Physics question and answers for August 25, 2023
- Q A daredevil college professor wants to jump across a canyon ofdepth 100m and width 50m on his motorcycle. He uses a ramp inclinedat 60 degrees to cross the canyon.The other...
- Q The vector position of a 3.05 g particle moving in the xy planevaries in time according to r with arrow1 = 3i + 3j t + 2jt2 wheret is in...
- Q Total mass (block plus masses)0.1029 kg0.1529 kg0.2529 kg0.302.9 kg0.3529 kg0.402.9 kgNormal Force1.01 N1.50 N2.48 N2.97 N3.46 N3.95 Nfsmax0.06 * 9.8 = 0.588 N0.13 * 9.8= 1.27 N0.225 * 9.8 =...
- Q A 18.5 µF spherical capacitor is composed of two metallicspheres, one having a radius twice as large as the other. If theregion between the spheres is a vacuum, determine the...
- Q 1.What is the unit for kinetic energy?2.A collision in which kinetic energy is conserved is calledwhat?3. It takes no work to hold a cheerleader in the air, as shownhere. If...
- Q a stunt driver's car is moving at 24.2 m/s along a straightroad. The road comes to an abrupt stop 21.2 m before a drop off.The coefficient of friction of the...
- Q A 50.0 g object is attached to a horizontal spring with a forceconstant of 5.0 N/m and released from rest with an amplitude of20.0cm. What is the velocity of the...
- Q In reaching her destination, a backpacker walks with an averagevelocity of 1.38 m/s, due west. This average velocity resultsbecause she hikes for 6.44 km with an average velocity of 2.52...
- Q A 25 kg suitcase is being pulled with constant speed by a handlethat is at an angle of 26 ∘ above the horizontal. If the normalforce exerted on the suitcase...
- Q Two wooden crates rest on top of one another. The smaller topcrate has a mass of m1 = 22 kg and the larger bottom crate has amass of m2 =...
- Q An air-filled parallel-plate capacitor has a capacitance of 2.0ïF when the plate spacing is 1.6 mm. (a) What is the area of theplates? (b) What is the maximum voltage Vmax...
- Q Two forces, 80 N and 100 N acting at an angle of 60° with eachother, pull on an object. a) What single force would replace thetwo forces? b) What single...
- Q Just before it landed on the moon, the Apollo 12 lunar landerhad a mass of 1.4×104 kg.Part AWhat rocket thrust was necessary to have the lander touch downwith zero acceleration?Express...
- Q An indy 500 driver is doing 105 m/s, with 100,000 meters and 10sleft in a race. Her car can do a maximum acceleration of 15 m/s^2.Can she finish the race?...
- Q The figure below shows a Ferris wheel that rotates five timeseach minute. It carries each car around a circle of diameter 20.0m.What force (magnitude and direction) does the seat exert...
- Q A particle with rest energy 8.940 GeV decays at rest into twodaughter particles, one with rest energy 6.720 GeV and the otherwith rest energy 130.000 MeV.(a) What is the mass...
- Q why dont we see interference fringes when light shines through awindow?
- Q 1). A car is moving along a straight line defined to be thepositive x direction. Its velocity is measured and found to be afunction of time given by Vx(t)=(alpha)t^2 ,...
- Q Two charges, + q and - q, occupy two corners of an equilateraltriangle, as shown in FIGURE 19-51. (a) If q = 1.8 mC and r = 0.50m, find the...
- Q A very small object with mass 8.10×10−9 kg and positive charge6.20×10−9 C is projected directly toward a very large insulatingsheet of positive charge that has uniform surface charge density5.90×10−8C/m2. The...
- Q Calculate the rate of energy emitted from anincandescent tungsten halogen light bulb as a function ofwavelength (W/m2 per µm versus wavelength in µm). Assume thetungsten filament has a temperature of...
- Q An infinitely long solid cylindrical insulator of radius 13.0 cmhas a non-uniform volume charge density of =4r3 where is in Cm3when r is in meters. Calculate the magnitude of the...
- Q Given two vectors a = 3.6i -3.8j and b =6.3i+8.3jwhat is the magnitude (in m) of the vector a?Find the direction (in ° = deg) of the vector a.Find the...
- Q 3. A solid conducting sphere of radius b carries anet charge of -Q. Select the correct option on the right panel, forthe electric potential V(r) at a radial distance of...
- Q 12) The amount of electrical energy stored in a system of twocharged particles a distance dd apart isUE(d)=kq1q2/dwhere particle 1 has charge q1, particle 2 has charge q2, andCoulomb's constant...
- Q A jet fighter is accelerated from rest to a takeoff speed of 262km/h in a distance of 91.5 m on an aircraft carrier. Assumeconstant acceleration.What is the acceleration of the...
- Q two electrical charges, q1= -20.0 nC and q2= +10.0 nC, arelocated on the x-axis at x= 0 m and x= 1.00 m, respectively. Whatis the magnitude of the electric field...
- Q Water drips from the nozzle of a shower onto the floor 181 cmbelow. The drops fall at regular (equal) intervals of time, thefirst drop striking the floor at the instant...
- Q A 5.4-µC point charge is located at x = 1.1 m,y = 2.9 m, and a -4.3-µC point charge is located atx = 2.3 m, y = -1.9 m.(a) Find...
- Q You're considering installing a 4-foot-high by 8-foot-widepicture window in a north-facing wall (no solar gain) that now hasa total R (specific thickness of material) value of 23. As acompromise between...
- Q Suppose the water at the top of Niagara Falls has a horizontalspeed of 1.20 m/s just before it cascades over the edge of thefalls. At what vertical distance below the...
- Q Option 1 – How We Hear This activity explores how we hear andhow the physical nature of the sound wave determines the quality ofthe sound experience. Structure of the Ear...
- Q In one model of the hydrogen atom, an electron orbits a protonin a circle of radius 5.28×10-11 m with a speedof 2.18×106 m/s. What is the acceleration ofthe electron in...
- Q I take my dogs on an afternoon walk. We leave my house, walkingdue East for 4 km. We then walk 3.5 km at an angle of 35 degreesWest of North....
- Q You push a small mass (with respect to your mass) crate on africtionless surface and it has some acceleration. If you arestanding on the same frictionless surface, what happens to...
- Q Two solid bodies at initial temperatures T1 and T2, with T1 >T2, are placed in thermal contact with each other. The bodiesexchange heat only with eachother but not with the...
- Q One end of a very long wire is rigidly fastened to a post. Theother end is attached to an audio speaker which shakes the end ofthe wire in a direction...
- Q A person in a canoe can paddle his canoe at a steady 3.0 m/s instill water. He wishes to cross a 2.4 km wide river that has acurrent of 1.8...
- Q A trebuchet was a hurling machine built to attack the walls of acastle under siege. A large stone could be hurled against a wall tobreak apart the wall. The machine...
- Q A 10-cm-long thin glass rod uniformly charged to 15.0 nC and a10-cm-long thin plastic rod uniformly charged to - 15.0 nC areplaced side by side, 4.30 cm apart. What are...
- Q A truck traveling at a constant speed of 28 m/s passes a moreslowly moving car. The instant the truck passes the car, the carbegins to accelerate at a constant rate...
- Q 23) In a 5000 m race, the athletes run 1212 laps; each lap is400 m. Kara runs the race at a constant pace and finishes in 17.9min. Hannah runs the...
- Q Explain in terms of the location of the center ofmass, the physical reason why you begin to fall forward when youlean forward far enough.
- Q Light from a fluorescent lamp isobserved through a cloud of cool nitrogen gas. Again, two studentsare having a discussion about the kind of spectra that they wouldsee.Student 1: We wouldsee...
- Q The frequency of light reaching Earth from a particular galaxyis 18% lower than the frequency the light had when it was emitted.a) explain whether the galaxy is moving toward or...
- Q 10 kg crate is pulled 4.9 m up a 34 degree incline by a ropeangled 16 degree above the incline. The tension in the rope is 125N, and the crate's...
- Q A truck with a total mass of 1.72 * 10^3 kg has wheels of radius33.0 cm and moment inertia of 0.800kg-m^2. Find the trucks (a)translational energy and (b) rotational energy...
- Q Why is that the masses for proton and neutron more preciselymeasured in atomic mass units (u) than in megaelectron volts(MeV)?
- Q (i)Use the Huygens principle to explain how plane parallelwavefronts are diffracted at a single aperture.(ii) Use the principle of superposition to explain how coherentlight emerging from two narrow slits can...
- Q If you get a negative impulse, does this mean you lost momentum?I know Impulse=change in momentum. Ex) A ball hits a wall andleaves the wall with a lower velocity than...
- Q Describe rotational motion (angular displacement, angularvelocity, angular acceleration, torque, moment of inertia, etc.).Use equations and words.
- Q Water to a residential area is transported at a rate of 1.5m3/s via 70-cm-internal-diameter concrete pipes with asurface roughness of 3 mm and a total length of 1520 m. In...
- Q (Explain using the law of conservation of momemtum)Â Â When a ball strikes the floor and rebounds, itappears that momentum is not conserved. Is this true? Why or whynot?
- Q What is the wavelength of the -Hz radio wave used by“radio-controlled†clocks and wristwatches?​
- Q A 120 kg crocodile swallows gastrolithes thatare 0.8% of his mass to sink to a lower level. How much would ithave to increase its lung volume in mL tocounteract the...
- Q The 25-lb slender rod has a length of 6 ft. Using a collar ofnegligible mass, its end A is confined to move along thesmooth circular bar of radius 32√ ft....
- Q A bowling ball rolls without slipping up a ramp. If the speed atthe bottom of the ramp is 2.85 m/s and the height of the ramp is0.525 m, what is...
- Q A 60 kg sofa 4m long is carried by James and Sarah. James isholding the sofa 0.2m from an end. Sarah is holding the sofa by theother end. A passing...
- Q A weightlifter works out at the gym each day. Part of herroutine is to lie on her back and lift a 41 kg barbell straight upfrom chest height to full...
- Q A long time ago, in a galaxy far, far away, electric charge hadnot yet been invented, and atoms were held together bygravitational forces. Compute the Bohr radius (a0) andthen =...
- Q The wave function for hydrogen in the 1s state may be expressedas ψ(r) = Ae−r/a0. Determine the normalization constant A for thiswave function. (Use the following as necessary: a0.)
- Q A pendulum clock in an elevator ticks with a period of T=1.7 swhen the elevator is at rest. The elevator starts to move and theperiod increases to Tnew = 1.87...
- Q You attach a 100-g puck to a string and let the puck glide in acircle on a horizontal, frictionless air table. The other end ofthe string passes through a hole...
- Q A 1.5 kg solid cylinder (radius = 0.15 m , length = 0.60 m ) isreleased from rest at the top of a ramp and allowed to roll withoutslipping. The...
- Q A solid disk of mass M and radius R is rotating on the verticalaxle with angular speed w. Another disk of mass M/2 and radius R,initally not rotating, falls coaxially...
- Q Let me know the effectiveness of the deathpenalty?Are there alternative punishments that would be more effective thanthe death penalty?
- Q A point charge with a mass of 1.81 ng and a charge of +1.22 uCmoves in the x-y plane with a velocity of 3.00 x 104 m/s in adirection 15°...
- Q A 170 g block attached to a spring with spring constant 2.1 N/moscillates horizontally on a frictionless table. Its velocity is 19cm/s when x0 = -4.0 cm .A) What is...
- Q Derive the equations for a particle moving near the surface ofthe earth, given by?̈= 2? cos ? ?̇?̈= −2( cos ? ?̇ + ? sin ? ?̇)?̈= −? + 2?...
- Q True/False: Because hot water cools down faster than cold water,an ice cube tray filled with hot water will freeze faster than anice cube tray filled with cold water. Explain your...
- Q Einstein and Lorentz, being avid tennis players, play afast-paced game on a court where they stand 20.0 m from each other.Being very skilled players, they play without a net. The...
- Q The length of a simple pendulum is 0.84 m and the mass of theparticle (the \"bob\") at the end of the cable is 0.23 kg. Thependulum is pulled away from...
- Q A type of foam ear plug has a 26 dB overall EPA noise reductionrating. Sally wants to sleep on her bus ride and decides to usethese earplugs. The noise level...
- Q A bungee jumper of mass 110 kg jumps from a cliff of height120m. The massless relaxed bungee cord has a length of 15 m. Ignorethe height of the body of...
- Q An electron is confined by some potential energy well centeredabout the origin, and is represented by the wave function ψ(x) =Axe−x2/L2, where L = 4.48 nm. The electron's total energy...
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