Physics question and answers for September 19, 2023
- Q 1. For what kinetic energy is the de Broglie wavelengthof an electron equal to its Compton wavelength? Express your answerin units of mc2 in doing the calculation, and then use...
- Q Make a list of all the possible sets of quantum numbers that anelectron in an atom can have if n = 4. How many different stateswith n = 4 are...
- Q You sign up for a bungee jump off a tall bridge. A thick ropewith a fixed length of 18.0 m is tied to the bridge, and a bungeecord with an...
- Q Describe the source of distortion and the means of correction interms of the wave model of light and wave optics. Be sure to usethe terms ray, wave, reflection, refraction and...
- Q differentiate between conduction convection and radiation as ameans of transportation of energy state the equation for each andexplain each symbol used
- Q How much energy is required to accelerate a spaceship with arest mass of 107 metric tons to a speed of 0.458c?Tries 0/20Every day our Earth receives 1.55×1022 J energy fromthe...
- Q A solenoid having an inductance of 9.13 μH is connected inseries with a 1.62 kΩ resistor. (a) If a 16.0 V battery isconnected across the pair, how long will it...
- Q While taking a shower, you notice that the shower head is madeup of 36 small round openings, each with a radius of 1.4 mm. Youalso determine that it takes 7.0...
- Q 1. Describe a scenario where two objects are electricallyattracted to one another, but one of the objects is neutral incharge2. What would happen if the force of gravity was stronger...
- Q A bat flying at 4.80 m/s is chasing an insect flying in the samedirection. The bat emits a 40.0-kHz chirp and receives back an echoat 40.4 kHz. (Take the speed...
- Q Problem 9: Suppose that a 115 kg football player running at 5.5m/s catches a 0.47 kg ball moving at a speed of 25.5 m/s with hisfeet off the ground, while...
- Q A sheet of glass (n=1.50) is coated with a 500 nm -thick layerof oil (n=1.42).A. For what visible wavelengths of light do the reflected wavesinterfere constructively? The range of wavelength...
- Q A rock is suspended by a light string. When the rock is in air,the tension in the string is 52.9 N . When the rock is totallyimmersed in water, the...
- Q Ohm’s Law in terms of the applied potential. But we canre-express the potential as the integral of the electric fieldalong some path. We can also re-express electrical resistance interms of...
- Q A series ac circuit consists of a voltage source of frequency f= 60 Hz and source voltage amplitude 345 volts, a resistor ofresistance R = 255 Ω, a capacitor of...
- Q A wagon is rolling forward on level ground. Friction isnegligible. The person sitting in the wagon is holding a rock. Thetotal mass of the wagon, rider, and rock is 98.9...
- Q A copper collar is to fit tightly about a steel shaft whosediameter is 7.0000 cm at 20° C. The inside diameter of the coppercollar at that temperature is 6.9760 cm....
- Q A vertical spring (ignore its mass), whose spring constant is825 N/m , is attached to a table and is compressed down by 0.160m.A)What upward speed can it give to a...
- Q A 123 turn circular coil of radius 2.27 cm is immersed in auniform magnetic field that is perpendicular to the plane of thecoil. Over an interval of 0.167 s ,...
- Q A 45.0-g object connected to a spring with a force constant of50.0 N/m oscillates with an amplitude of 7.00 cm on a frictionless,horizontal surface.(a) Find the total energy of the...
- Q A railroad car of mass 3.10 ✕ 10^4 kg moving at 3.50 m/scollides and couples with two coupled railroad cars, each of thesame mass as the single car and moving...
- Q The Photoelectric Effect Lab 10Prelab Questions : PredictionsIf the light shining on the metal becomes brighter, will thekinetic energy of the emitted electrons increase?If the light shining on the metal...
- Q (1) Parasaurolophus was a dinosaur whose distinguishing featurewas a hollow crest on the head. The 1.2m long hollow tube in thecrest had connections to the nose and throat, leading someinvestigators...
- Q 1.) A hiker, who weighs 860 N, is strolling through the woodsand crosses a small horizontal bridge. The bridge is uniform,weighs 3220 N, and rests on two concrete supports, one...
- Q Describe an experiment to determine if a resistor models ohmslaw.(i) Draw a diagram of the experimental setup. Label all themeasured quantities and draw or state what equipment is used.(ii) Describe...
- Q What the physics behind a Ballista?
- Q Steve Young stands on the 20-yard line, poised to throw long. Hethrows the ball at initial velocity v0 equal to 15.4 m/s andreleases it at an angle θ equal to...
- Q A fugitive tries to hop on a freight train traveling at aconstant speed of 5.0 m/s. Just as an empty box car passes him, thefugitive starts from rest and accelerates...
- Q You are standing at x=8.0km and your assistant is standing atx=5.0km. Lightning bolt 1 strikes at x=0km and lightning bolt 2strikes at x=14.0km. You see the flash from bolt 2...
- Q (1)Write a few lines about work, (at least 60 words) examplesand units of work and how I recognize work.(2) Also write a few lines (at least another 50 words) aboutKinetic...
- Q A block of mass m1 = 1.31 kg and a block of massm2 = 11.4 kg are connected by a massless string over apulley in the shape of a solid...
- Q One \"extreme\" example of gravity is a black hole. What wouldhappen to the Earth's orbit if the Sun was suddenly replaced by ablack hole of the same mass? Why? (Please...
- Q why would someone be curious about Nuclear Magnetic Resonance(NMR) and Magnetic Resonance Imaging (MRI)? and how is it relatedto modern physics? Â Â
- Q A box of mass M sits on the floor of an elevator at rest.Gravity (which has a strength set by the local acceleration due togravity g) pulls the box and...
- Q Starting in Albany, you travel a distance 319 miles in adirection 22.3 degrees north of west. Then, from this new position,you travel another distance 360 miles in a direction 11.0...
- Q An unstable nucleus of mass 1.7 ✕ 10−26 kg, initially at rest atthe origin of a coordinate system, disintegrates into threeparticles. One particle, having a mass of m1 = 1.0...
- Q Suppose that an electron and a proton are placed at a distanceof 1.2nm away from each other (about 10 times the radius of ahydrogen atom).(a) How much is the Coulomb...
- Q A billiard ball rolling across a table at 1.45 m/s makes ahead-on elastic collision with an identical ball. Find the speed ofeach ball after the collision when each of the...
- Q Consider the steady, incompressibleblood flow through the following vascular network: 100 µm diameterwhich is 80 mm in length to the first branching point, which can beestimated as a standard tee...
- Q Two objects of masses m and 8m are moving toward each otheralong the x-axis with the same initial speedv0 = 525 m/s.The object with mass m is traveling to the...
- Q why are systems with fixed restriction meteringdevices critical to charge
- Q Three children are riding on the edge of a merry‑go‑round thathas a mass of 105 kg and a radius of 1.60 m . The merry‑go‑round isspinning at 22.0 rpm. The...
- Q Respond to thefollowing:In your ownwords, explain the Bohr model, line spectra, and energy levels, andits applications.
- Q The pilot of an airplane executes a loop-the-loop maneuver in avertical circle. The speed of the airplane is 250 mi/h, at the topof the loop and 450 mi/h at the...
- Q A light source emits a photon during a time interval of 2.8910-8 s. (a) Find the minimum uncertainty in the photon's energy.(b) Find the minimum frequency bandwidth of the light
- Q An airplane’s propeller blades slow down to 2rev/s in 5s, making200rev in the process. Assuming a constant acceleration, what wasthe blades’ angular speed before starting to slow down? Answer:4680 rpm
- Q Problem 6. In space, thermal equilibrium is achievedwhen incoming radiation (e.g. from the Sun) is balanced againstoutgoing radiation (e.g. from the surface of Earth). Theequilibrium achieved is a dynamic one,...
- Q Problem 1. Calculate the average speed of nitrogenmolecules (N2) in air at room temperature (∼ 300 K). Compare to thespeed of sound, which is about 343 m/s at the same...
- Q 1.Suppose you pour exactly 15ml of water into a 21.0cm tallcylinder that is 2.80cm in diameter. you then add oil(p=920kg/m^3)to the top. what is the total pressure at the bottom...
- Q Suppose that the dipole moment associated with an iron atom ofan iron bar is 1.7 × 10-23 J/T. Assume that all theatoms in the bar, which is 7.0 cm long...
- Q Three point charges are placed on the x-y plane: a +40.0nCcharge at the origin, a -40.0nC charge on the x axis at 10.0cm, anda +100.0nC charge at the point (10.0cm,...
- Q Complete the following statement: The maximum speed at which acar can safely negotiate an unbanked curve depends on all of thefollowing factors exceptA) the diameter of the curve.B) the acceleration...
- Q What condition is necessary for a shock wave to be created? Howare sonic booms (a kind of sound wave) and Cherenkov radiations (akind of light wave) similar? How are they...
- Q In the inside of a TV set an electron is accerlerated by apotential difference of 20 kV in an evacuated tube. It is thenpassed through an uniform magnetic field of...
- Q An4.00 mm -tall object is 22.5 cm from the center of a silveredspherical glass Christmas tree ornament 5.95 cm in diameter.What is the position of its image (measured from the...
- Q An artificial satellite is in a circular orbit d=470.0 km abovethe surface of a planet of radius  r=3.95×10^3 km. Theperiod of revolution of the satellite around the planet is T=1.15hours. What...
- Q A mass weighing 12lb stretches a spring 10in.. The mass isattached to a viscous damper with damping constant 3lb*s/ft. Themass is pushed upward, contracting the spring a distance of 2in,and...
- Q A microscope is used to examine a sample of bacteria that arespread on glass. If the diameter of the objective is twice itsfocal length and the sample is near the...
- Q A solid bowling ball with a radius of 10.9 cm and a mass of 7.3kg rolls along a bowling alley at a linear speed of 2.6m/s.  What is its translational kinetic...
- Q A bullet of mass 0.0016 kg moving at 499 m/s impacts a large fixed block of wood andtravels 6.7 cm before comingto rest. Assuming that thedeceleration of the bullet isconstant,...
- Q A quidditch match is going on between Hufflepuff and Ravenclaw.A Hufflepuff chaser is flying 10 degrees north of east at a speedof 5 m/s. A bludger is heading east at...
- Q Two moles of helium are initially at a temperature of 29.0 ∘Cand occupy a volume of 2.90×10−2 m3 . The helium firstexpands at constant pressure until its volume has doubled....
- Q A) The potential energy (U) of an object of mass m at a distanceR from the center of the earth can be expressed as, U= -GMm/R.Where is the reference location...
- Q If a closed system loses 2200 J of heat (to the surroundingenvironment) and 800 J of work is done on thesystem then what was the change in the internal energy...
- Q In an isobaric compression of an idea gas, a) the internalenergy of the gas remains constant,    b) noheat flows into the gas, c) no work is done on the gas, d)...
- Q Write the three Newton’s Laws of motion and give one example foreach Law:Newton’s First Law:Newton’s second Law:Newton’s Third Law:b)What is the difference between elastic and inelastic Collisonin terms of total...
- Q 1) For a concave mirror at what object distance does theassociated image transition between upright and inverted?2) As the object distance increases through the distance youanswered in part one does...
- Q A.What is an electrical transformer? Discuss basic principles ofoperation and applications of electrical transformers. Can yourelate electromagnetic induction to the operation atransformer?B.Discuss similarities and differences between RL and RLCCircuits. How...
- Q You are to explain why a baseball can be made to curve in flightaccording to the appropriate concepts presented in Biomechanics.use terms like magnus force, lift, bernouli principle.
- Q My NotesA 5000-kg freight car rolls along rails with negligiblefriction. The car is brought to rest by a combination of two coiledsprings as illustrated in the figure below. Both springs...
- Q Please select all that are correct.Select one or more:a. If two trucks (same model) are driving with the samevelocity, the empty truck has less momentum than the truck fullyloaded with...
- Q A 456 g oscillator has a speed of 98.0 cm/s when itsdisplacement is 3.00 cm and 69.0 cm/s when its displacement is 5.30cm.What is the oscillator's maximum speed?
- Q If you increase thepotential difference or electromotive force across a resistance ina circuit the current flowing through that device will___.Question 8 options:increase.decrease.remain the same.get scared and gohome..In a parallel circuit,if...
- Q A proton starts on a plate with potential of 5.0 x 10^3 V aty=0m. It then enters a region in which there is magnetic field of2.0 T pointing out of...
- Q In the figure below, the battery has potential difference V =9.0 V, C2 = 3.0
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