Physics question and answers for September 23, 2023
- Q baseball pitcher executes a pitch in 0.32 sec. (assume that hismotion of the pitching arm is a circular, also assume thatv1 = 0). If his pitching arm is 90 cm...
- Q A generator at a utility company produces 100 A of current at4.0 x 103 V. The voltage is stepped up to 2.4 x 105 V by atransformer before being sent...
- Q The Boeing 777 aircraft has a takeoff mass of 240000kg and atakeoff speed of 90m/s . Assume that's the speed of air across thewing's bottom. The total surface area of...
- Q A football quarterback is traveling straight backward at a speedof 5.1 m/s when he throws a pass to a receiver 15.5 m straightdownfield.(a) If the ball is thrown at an...
- Q A disc and solid sphere are both rolling without slipping sothat both have a kinetic energy of 294. What is the translationalkinetic energy of the disc ? What is the...
- Q A bowling ball of mass m and radius r has a coefficient ofstatic friction µ when in contact with an oiled wood surface. Modelthe ball as a solid uniform sphere....
- Q How do LaserTweezers work? What can you do with LaserTweezers?Discuss three examples for bio-applications of LaserTweezers.
- Q In a ballistics test, a 23.0gbullet traveling horizontally at1300m/sgoes through a 40.0cm-thick 450kgstationary target and emerges with a speed of900m/s. The target is free to slide on a smoothhorizontal surface....
- Q The parity operator P is defined byˆ Pψ (x) =ψ (−x)for any function ψ(x).(a) Prove that this parity operator P is Hermitian.(b) Find its eigenvalues, and also its eigenfunctions (in...
- Q Provide a description of our home galaxy, the Milky Way. Includein your description the location and stellar populations (newstars/ old stars) of the central bulge, disk, and halo. Alsoprovide details...
- Q A pendulum has a length 1 m and a mass 1 kg. Assume Earth freefall acceleration equal to 10 m/s^2. When the pendulum oscillates,the maximal deflection angle is +/- 1...
- Q USING CONSERVATION OF ENERGY AND WORK ENERGY PRINCIPLE:A block of mass m=1.8 kg on a table is pushed against a springthat has a force constant of k=250 N/m, compressing it...
- Q Two blocks are positioned on surfaces, each inclined at the sameangle of 52.5 degrees with respect to the horizontal. The blocksare connected by a rope which rests on a frictionless...
- Q A pendulum has a length 1 m and a mass 1 kg. Assume Earth freefall acceleration equal to 10 m/s^2. When the pendulum oscillates,the maximal deflection angle is +/- 1...
- Q A photovoltaic solar collector with an area of 2 m2 is trackingthe sun for 8 hours on a sunny day. Assume that, the solar flux onthe collector is constant through...
- Q A H2 molecule can be approximated by a simpleharmonic oscillator having a spring constant k = 1.1 ✕103 N/m.(a) How many different energy transitions are possible when theH2 molecule decays...
- Q Captain Kiddo is trapped into her car, a 1967 DeTomaso Mangusta,windows rolled up, which sinks deep down into the ocean.A) Will she have a better chance to escape by the...
- Q A large storage tank, open to the atmosphere at the top andfilled with water, develops a small hole in its side at a point11.6 m below the water level. Assume...
- Q I assume it is some kind of quantity. Google only made thingsmore confusing.I get that it has something to do with circuits.I also get what a discrete charge is. In...
- Q Jason takes off from rest across level water on his jet-poweredskis. The combined mass of Jason and his skis is 75 kg(the mass ofthe fuel is negligible). The skis have...
- Q In the figure, a T bar ski tow pulls a skier up a hill inclinedat 10 degrees above horizontal. The skier starts from rest and ispulled by a cable that...
- Q A charge of -1.0 µC is located at the origin, a second charge of1 µC is located at x = 0, y = 0.1 m, and a thirdcharge of 11...
- Q If you take a boat from earth and put it on a planet with twiceearth’s gravity, what wouldhappen if you tried to float it in water? Hint: Think about thebuoyancy...
- Q Two infinite planes of charge lie parallel to each other and tothe yz plane. One is at x = -2 m and has a surface charge densityof Ï = -3.2...
- Q What does the Schechter function describe? Describe thesignificance of each of the two fitting parameters. What does thede Vaucouleurs law describe? Describe the significance of each ofthe two fitting parameters.
- Q You pour 100 g of cold milk (T_m=5 degrees C) into your 500 ghot coffee (T_c=80 degrees C) and mix them together. Assume this isan isolated system in which no...
- Q An RLC series circuit has a 2.60 Ω resistor, a 200 µHinductor, and an 82.0 µF capacitor.(a) Find the circuit's impedance (in Ω) at 120 Hz.________Ω(b) Find the circuit's impedance...
- Q How much heat energy is required to cool 450 grams of water at20°C into ice at -20°C?
- Q Given a liter of water just at boiling, how much energy does ittake to boil it all?
- Q A large boat with 91.44 m in length and 42.672 m in width iscarrying 1,360,777.11 kg of coal along the river with a 2.7432mdraft (the height from waterline to bottom...
- Q One possible means of achieving space flight is to place aperfectly reflecting aluminized sheet into Earth
- Q A 40.0-cm diameter disk rotates with a constant angularacceleration of 3.00 rad/s2. It starts from rest at t = 0, and aline drawn from the center of the disk to...
- Q 1a. On planet #4, you fire a projectile from the ground at aninitial speed of 29.7 m/s at an angle of 44.7 degrees above thehorizontal. The projectile lands 36.1 m...
- Q A simple pendulum with mass m = 1.5 kg and length L = 2.49 mhangs from the ceiling. It is pulled back to an small angle of θ =9.5° from...
- Q Sketch a blackbody radiation spectrum for a hot object and acold object. What two things differ between the two spectra?Explain, using an illustration, what the spectrum looks like for anobject...
- Q Three 81.6 g masses are connected in a triangular shape bymassless rigid wires as shown in the first image (which is notdrawn to scale). The coordinates of each mass are...
- Q What are the core concepts and methods of Kinematics?What are the core concepts and methods of Dynamics?What are the core concepts and methods of Work-Energyrelationships?How all of the above are...
- Q 1. A 1400 kg car goes around a corner with a radius ofcurvature= 60m.a) if the coefficient of static friction between the tires andthe roads is 0.800 what is the...
- Q A 5.80 x 103 kg delivery truck moving with a velocity of 20 m/shits a 1.50 x103 kg parked car. As a result of the impact, the carwas set in...
- Q Two pucks are sliding across a frictionless surface. Puck A hasa mass of .330 kg and a velocity of 5.50 m/s in the x direction.puck be has a mss of...
- Q Two ice skaters, with masses of 50.0 kg and 65.0 kg , are at thecenter of a 30.0 m -diameter circular rink. The skaters push offagainst each other and glide...
- Q Find the heat capacity of a block of unknown material. You willimmerse the block, with its temperature known, into a knownquantity of water, which is at a very different temperature...
- Q How is Bernoulli’s Principle equivalent to the Work EnergyTheorem and the Conservation of Energy Principle?
- Q A sound source A and a reflecting surface B move directly towardeach other. Relative to the air, the speed of source A is 29.7 m/s,the speed of surface B is...
- Q Near Earth Objects (NEOs) is anything in space that comes tooclose to Earth (within 1.3 AU) and is sufficiently large. Describetwo challenges astronomers face in finding NEOs.Additionally, scientist distinguish between...
- Q What is kinetic energy and how does it relate to the Boltzmanndistribution?
- Q 1. (a) Find the charge stored on each capacitor in Figure 18.24(C1 = 30.0 µF, C2 = 4.50µF) when a 1.51 V battery is connected to the combination.C1___C?C2___C?0.300 µF capacitor___C?(b)...
- Q A hydraulic jack is designed to lift a car by exerting an outputforce 100 times as large as the input (see class notes). (a) Whatmust be the ratio of the...
- Q A 0.042 kg aluminum bullet traveling at 456 m/s strikes an armorplate and comes to a stop. If all its energy is converted to heatthat is absorbed by the bullet,...
- Q 1a. An unidentified flying object (UFO) is observed to travel atotal distance of 46000 m, starting and ending at rest, over aduration of 1.57 s. Assuming the UFO accelerated at...
- Q 2 Pascal’s PrincipleAn Olympic swimming pool is 50 m long, 25 m wide, and 2 mdeep.(a) Make a plot of pressure as a function of depth in the pool, for0...
- Q The electron gun in a television tube uses a uniform electricfield to accelerate electrons from rest to 4.7×107 m/sin a distance of 1.3 cm .What is the electric field strength?
- Q The Second Edition of the Oxford English Dictionary is currentlyavailable as a 20-volume print edition and costs $895. Imagine thatthe publishers would like to distribute a lower-cost version of thedictionary...
- Q A satellite is in an elliptical orbit around the earth. Thedistance from the satellite to the center of the earth ranges from7.2 Mm at perigee (where the speed is 8.0...
- Q ANSWER THE FOLLOWING QUESTION AND DRAW DIAGRAM FOR EACH PART OFQUESTIONQ1(A).Two point charges are located on the x axis. The first isa charge +Q at x = a. The second...
- Q A uniform cylinder of radius 14 cm and mass 27 kg is mounted soas to rotate freely about a horizontal axis that is parallel to and9.3 cm from the central...
- Q A 100 pF capacitor has circular plates of 10.0 cm radius thatare 5.0 mm apart and have air beteween them. The capacitor ischarged by connecting it to a 12.0 V...
- Q Two parallel conducting plates are oriented in an ? − ?coordinate system. The plates are separated by a distance ? = 0.05?, and the origin of the coordinate system is...
- Q A12 Volt battery is connected to three resistors. A 10 ohm resistoris attached in parallel to a 25 ohm and a 15 ohm resistor, both ofwhich are in series with...
- Q which of the following motions should be correctly analyzedusing the torque version of Newton's 2nd law? Circle all thatapply.a. a car slows to a stop as it approaches a traffic...
- Q 10) A solid disk with a c of 1/2, mass of 2 kg, and radius of1.4 meters lies on a horizontally (so the normal force and weightcan be ignored). A...
- Q If we dropped a car weighing 4451 lbs. from a C-130aircraft at 5,280 ft, how much horsepower would it take to drivepast it before it hits the ground if you’re...
- Q A hydrogen-rich gas stream contains 1.0 mole % carbon monoxide.It is desired to use a microporous ceramic membrane for separatingcarbon monoxide (CO) from hydrogen gas at a pressure of 1...
- Q In the “race†of conceptual problem 5 (and similar to what wedid in lab), the uniform cylinder, uniform sphere, and cylindricalhoop race down a 2 meter long ramp tilted 10o...
- Q A wheel turns through 2.1 revolutions while accelerating fromrest at 16 rpm/s.What is its final angular speed?How long does it take?
- Q Name and explain 3 ways in which momentum and kinetic energy arenot conserved when they should be
- Q The rearview mirror of a car is a convex mirror (R = -15 m).Consider the image formed by a car that is 10 m from themirror.A convex mirror means that...
- Q 3. (a) What is “photon bunching� Draw a simple diagram.(b) Explain which histories interfere and why assuming that thephotons are indistinguishable.(c) What is the final conclusion? What do the photons...
- Q A bullet is fired horizontally at a stationary 7.0 kg target.The target sits on a frictionless horizontalsurface and is connected to a spring on the backside of thetarget. The spring...
- Q An Insulated piston cylinder device contains 4 L of saturatedliquid water at a constant pressure of 150 K PA. water is stirredby a paddle wheel while a current of 9...
- Q 9) A flywheel initially rotating at 1200 rpm stops in 4.00 minwhen only friction acts. If an additional torque of 300 N-m isapplied, it stops in 1.00 min. (a) What...
- Q An electric field of intensity 3.45 kN/C isapplied along the x-axis. Calculate the electric fluxthrough a rectangular plane 0.350 m wide and 0.700 m long if thefollowing conditions are true.(a) The plane is...
- Q 1. (a) Explain the “one-time pad†method for sending secretmessages. In particular, explain the nature and the role of thesecret key.(b) Why is it impossible for anyone without the secret...
- Q During high-intensity exercise such as sprinting or lifting avery heavy weight, energy is provided to cells by the phosphogensystem (or ATP-PC system), which only works for a few seconds. Ifthe...
- Q Driven RC circuit in parallel. A capacitor C is connected inparallel to a resistor R and an AC source providing a voltage v(t)= V sin(ωt).(a) Make a phasor diagram at...
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