Physics question and answers for September 20, 2023
- Q In an apartment building, water is traveling up inside a pipethat has a constant cross-sectional area.(A.) Which of the following statements aboutthis situation are true? Choose the two correct statements.As...
- Q (A.) A \"healthy\" systolic (during heartcontraction, the high number in 120/80) blood pressure is typically120 mmHg. What is this in Pascals? (Take the density of mercury tobe 14 g/ml and...
- Q A 62.0-kg boy and his 36.0-kg sister, both wearing rollerblades, face each other at rest. The girl pushes the boy hard,sending him backward with a velocity 3.10 m/s toward the...
- Q a) A block of Aluminum has a density of 2700 kg/m^3 and a massof 63 grams. The block is tied to one end of a string and the otherend of...
- Q In the absence of air resistance, a projectile that lands at theelevation from which it was launched achieves maximum range whenlaunched at a 45∘ angle. Suppose a projectile of mass...
- Q A rope of negligible mass hangs vertically on each side of apulley. The pulley, which has mass 1.00 kg and radius 20 cm, can bemodeled as a thin uniform cylinder....
- Q A small solid sphere of mass M0, of radiusR0, and of uniform density Ï0 is placed in alarge bowl containing water. It floats and the level of the waterin the...
- Q Use chemical potentials to explain the driving force for thespontaneous mixing of gases or liquids
- Q A flywheel with a radius of 0.390 m starts from rest andaccelerates with a constant angular acceleration of 0.670 rad/s2.Compute the magnitude of the tangential acceleration, the radialacceleration, and the...
- Q Starting from the one-dimensional motion equation x=Xo + vtprove that v^2 = Vo^2 + 2a(X-Xo)If you could eplain as well why/ how each step in the problemproves the equation, this...
- Q Show that setting the 4-divergence of current four vector equalto zero gives the equation of continuity.
- Q A 960-kg satellite orbits the Earth at a constant altitude of95-km.(a) How much energy must be added to the system to move thesatellite into a circular orbit with altitude 193...
- Q A marble rolls down an incline, and when it’s halfway down it’sgoing at 1.12 m/s. Find (a) its starting height and (b) its speedat the bottom.
- Q List the six stages, in order, a massive star undergoes and itslifespan starting with NEBUL and ending with neutron star
- Q A bucket of water of mass 16.0 kg is suspended by a rope wrappedaround a windlass, that is a solid cylinder with diameter 0.320 mwith mass 13.0 kg . The...
- Q What were two reasons as to why Rutherford selectedalpha-particles for his experiment?
- Q From Millikan’s oil drop experiment, what was he value of thevoltage that allowed the  drops to obtain terminalvelocity?
- Q Two students are discussing how the period of a toy pig flyingin a circle depends onthe length of the string.Student A says: The period depends on the length of thestring.Student...
- Q A 80.0 cm3 box contains helium at a pressure of 2.50 atm and atemperature of 110 ∘C. It is placed in thermal contact with a 210cm3 box containing argon at...
- Q 1.) Identical objects are located at the same distance from twospherical mirrors, A and B. The magnifications produced by themirrors are mA = 3.6 and mB= 2.1. Find the ratio...
- Q Which of the following statements explains why you cannot cooldown your house by holding the refrigerator open?Select one:a. Cold air in the cold box will flow into the kitchen but...
- Q Howdoes friction impact free fall when skydiving?
- Q Hi, could you please provide a detailed explanation.. Thankyou!Q1(i) Explain how you can use Newton’s version of Kepler’s thirdlaw to measure mass of the Sun.(ii) Suppose a satellite is in...
- Q A 6.35 mm high firefly sits on the axis of, and 14.1 cm in frontof, the thin lens A, whose focal length is 5.03 cm. Behind lens Athere is another...
- Q Two 0.60 kg basketballs, each with a radius of 10 cm, are justtouching. Ignore any other gravitational interactions.(a) How much energy is required to change the separation betweenthe centers of...
- Q 2)A 0.520-kg object attached to a spring with a force constantof 8.00 N/m vibrates in simple harmonic motion with an amplitude of10.2 cm. (Assume the position of the object is...
- Q Chapter 10 [ Essential University of Physics( 3rded.)]Given the following Rdisk= 2.50 cm, Raxle=0.250 cm, Mdisk= 25.0 g, Maxle= 0.750g,  Laxle= 1.00 cm, and state any assumptionused. a) Determine the rotational...
- Q The fist (thin) string in a guitar should be two octaves higherthan the sixth (thick) string, that is, its fundamental frequencyis four times higher. If both strings are equal in...
- Q Physical Chemistry ICalculate the values q, w, deltaU, and deltaH for the reversibleadiabatic expansion of 1 mole of an ideal monatomic gas from5.00m3 to 8.00m3. The temperature of the gasis...
- Q [Q5-Home] (This question has 4 parts) You have a RC circuitconnected to AC sine wave of 10 Volts peak. Your capacitor is 100μF and your resistor is 10 Ω in...
- Q Mass 1 is moving at 6 m/s in the +x direction and it collides ina perfectly elastically with mass 2 of 2 kg moving at 15 in the -xdirection. They...
- Q In a physics lab, a cube slides down a friction-less incline asshown the figure below and elastically strikes another cube at thebottom that is only one-half its mass. If the...
- Q Bifocal glasses are used to correct both nearsightedness andfarsightedness at the same time. (Figure 1)Part A: If the near points in the right and left eyes are 38.0cm and 46.0...
- Q In an old-fashioned amusement park ride, passengers stand insidea 4.5-m-diameter hollow steel cylinder with their backs against thewall. The cylinder begins to rotate about a vertical axis. Then thefloor on...
- Q A long, straight wire carrying a current I1 is placedon a horizontal table in front of you and the direction of thecurrent points +x axis. The magnetic field produced by...
- Q Assume a liter of milk has an activity of 1960 pCi due to4019K, with RBE = 1. If a person drinks 2glasses (0.440 L) per day, estimate the total dose...
- Q A parallel-plate capacitor with circular plates of radius aseparated by a distance d is being charged though a resistor R andbattery with emf E.1 (a) (5pts.) Make a diagram showing...
- Q What phase difference between two otherwise identical travelingwaves, moving in the same direction along a stretched string, willresult in the combined wave having an amplitude 1.3 times that ofthe common...
- Q A set of jumper cables used to start a car from another car'sbattery is connected to the terminals of bothbatteries.  If 20 A of current exists in the cables during the...
- Q A helicopter propeller blade starts from rest and experiences aconstant angular acceleration of 14.0 rad/s2. Find the speed of apoint on the blade 5.60 m from the axis of rotation...
- Q A uniform ladder 5.30Â Â m long rests against africtionless, vertical wall with its lower end 3.10Â Â mfrom the wall. The ladder weighs 157Â Â N . The coefficientof static friction between the foot of...
- Q If it should happen that a high voltage electric line shoulddrop from the pole and make contact with a car, the person in thecar should jump out of the car...
- Q The hollow cylinder from the last problem is attached to aspring with spring constant k = -1.6 and extended to an initialdisplacement of 9 cmA) What is the period if...
- Q We can roughly model a gymnastic tumbler as a uniform solidcylinder of mass 65.0 kg and diameter 1.00 m.Part A If this tumbler rolls forward at 0.300 rev/s , how...
- Q 7.3 Steam Generator Tube Break(c) What particular precautions would need to be followed whileshutting down such a unit?
- Q Steam at 100°C is added to ice at 0°C.(a) Find the amount of ice melted and the final temperature whenthe mass of steam is 11 g and the mass of...
- Q (a) A 374 kg satellite orbits the Earth at a height of 3197 kmabove the Earth's surface. Assume the Earth has a mass of 5.98 x1024 kg and a radius...
- Q The angular momentum of a flywheel having a rotational inertiaof 0.407 kg·m2 about its central axis decreases from5.40 to 0.970 kg·m2/s in 4.60 s. (a)What is the magnitude of the...
- Q A damped oscillator is formed by attaching a mass with m = 1.5kg to one end of a spring with spring constant k = 8 N/m. The otherend of the...
- Q •A ball is thrown upward from an initial height of  4.9 m with an initial speed of 9.8 m/s•How high is the ball 2.0 s later?•What is the velocity of the...
- Q Bohr’s Model can be used to find the wavelengths of the photonsin the absorption or emission spectrum of hydrogen atom.Using that model, find the wavelengths of the 5→2, 4→2, 3→2...
- Q The propeller of a plane has a rotational inertia of 890kg*m2. Each blade has a length of 3.3 m. The propellorstarts from rest and reaches a final angular speed of...
- Q how do you calculate the TOTAL energy that isreleased during thermal fission, of the reaction235U+1n--->140Ba+98Kr+2n. Emphasis on total, meaning prompt anddelayed neutron energy should be taken into account.
- Q Two cars are on a level air track. They have the same mass aseach other. The red car is given a push so that it moves toward theblue car with...
- Q A 63.0-kg survivor of a cruise line disaster rests atop a blockof Styrofoam insulation, using it as a raft. The Styrofoam hasdimensions 2.00 m ✕ 2.00 m ✕ 0.0895 m....
- Q An electron in a TV camera tube is moving at 6.20×106 m/s in amagnetic field of strength 75 mT. Without knowing the direction ofthe field, what can you say about...
- Q The water flow rate for a particular sprinkler is 19 gpm. Thewater must be projected at least 24 feet in radius. The sprinkleris mounted 11 feet above the ground and...
- Q At any one time, the dominant naturally occurring radioisotopesin the human body are 14.0 mg of Potassium-40 (half-life 1.25 X 109years) and 16.5 ng of Carbon-14 (half-life  5730 years).Calculate the...
- Q 1a. Give 6 examples where Energy is Conserved in an event.1b. Give 6 examples where Energy is NOT Conserved in anevent.1c. Give 2 examples of an event where Momentum is...
- Q given that a large population which has been living on anisolated is in hardy weinberg equilibrium; what can be said aboutthe relative fitness of the dominant individuals relative to therecessive...
- Q an Astronomy question, please answer it comprehensively. ThankyouList (and explain) two reasons astronomers suspect that DarkMatter exists.
- Q Question 1A 242 g box slides up a 16.1° ramp at a speed of 4.05 m/s. Usingconservation of energy and assuming the ramp is frictionless, howfar along the ramp does...
- Q The sound intensity is 0.0072 W/m2 at a distance of 20 m from anisotropic point source of sound. (a) What is the power of thesource? (b) What is the sound...
- Q A photon of wavelength 6.63 pm scatters at an angle of 167 ∘from an initially stationary, unbound electron. What is the deBroglie wavelength of the electron after the photon has...
- Q An ideal monatomic gas originally at a pressure of3x105 Pascals and 75 moles and volume 1.2 m3& Ti is expanded isothermally to a volume of 3.5m3 at which point it...
- Q A cockroach of mass m lies on the rim of a uniform diskof mass 4.00 m that can rotate freely about its centerlike a merry-go-round. Initially the cockroach and disk...
- Q How to combine the point-particle and real system/extendedsystem analyses of a system to compute changes in the system’sinternal energy?
- Q asthe earths orientation to the sun changes between winter andsummer, is the total amount of energy striking the earthchanging?
- Q A uniform disk with mass 8.5 kg and radius 8 m is pivoted at itscenter about a horizontal, frictionless axle that is stationary.The disk is initially at rest, and then...
- Q Consider the following. (a) Find the angle θ locating the firstminimum in the Fraunhofer diffraction pattern of a single slit ofwidth 0.186 mm, using light of wavelength 424 nm. (b)...
- Q Problem 3The purpose of this problem is to find the Net Magnetic Fieldforce of the two electric currents at point P.There are two parallel wires carrying currents I1 =15 A...
- Q Three identical stars of mass M form an equilateral trianglethat rotates around the triangle’s center as the stars move in acommon circle about that center. The triangle has edge length...
- Q 10. Water at a pressure of 3.60 atm at street level flows intoan office building at a speed of 0.60 m/s through a pipe 4.40 cm indiameter. The pipes taper...
- Q A 0.478 kg puck, initially at rest on a horizontal, frictionlesssurface, is struck by a 0.129 kg puck moving initially along the xaxis with a speed of 2.19 m/s. After...
- Q The mass of a hot-air balloon and its cargo (not including theair inside) is 220 kg. The air outside is at 10.0°C and 101 kPa.The volume of the balloon is...
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