Physics question and answers for August 13, 2023
- Q A flaggpole of mass 5km and length 3.0 m is hinged at a wall andsupported by a horizontal position by a cable affected to theflagpole at 2.0 M from the...
- Q Monochromatic coherent light with a wavelength of 632.8nm isincident on a double slit system with a slit separation of 0.15mm.What is the separation between the third bright spot from thecenter...
- Q (2a) A 4750.0 kg open train car is rolling on frictionless railsat 24.3 m/s when it starts pouring rain. A few minutes later, thecar's speed is 18.0 m/s. What mass...
- Q Explain what is interference, refraction and reflection inwaves.
- Q Of the fundamental forces, the text claims that “gravitydominates on very large scales.†However, both the gravitationalforce and the electric force decrease in proportion to the inversesquared distance. Explain why...
- Q Intro to Astronomy:Please CONCISELY answer these questions, thankyou!1.) Suppose the amount of mass in a black hole doubles,does the event horizon change? If so, does it grow, shrink, or staythe...
- Q Show how Plato proves the tripartition of the soul in Republic IV.What is the homunculus fallacy and is Plato guilty of it?
- Q . (a) Draw the basic setup for quantum key distribution.(b) Explain the “intercept-resend†attack that Eve can attempt(draw a simple figure).(c) Explain how this attack is thwarted by the quantum...
- Q 1.WhatarethedifferencesbetweenterrestrialandJovianplanetsintermsof:size, mass, orbits, and density/composition?2.WhyistherelotsofhydrogenandheliumintheatmospheresoftheJovianplanets, but not much in Earth’s atmosphere?3.Whataretheasteroidbelt,theKuiperbelt,andtheOortcloud?Whereare theyfound? How are the objects found in these three regions similar toor different from each other?4)Describethreepropertiesofthesolarsystemthatarethoughttobearesultof how the solar...
- Q (part 1 of 2)An electric car is designed to run on a bank of batteries with atotal potential difference of 29 V and a total energy storage of2.2×107 J. If...
- Q Show that if qd≫1 the probability for tunneling through apotential barrier of width d is proportional to e^(-2qd). Plot thisfunction and explain the implications.
- Q You have set up an experiment where two Stern-Gerlach analyzerssequentially measure spin along the z-axis. The first analyzerallows particles with spin up along z to pass. The second analyzerallows particles...
- Q 7. The University Skydiving Club has asked you to plan a stuntfor an air show. In this stunt, two skydivers will step out ofopposite sides of a stationary hotair balloon...
- Q While vacationing in the mountains you do some hiking. In themorning, your displacement is S⃗ morning= (2200 m , east)+ (4000 m north) + (200 m , vertical). After lunch,...
- Q What kind of travel is theorized to be a feature of worm holes(which according to mathmatics may exist, but have not beenobserved)?
- Q A 65kg skater travelling northward at 3.8m/s accidentallycollides with a 75kg skater travelling west at 2.4m/s. They hold onto each other while attempting to regain balance and continuemoving in that...
- Q The drive propeller of a ship starts from rest and acceleratesat 2.99 x 10-3 rad/s2 for 2.86 x 103 s. For the next 1.90 x 103 sthe propeller rotates at...
- Q Electric Field at a PointA -70nC charge is distributed uniformly along the x-axis from x= -0.8m to x = 2.6m. Consider a point at y = 1.5m on they-axis.a) What...
- Q How wide would the slits in Young’s two-slit experiment have tobecome in order for us to endup in the double slit diffraction situation? Clearly explain yourrationale in a maximum ofthree...
- Q Two thin slits separated by 0.0880 mm are illuminated by lightfrom a He-Ne laser (? = 633 nm), producing interferencefringes on a distant screen. Find the angle between the centers...
- Q (1)Sphere A is attached to the ceiling of an elevator by astring. A second sphere is attached to the first one by a secondstring. Both strings are of negligible mass....
- Q The table below contains distance and recessional velocity datafor ten galaxies.GalaxyDistance (Mpc)Observed Velocity (km/s)142.02546.0292.35964.9392.75490.1492.96652.7593.15115.36150.09800.07320.020260.08450.028150.09553.034889.010642.040536.0a) Plot the ‘Hubble Diagram’ for these galaxies. This is simplya plot of the observed velocity on...
- Q One of the most seemingly obvious things in all of ourexperiences is that the Earth is still and the Sun moves across thesky. And yet, we are told by science,...
- Q assuming that linear heat rate, fuel outsidetemperature and outside diameter for a solid fuel pellet and anannular fuel pellet are the same, how does the maximum temperaturecompare between the two...
- Q A spelunker is surveying a cave. She follows a passage 120mstraight west, then 270m in a direction 45â east of south, and then280 m at 30â east of north. After...
- Q A trooper is moving due south along the freeway at a speed of 33m/s. At time t = 0, a red car passes the trooper. The red car moveswith constant...
- Q Choose one of the following topics and write at least twosubstantial paragraphs that briefly explain both the topic itselfand how the topic relates to our study of light.The Double-slit experimentThe...
- Q An electron is moving in the field of a helium nucleus (Q =+2e).1,) What is the change in the electrons potential energy when itmoves from a circular orbit of radius...
- Q A filament conductor conducts current I in the −az direction andextends along the entire positive z axis. At origin, it isconnected to a conductive blade that forms the xy plane....
- Q RefractionSet up the ray box so the light is it directed at the prism at anangle of 50 degreesFind the value of the prism index of refraction using Snell'slawFind the...
- Q A small metal ball with a mass of m = 97.6 g is attached to astring of length l = 1.43 m. It is held at an angle of θ...
- Q soccer fields vary in size. suppose your favorite soccer field is120 m long and 65 m wide. A)what is its lenght in feet? B) what isits width in feet? C)...
- Q A container is filled to the brim with 1.5 L of mercury at20
- Q Consider a thin spherical shell located between r =0.49a0 and 0.51a0. For the n = 2, l = 1 stateof hydrogen, find the probability for the electron to be found...
- Q A spacecraft arrives at Mars’ sphere of influence with aheliocentric velocity of 22 km/s and a heliocentric ï¬ght-path angleof 10 deg. When the spacecraft reaches the periapsis of itsMars-centric arrival...
- Q 520/5000State the hypotheses of the causes of why: of each of thefollowing alternatives.A) automobile (without gasoline and without brake) slows down andstops;b) a book that slides on the table slows...
- Q Given: LST 81.1 deg W, 29.2 deg N, Ω = 150◦,i = 30◦. Find: Timein hours until the next launch window opens and launch azimuthβ.
- Q (a) What is the escape speed on a sphericalasteroid whose radius is 376 km and whose gravitationalacceleration at the surface is 0.683 m/s2?(b) How far from the surface will a...
- Q An 60 kg plank, 15 m long, hassupports at locations X1=4 m and X2=12m along the plank. Two additional forces F3=20N and F4=25 N act at thepoints X3=2 m and...
- Q A parallel-plate capacitor is constructed of two horizontal17.2-cm-diameter circular plates. A 1.1 g plastic bead with acharge of -8.0 nC is suspended between the two plates by the forceof the...
- Q n the Group Work, we examine standing waves on a string. Inorder to calculate the velocity of the wave, what two properties dowe need to know?The INERTIAL and ELASTIC properties...
- Q show the velocity and direction while proving that s(x,t) =Aexp[-(4x+6t)^2] is a wave equation
- Q A uniform hoop of mass M and radius R rolls down an inclinewithout slipping, starting from rest. The angle of inclination ofthe incline is θ.a. After moving a distance L...
- Q Using a coil of wire and an oscilloscope, explain how you candetect the presence of the Earth's magnetic field.Using a coil of wire and an oscilloscope, explain how you couldshow...
- Q 2. For a system of non-interacting, one-dimensional,distinguishable classical particles in a harmonic oscillatorpotential, V = kx2 in contact with a particlereservoir with chemical potential µ and a thermalreservoir at temperature...
- Q Alaser had a power output of 2mW and a beam diameter of 2mm. (A)what is the amplitude of the electric field in the electromagneticwaves emitted by this device? Find (b)...
- Q A 3.4 μC charge is placed at the origin of coordinates, and a-2.6 μC charge is placed to the x axis at 5.0 cm . 1)Find thelocation of the place(s)...
- Q - estimate the energy (in joule) produced from radioactivityover the Earth's lifetime.- Estimate the energy density (in joule/kg) of nuclear fissionfuels.- Estimate mass (in kg) of radioactive material is need...
- Q Consider the 1D wave equation d^2u/dt^2 = c^2( d^2u/dx^2) withthe following boundary conditions: u(0, t) = ux (L, t) = 0 . (a)Use separation of variables technique to calculate the...
- Q A 2.25×104 N elevator is to be accelerated upward byconnecting it to a counterweight using a light (but strong!) cablepassing over a solid uniform disk-shaped pulley. There is noappreciable friction...
- Q 1) What are a Vande Graaf generator and a Tesla Coil? Why aren’tpeople hurt when they come in contact with such high voltage?2) What is the difference between AC and...
- Q Four identical charges (+2.0 ?C each) are brought from infinityand fixed to a straight line. The charges are located 0.40 m apart.Calculate the amount of work done in assembling the...
- Q A circuit is constructed with an AC generator, a resistor,capacitor and inductor as shown. The generator voltage varies intime as ε =Va - Vb = εmsinωt,where εm = 120 V...
- Q What starts a dislocation and how does this advance in a crystalstructure?
- Q A ball rolls down along an incline without slipping. A block slidesdown from the same incline without friction. Assuming the twoobjects start from the same position, which of the followingstatement...
- Q Three point charges are arranged as follows: Charge Q1 = + 5.00nC is located at the origin. Charge Q2 = -3.00 nC is located at x =+4.00 cm, y =...
- Q This question is about throwing a ball vertically upwards andcatching the ball.Compare the part of the graph of mechanical energy vs. timebefore the ball is in free-fall to the part...
- Q Think of a Newtonian cradle made of only two marbles. These twomarbles of masses m1 and m2 are each suspended by identicalstrings. The strings are initially both vertical so the...
- Q Write about the following:Texture (preferred orientation)of cubic material, grain size,effect of temperature on x rayintensity, structure factor. ?
- Q 1.The intensity of a sound decreases by a factor of 4. As aresult, the sound intensity level decreases by ______.4 dB16 dB6 dB8 dB2.The human threshold of pain is about...
- Q Needs to document an amusement park ride. For example: Roundrotating cylinder where the floor drops out. The information cancome from any online website. Needs to know the radius and speed...
- Q Aliens are observing a park in new york. They notice amerry-go-round has a radius of 3.12m and a moment of inertia of3100kgm^2 at the vertical axis through the center. The...
- Q Which pair of quantities represent scalarquantities?(1) displacement and velocity(2) displacement and time(3) energy and velocity(4) energy and time
- Q A bullet of mass m = 8.00 g is fired into a block ofmass M = 210 g that is initially at rest at the edge of atable of height...
- Q You are on roller blades, holding a rope attached to a truck.Starting from rest, the truck pulls you. After traveling for 7.33s, you are moving at 10.0 m/s. If the...
- Q Radiation from the Sun reaching Earth (just outside theatmosphere) has an intensity of 1.35 kW/m2.(a) Assuming that Earth (and its atmosphere)behaves like a flat disk perpendicular to the Sun's rays...
- Q 4)Earth exerts a gravitational force of more than 1,000,000 N on aninternational space station what force does the ISS expert onearth?20) you hace no doubt seen pictures or the astronauts...
- Q How much horsepower is needed, in a vehicle described below, totravel a distance of 1 statute mile in 35 seconds, from a standingstart, with the following information:Air density @ sea...
- Q A horizontal beam of length 4.07 m and weight 150 N is attachedto a vertical wall at a right angle. There is also a support wireof length 5.01 m which...
- Q Consider a single pane glass window that has an area of 8ft^2and is 3/16†thick. The outside temperature is -10oC and the insidetemperature is 21oC. [9]a.How much heat flows through...
- Q What are10 examples of energy transformations, in the real world.For each, define the system and describe the energytransformation.
- Q An object starts at the position 4.8x̂ + -9.7ŷ m, with aninitial velocity of 1.5x̂ + -4.4ŷ m/s. It has an acceleration of-0.152x̂ + 0.686ŷ m/s2. After 2.31 s, what...
- Q Using Hamilton’s equations, show that for any solution Ï(t) ofLiouville’s equation that asymptotically approaches the equilibriumsolution Ï(eq), there is a time-reversed solution that divergesfrom it. What does this mean?
- Q A spherical mylar balloon filled with Hydrogengas, with density 0.0899 kg/m3 andhaving radius 7 meters is immersed in a gas havingdensity X1=1.205 for the first 10km and X2=2.489 for the...
- Q The parameters of the apparatus that are important to itsfunction are: Solenoid winding: # turns N=1000; winding length Ls =10 cm; radius R=2.5 cm; wire radius r=0.05 mm; wire resistivity...
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