- Q 1) Which one of the following statement about scientifichypothesis is FALSEb) A scientific hypothesis is an explanation for naturalphenomenon.c)In order to be useful, a scientific hypothesis must be testablein a....
- Q There are three possibilities for the shape/curvature of theuniverse: positive curvature (closed), negative curvature (open),and flat curvature. These all imply different things about theultimate fate of the expanding universe. What...
- Q 4. By what factor does tripling the radius of acircleincrease (a) the circumference of the circle? (b) the areaof the circle?5. What are some of the advantages of scientific notation?6....
- Q A fast-moving electron beam strikes a metal target and producesa sharp peak in emission at one frequency as well as thebremsstrahlung continuum emission.a) What causes this peak in X-ray spectrum?...
- Q a) Calculate, in units ofâ„, the magnitude of the maximum total(orbital+spin) angular momentum for an electron in a hydrogen atomfor states with a principal quantum number of 5.b) An electron...
- Q Suppose a certain wavelength of light falls on adiffraction grating and creates an interferencepattern.What happens to the interference pattern if the samelight falls on a grating that has more lines...
- Q A plane leaves the airport in Galisteo and flies 170km at 68.0degrees east of north and then changes direction to fly 230 km at48.0 degrees south of east, and then...
- Q In the diffraction lab, we will use a laser which has wavelengthis 650 nm and aim it at the hair until a clear diffraction patternis visible on the screen or...
- Q Intrinsic carrier density of Ge is 1.7x1019 /m3. It is doped with a pentavalent impurity of 1ppm. Assuming allimpurity atoms are ionized, calculate the factor by which themajority concentration is...
- Q A boron nitride (BN) film was deposited using a reactiveradiofrequency magnetron sputtering substrate. The deposition ratewas 200nm/hr. The XPS compositional analysis showed thatboron-to-nitrogen atomic ratio was 1/1 while the FTIR...
- Q Describe in detail the Hertzsprung Russell (HR) diagram. Includethe information contained on the vertical and horizontal axles, aswell as the location of a Red Super Giant, a high mass mainsequence...
- Q An atom in an l=1 state emits a photon of wavelength 500.000 nmas it drops to an l=0 state when there is no external magneticfield.a)Calculate the Zeeman effect splitting (in...
- Q Light emitting diodes, lasers1. Describe what physical property of a semiconductor will deemit good or bad for use in an LED.2. Describe general operation and configuration of an LED, whatdetermines...
- Q Problem 1. A particle is orbiting a star of mass M in a circularorbit. (a, 2 POINTS) Find the equation that provides the orbitalspeed at a given distance r from...
- Q A block of mass 2M sits at the bottom of a container and iscompletely submerged in a liquid. A second block of mass M sits ontop of the first block...
- Q 1. Two devices that can be used tobreakdown a spectrum into its components are the a. telescope andmicroscopeb. telescope and prismc. diffraction grating and microscoped. prism and diffraction grating2. The...
- Q Show And explain how the action integral and theplanck constant have the same dimension and units.
- Q PN Junctions and breakdown1. Draw and interpret energy band diagram for pn junction inequilibrium, forward, and reverse bias2. Describe what physically happens (And why) when you put n-Siin contact with...
- Q In an aortic aneurysm, a bulge forms where the walls of theaorta are weakened. If blood flowing through the aorta (radius 1.1cm) enters an aneurysm with a radius of 3.0...
- Q Only two horizontal forces act on a 7.7 kg body. One force is7.0 N, acting due east, and the other is 4.3 N, acting 40° north ofwest. What is the...
- Q Four protons are placed in the vertices of a square with a side of 2 x 10-9 m. A fifth protonit is initially on the perpendicular to the square by...
- Q ASTRONOMY for objects outside of the suns orbit. make anexpression that converts the objects radial velocity and d(distance from the Sun). into angular speed and R. where r is thedistance...
- Q When the air temperature is below 0 ?C, the water at the surfaceof a lake freezes to form a sheet of ice.If the upper surface of an ice sheet 24.64cm...
- Q . A lorry with mass 3500 kg is parked at the top of a steep hillwith a 1–in–8 gradient when its handbrake fails. Assume that thelorry has a constant frictional...
- Q Consider a system of five particles inside a container where theenergy levels are evenly spaced. (For instance, the particles couldbe trapped in a one-dimensional harmonic oscillator potential.) Inthis problem, you...
- Q what is action integral?What is it for?(In the calculation ofvariation)
- Q Briefly explain what changing the gravitational force will do tofriction on level ground.  Why does thishappen?  How will this change on a hill?
- Q wanted to understand, what is efficiency in thermodynamics?
- Q Online trolls drive us crazy saying that our cars are big, heavyand that they drive like boats. Well, our solution to everything ismore horsepower. Even, in 1921, the Dodge Brothers...
- Q Q5. Report the slope and uncertainty in the slope of the linearfit on your graph, include the correct units. Q6. Use your reportedslope from the graph to calculate the spring...
- Q A10.0 gram bullet collides with a motionless 1.00 kilogram block ofwood and becomes imbedded in the block. The block is suspended fromabove by strings which are 1.00 meter long (ignore...
- Q A 11 g circular annulus of outer radius 47 cm and inner radius35.2 cm makes small oscillations on an axle through its outer edgeperpendicular to its face.(a) Find its frequency...
- Q Consider a cylindrical capacitor made out of two \"long\" metalcylindrical shells of length L. The outer one has a radius R andthe inner one has a radius r. Now Q...
- Q If energy is always conserved, how can some devices be moreefficient then others?
- Q A stone is dropped from a bridge. A second stone is throwndownwards 2.0 s later with an initial speed of 25 m/s. They bothreach the water below at the same...
- Q Explain in detail how battery size, chemical properties, age,and temperature as well as any other factors that you may think of,cause internal resistance with in a battery
- Q NASA has asked your team of rocket scientists about the feasibilityof a new satellite launcher that will save rocket fuel. NASA's ideais basically an electric slingshot that consists of 4...
- Q Two identical blocks of mass M = 2.60 kg each are initially atrest on a smooth, horizontal table. A bullet of very small mass m =20 g (m << M)...
- Q 1. A one-electron atom has atomic number ?, mass number ? and aspherical nucleus of radius ? . Assume electric charge +?? isuniformly distributed throughout the volume ofthe nucleus. Ignoring...
- Q An n-type silicon wafer undergoes a pre-deposition diffusionprocess with a constant surface concentration of boride gas; theresulting concentration of boron in silicon at the surface isestimated to be 1x1018 atoms...
- Q Can anyone walk me through this please!!-- Build a Monte Carlosimulation model to solve a project problem.Hedoes not provide that information, it just says a probabilisticmodel.
- Q Hot & Cold compress1. What are compresses?2. What conditions would benefit from hot compresses?3. What conditions would benefit from cold compresses?4. How do you create a compress?
- Q An elevator packed with people has a mass of 1900 kg.The elevator accelerates upward (in the positive direction) fromrest at a rate of 1.95 m/s2 for 2.4 s. Calculate thetension...
- Q Explain the relationship between Maxwell’s differential andintegral formulations clearly and neatly. I am asking for anexplanation, not derivation. Will give thumbs up. Again pleasewrite legibly. Thank you
- Q The 1500-kg truck reaches a speed of 50 km/h from rest in adistance of 60 m up the 10% incline with constant acceleration.Calculate the normal force under each pair of...
- Q Temperatures of gases inside the combustion chamber of afour‑stroke automobile engine can reach up to 1000 ∘C.1000 ∘C. Toremove this enormous amount of heat, the engine utilizes a closedliquid‑cooled system...
- Q A novelty collision device known as the executive toy consistsof five identical metal balls. When one ball swings in, aftermultiple collisions, one ball swings out at the other end of...
- Q Would the speed of sound in a monatomic gas like helium be thesame as it would be in air (primarily a diatomic gas)? Why? Assumethat both gases have the same...
- Q What's the Fourier transform of the following equations:1) f(t)=1/(t^2+a^2) a is a constant2) e^[-absolute value(t)/a]*cos(b*t) a and b are constants
- Q 1: A car, A, is stationary with the engine running. A secondcar, car B, passes car A at a constant speed of 12 m/s. at thismoment car A accelerates at...
- Q Coulomb's Law1. What evidence do you see that Newton's third law applies toelectrostatic forces?2. Electric force is a force of attraction or repulsion betweenobjects based on their charges and their...
- Q A chandelier with mass mmm is attached to the ceiling of a largeconcert hall by two cables. Because the ceiling is covered withintricate architectural decorations (not indicated in the figure,which...
- Q Imagine that you are in a rowboat with a crate of fruit. You arehaving a lovely time with our crate, but when you row the boat tothe middle of the...
- Q 7. A cue ball traveling horizontally at 2.5 m/s strikes astationary 8-ball, causing the 8-ball to travel at a 30â—¦ angle withrespect to the horizontal. If the two have the...
- Q Two methods are used to generate 1 GWhe of electricity: (1)burning coal with a generation efficiency of 30% and (2) burningMSW with an efficiency of 25%. (The energy content of...
- Q Calculate the enthalpy of fusion (KJ/mole) for ice using thefollowing lab data:(HINT: Think about the heating curves for H20)Mass of empty calorimeter + stir bar: 255.060 gMass of calorimeter, stir...
- Q What is the reason for the seasons? Explain fully why differenthemispheres experience opposite temperatures at some times of theyear and similar temperatures at others. Identify the months whenthese events occur.
- Q A 52 cm long thin string is attached to a 25 g mass. You bringthe mass up until you make a 4.2â—¦ angle with respect to theequilibrium position and let...
- Q 1. Choose the scenario under which each of the following Dopplershift effects will be seen:choices are:The source and observer are approaching one anotherThe source and observer are moving away from...
- Q An n-type silicon wafer undergoes a pre-deposition diffusionprocess with a constant surface concentration of boride gas; theresulting concentration of boron in silicon at the surface isestimated to be 1x1018 atoms...
- Q A car with inertia 1500kg is driving down a one-way street at 15m. An unobservant sdriver of a 2000kg pickup truck is driving the wrong way downthe street at −10...
- Q Looking at a football match, which of the following describes anevent CONSISTENT with the study of Classical Mechanics?a) The ball gains speed by bouncing into a puddle after a playerkicks.(b)...
- Q briefly describe how different characteristic of motionare reflected by Position vs. time graphs and Velocity vs. timegraphs
- Q Describe static and dynamic methods of determining the forceconstant of a spring.
- Q 5. A giant lollipopconsists of a 280gram 14cm diameter disk onthe end of a 40 gram 25cm long stick. A child is balancing a GIANTlollipop on the end of her...
- Q A pendulum with a length of 35 cm swings back and forth as shownin the figure above, at each turn around point it stops and itstarts accelerating until reaching maxium...
- Q 1. A particle satisfying the time-independentSchrodinger equation must havea) an eigenfunction that is normalized.b) a potential energy that is independent of location.c) a de Broglie wavelength that is independent of...
- Q let R be a region bounded by x = 0 and x =1 and y = 0 and y = 1.Suppose the density is given by 1/y+1.Notice that R is...
- Q Describe the Drude model and the Sommerfeld model: thedifference and the similarity, the successes and the failures ofeach model.
- Q A 45 kg wooden crate is being pushed across awooden floor with a force of 175 N. If, uk = 0.03.What is the acceleration of the crate?
- Q Multiple choice: Suppose you are searching for exoplanets usingthe radial velocity and transit techniques. Which exoplanets areyou most likely to find?(a) Jovian exoplanets orbiting with a large semimajor axis.(b) Jovian...
- Q Why is ionization energy (W) roughly two to three times greaterthan ionization potential (I)?
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