Physics question and answers for August 12, 2023
- Q an optical system consists of an optical lens and a concavemirror, the focal length of length is f=20​cm, the distance betweenobjective and lens is 30, the distance between lens and...
- Q A.) Sunlight strikes a piece of crown glass at an angle ofincidence of 31.5deg. Calculate the difference in the angle ofrefraction between a yellow (580 nm) and a violet (410...
- Q 1. In the lab, a student has created an oscillator by hanging aweight from a spring. The student releases the oscillator from restand uses a sensor and computer to find...
- Q Bobsleds racing down a bobsled run often suffer glancingcollisionswith the vertical walls enclosing the run. Suppose that abobsled of 600 kg traveling at 120 km h approaches a wall atan...
- Q A bicycle racer sprints at the end of a race to clinch avictory. The racer has an initial velocity of 11.0 m/s andaccelerates at the rate of 0.350 m/s2 for...
- Q Determine which of the following observations aretestable. For those that are testable:• Determine if the observation is qualitative orquantitative.• Write a hypothesis and a null hypothesis.• What would be your...
- Q A railroad car moving at a speed of 3.20 m/s overtakes,collides, and couples with two coupled railroad cars moving in thesame direction at 1.20 m/s. All cars have a mass...
- Q A vacuum tube diode consists of concentric cylindricalelectrodes, the negative cathode and the positive anode. Because ofthe accumulation of charge near the cathode, the electric potentialbetween the electrodes is not...
- Q Bart and Lisa are sitting on a merry-go-round of a certainradius. Bart sits halfway out from the center of the merry-go-roundwhile Lisa sits right on the edge. The merry-go-round is...
- Q A wall in a building has a width of 15 m and a height of 3 m. Itis made of several layers — a layer of motionless air with an...
- Q what are the applications and technologies in each layer ofatmosphere
- Q What is the puzzle of the Sea Battle, and how is it to besolved?
- Q Inyour own words, explain electric potentials, charged conductors,and capacitors. Also give examples. this should be done inwords
- Q Earth has a mass of 6.0 x10^24 kg and the moon 7.3 x 10^22 kg.The center of the moon is 238,900 miles from the center ofEarth.The moon goes around the...
- Q What is the best way to design an argon laser that emits at501.7 nm?
- Q A baseball has a mass of 3kg and is thrown off a roof with ahorizontal velocity of 55m/s with a drag coefficient of 33Ns/m.The baseball falls for 5s before hitting...
- Q From t = 0 to t = 4.66 min, a man stands still, and from t =4.66 min to t = 9.32 min, he walks briskly in a straight line...
- Q what produces a torque on the boat and what effect does it haveon the boat?
- Q A child bounces in a harness suspended from a door frame bythree elastic bands.(a) If each elastic band stretches 0.200 m while supporting a6.35-kg child, what is the force constant...
- Q In the figure here, a red car and a green car move toward eachother in adjacent lanes and parallel to an x axis. At timet = 0, the red car...
- Q Describe the difference between threshold and non-threshold doseresponse curves. Give one example of a disease or condition thatfall into each category. (2 points)
- Q Please show how to Graph the Vector Sets. And Solve for itanalytically.Part A: Experimental Determination of theEquilibrant-Obtain three sets of vectors, two sets of two and one set ofthree.Use a...
- Q Galactic Dynamics. Imagine that you are an occupant of astrange, distant galaxy, living on a planet in a solar system 10kpc away from the galaxy's center. Looking along a galacticlongitude...
- Q Emission lines from the hydrogen Hβ line (rest wavelength of486.1 nm) are observed in the spectrum of a spiral galaxy atredshift z = 0.9. The galaxy's disk is observed to...
- Q Describe how bremsstrahlung and characteristic x-rays arecreated. Why are there no characteristic x-rays created under 70kVp? Be thorough in your answer and cover each step in the process(2 points).
- Q You throw a ball toward a wall with a speed of 25.0 m/s and alaunch angle of 40° relative to the ground. The wall is 22.0 m fromthe point where...
- Q A m = 4.0 mg insect has acquired a charge of q = -5.5 nC byflying close to a developing thunderhead. The insect
- Q Respond to the following:In your own words, describe reflections at planemirrors.In your own words, describe reflections at concave and convexmirrors.In your own words, refraction at thin lenses.
- Q An elevator with mass 500 Kg starts from rest and moves upward20.0 m in 5.00 s. What is the average rate with which the forcefrom the cable is doing work...
- Q 1.Two balls of mass 5 kg each moving in opposite directions withequal speed say 10 m/s collide head on with each other. Predict theoutcome of the collision assuming it to...
- Q Two blocks of masses?1 = 700 ? and ?2 = 1100 ? are connected by acord of negligible mass and hung over a disk- shaped pulley, asshown in the figure....
- Q Water is moving with a speed of 11.3 m/s through a pipewith a cross-sectional area of 4.5 cm2. Thewater gradually descends 30.0 m as the pipe's crosssection increases by a...
- Q You are pulling a rope that is attached to a sled that yourcousin is riding on. The rope that you are pulling on is at anangle of 30 degrees above...
- Q Object 1 is held at rest at the top of a rough inclined plane oflength ? = 1.5 ? and angle ? = 25∘. When it is released, it moveswith...
- Q Rewrite the following vectors in terms of their magnitude andangle (counterclockwise from the +x direction).(a) A displacement vector with an x component of +9.1 mand a y component of -9.5...
- Q Two identical objects, A and B, are thermally and mechanicallyisolated from the rest of the world. Their initial temperatures areTA > TB. Each object has heat capacity C (the same...
- Q Water flows through a 3 inch diameter pipe at a velocity of 10ft/s. Find the a) volume flow rate in cfs(cubic feet per second)and gpm(gallons per minute) b) mass flow...
- Q a toy rocket is fired fired at rest vertically upwards andaccelerates at a constant rate. At the instant the engine cuts out,the rocket has risen to 52 m and acquired...
- Q A magnesium ion (Mg+) moves in the xy-planewith a speed of 2.80 ✕ 103 m/s. If a constant magneticfield is directed along the z-axis with a magnitude of2.75 ✕ 10−5...
- Q Anthony carelessly rolls his toy car off a 78.0-cm-high table.The car strikes the floor at a horizontal distance of 98.0 cm fromthe edge of the table.(a) What was the velocity...
- Q In this week's lecture #3, Walter Lewin lit a fluorescent bulbby holding it near a Van de Graaff generator, charged to 300,000 V.Suppose that the spherical conductor of the Van...
- Q I am supposed to answer these conceptual questions with this labsimulator, but I can never get the simulator to workhttps://phet.colorado.edu/en/simulation/legacy/energy-skate-parkHelp please?Energy State Park Lab HandoutClick on the “Energy State Park...
- Q On neutron-capture induced fission, 235 92U typically splitsinto two new “fission product†92 nuclei with masses in the ratio1:1.4. These are born with the same proton to neutron ratio as...
- Q Inflation(a) Why is it puzzling that the observed CMB temperature isalmost exactly the same on opposite sides of the sky? How wouldthis result be explained in cosmology theories that do...
- Q Write the fundamental postulates of magnetostatic in free spacein differential form.By making use of the expressions you have written,a)Write the basic propositions of magnetostatic in integral formby showing step by...
- Q Let: q1 = +A μC q2 = +B μC, at the origin, B meters to the right of the origin , A meters aboveq2, A meters above the originq3 =...
- Q 2. Temperature and IlluminationAlone in your dim, unheated room, you light a single candlerather than curse the darkness. Depressed with the situation, youwalk directly away from the candle, sighing. The...
- Q For the TE10 and TE11 modes of a rectangular waveguide, deriveexpressions for the surface current density and the surface chargedensity.
- Q A father (weight W = 858 N) and his daughter (weight W = 372 N)are spending the day at the lake. They are each sitting on a beachball that is...
- Q A hot-air balloon stays aloft because hot air at atmosphericpressure is less dense than cool air at the same pressure. Thevolume of a balloon is V = 1000.0 m3,and the...
- Q Ahydrogen atom is in the n=4, ml=1 state. What are the possiblevalues of its total angular momentum? Express your answersnumerically as a multiple of h to three sig figs in...
- Q An amusement park ride consists of a cylindrical chamber ofradius R that can rotate. The riders stand along the wall and thechamber begins to rotate. Once the chamber is rotating...
- Q A uniform solid ball of m=4.0 kg and radius r rolls smoothlydown a ramp. The ball starts from rest. The ball descends avertical height of 6.0 m to reach the...
- Q Suppose that an asteroid traveling straight toward the center ofthe earth were to collide with our planet at the equator and buryitself just below the surface. What would have to...
- Q A large cubic thermal reactor, moderated and reflected by aninfinite reflector of water, is fueled with235U at a concentration of (10)^-4 g/cm3.(a) Calculate the critical dimensions of the core.(b) Compute...
- Q What are the challenges for laser therapy of dental caries?Estimate the absorption coefficient and ablation threshold ofenamel and dentin for the 1.057-µm radiation of the Nd:YLF laser.What would be the...
- Q In preparation for this problem, review Conceptual Example 7. Aspace traveler whose mass is 101 kg leaves earth. What are his (a)weight and (b) mass on earth and (c) weight...
- Q 2. Using the Michelson-Morley experiment as an example, explainwhy classical mechanics was unable to explain naturalphenomena.3. Using at least one of Einstein's \"thought-experiments\",explain how special relativity addresses how it is...
- Q Include written explanation and picture diagram.Communication satellites are often placed in geosynchronousorbits, which means that the satellite always appears in the samelocation relative to a receiver on the ground. This...
- Q A uniform plastic block floats in water with 40.0 % of itsvolume above the surface of the water. The block is placed in asecond liquid and floats with 20.0 %...
- Q In a fixed source/detector spectro-fluorometer, what can be doneto increase the sensitivity of the optical emission signal?
- Q Anapple drops from the tree and falls freely. The apple is originallyat rest a height H0 above the ground. The ground is covered with athick lawn, which is made of...
- Q A 0.454-kg block is attached to a horizontal spring that is atits equilibrium length, and whose force constant is 25.0 N/m. Theblock rests on a frictionless surface. A 5.80×10−2-kg wad...
- Q You are give a system about which two things are known: therelation between pressure,volume and temperature, and the heat capacity at constant volume(α is a constant) PV^3=αT; CV =A(V)TPlease(a) Find...
- Q Consider a case in which we have an Einstein solid that isneither at high or low temperature. In this case, we cannot useeither the N>>q or q>>N approximation. In this...
- Q Choices: True or False.If velocity is zero then acceleration must be zero too.If speed is constant then acceleration is zero.If velocity is constant then speed must be constant too.If speed...
- Q A spring with force constant k = 175 N/m is attached to theground. On top of the spring a 1.30 kg metal pan is attached. Thecombination could be used as...
- Q A small block with mass 0.0550 kg slides in a vertical circle ofradius 0.0740 m on the inside of a circular track. There is nofriction between the track and the...
- Q Explain why a fast neutron (1-10MeV) has a much higher relativebiological effectiveness (RBE) than a positron that results from abeta decay.
- Q Related to AstrophysicsExplain what is the Gamow peak
- Q 4) A nucleus of radioactive radium (226Ra), initially at rest,decays into a radon nucleus (222Rn) and an alpha-particle (a 4Henucleus). If the kinetic energy of the alpha-particle is 6.72 ×...
- Q 1. The U.S. Navy has long proposed the construction of extremelylow-frequency (ELF waves) communications systems; such waves couldpenetrate the oceans to reach distant submarines.Calculate the length of a quarter-wavelength antenna...
- Q WILL RATE YOU!!!Suppose you wanted to hang a frame imaged on the wall. Theobject will be hanging by two strings. Both of the strings attachedare at the top of the...
- Q Which property affects the strength of a rope?
- Q Calculate the energy of the lowest allowed energy level (theground state) according to Bohr's Model of the Hydrogen Atom. Giveyour answer in units of eV with two decimals.
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