Physics question and answers for September 16, 2023
- Q In an old-fashioned amusement park ride, passengers stand insidea 5.0-m-diameter hollow steel cylinder with their backs against thewall. The cylinder begins to rotate about a vertical axis. Then thefloor on...
- Q An object's weight is W0 on the earth.a. What would be its weight (in terms of W0) if the earth hadtwice its present mass, but was the same size?b.What would...
- Q Problem 1: For all of the following problems,imagine a crane that is lifting a weight of mass m through a heighth at constant speed, and consider the following three choices...
- Q How can I find the force of a laser given wavelength and power?Is it just momentum or momentum multiplied by number of phtons orsomething else?
- Q A projectile is launched with speed v0 and angleθ. Derive an expression for the projectile's maximumheight h.A baseball is hit with a speed of 35.0 m/s . Calculate itsheight if...
- Q A heat engine operates between two reservoirs at T2 =600 K and T1 = 350 K. It takes in 1 000 J of energy fromthe higher-temperature reservoir and performs 250...
- Q A particle undergoes a constant acceleration of 4.00 m/s2. Aftera certain amount of time, its velocity is 12.2 m/s. (Whereapplicable, indicate the direction with the sign of your answer.)(a) If...
- Q True or FalseHeat Travels slower in air than in liquids or solids.
- Q A metal sphere with radius ra is supported on an insulatingstand at the center of a hollow, metal, spherical shell with radiusrb. There is charge +q on the inner sphere...
- Q A bicycle wheel has a diameter of 63.0 cm and a mass of 1.74 kg.Assume that the wheel is a hoop with all of the mass concentratedon the outside radius....
- Q Captin Kirk has been forced to take the Enterprise to the centerof the galaxy, which is approximately 26000 light-years from theEarth, but the warp drive is broken so that the...
- Q Body A in the figure weighs 92 N, and body B weighs 71 N. Thecoefficients of friction between A and the incline are μs = 0.51and μk = 0.22. Angle...
- Q You find a long spring and decide to create some standing waves.You note that the spring has an unstretched length of 2.0 m and aweight of 20.0 N. You anchor...
- Q Attempt 4 A uniform, solid sphere of radius 5.50 cm and mass1.25 kg starts with a purely translational speed of 3.25 m/s at thetop of an inclined plane. The surface...
- Q A 1830-kg car experiences a combined force of air resistance andfriction that has the same magnitude whether the car goes up ordown a hill at 34.5 m/s. Going up a...
- Q 1.Which of the following is a consequence of SpecialRelativity?A.Length contractionB.Time dilationC.The speed of light is an absolute quantityD.All of the aboveQUESTION 22.What is a possible application of the principle of...
- Q You might have seen sunglasses that change to a color whenexposed to light, while revert to transpaparency when the light isblocked or dimmed. Thematerical used to make the glasses is...
- Q The ground temperature a few meters below the surface is fairlyconstant throughout the year, and is near the average value of theair temperature. In areas in which the air temperature...
- Q A 0.00618-kg bullet is fired straight up at a falling woodenblock that has a mass of 1.52 kg. The bullet has a speed of 616 m/swhen it strikes the block....
- Q A 0.18 kg puck is initially stationary on an ice surface withnegligible friction. At time t = 0, a horizontal forcebegins to move the puck. The force is given by...
- Q TYPE WRITTIN PLEASE !!!WHAT IS UNUSUAL ABOUT THE DISCOVERY OF URANUS ?
- Q A truck accelerates uniformly from rest to 19.5 m/s in 5.3 salong a level stretch of road. Determine the average power requiredto accelerate the truck for the following values of...
- Q A student stands several metres in front of a smooth reflectingwall, holding a board on which a wire is fixed at each end. Thewire, vibrating in its third harmonic, is...
- Q Describe the relationship between wavelength and frequency forelectromagnetic radiation. What is the principle difference betweena radio wave, light, and x-rays?
- Q Obtain the wavelengths of a photon and an electron that have thesame energy of 3.0eV.
- Q Abicyclist starting at rest produces a constant angular accelerationof 1.6 rad/s^2 for wheels that are 38 cm in radius. What is thebicycles linear acceleration? What is the angular speed of...
- Q A) Find the time tH it takes the projectile to reach its maximumheight H.B) Find tR, the time at which the projectile hits the groundafter having traveled through a horizontal...
- Q A car is moving at 55 miles per hour. The kinetic energy of thatcar is 5 × 105 J.How much energy does the same car have when itmoves at 98...
- Q A 0.280-kg piece of aluminum that has a temperature of -166
- Q 12) Two identical particles of charge 6 μC and mass 4 μg areinitially at rest and held 4 cm apart. How fast will the particlesmove when they are allowed to...
- Q A uniform stick 1.3 m long with a total mass of 270 g is pivotedat its center. A 3.8-g bullet is shot through the stick midwaybetween the pivot and one...
- Q A 4.0×1010kg asteroid is heading directly toward the center ofthe earth at a steady 32 km/s. To save the planet, astronauts strapa giant rocket to the asteroid perpendicular to its...
- Q A ball of mass m moving with velocity v⃗ i strikes a verticalwall as shown in (Figure 1). The angle between the ball's initialvelocity vector and the wall is θi...
- Q Unlike a roller coaster, the seats in a Ferris wheel swivel sothat the rider is always seated upright. An 80-ft-diameter Ferriswheel rotates once every 24 s.What is the apparent weight...
- Q As a city planner, you receive complaints from local residentsabout the safety of nearby roads and streets. One complaintconcerns a stop sign at the corner of Pine Street and 1st...
- Q What is the effective mass? How is this different fromtrue mass?
- Q ConstantsA 3.20 kg box is moving to the right with speed 8.00 m/s on ahorizontal, frictionless surface. At t = 0 a horizontalforce is applied to the box. The force...
- Q Two-lens systems. In the figure, stick figure O (theobject) stands on the common central axis of two thin, symmetriclenses, which are mounted in the boxed regions. Lens 1 is mountedwithin...
- Q 1. Consider a gas of molecules in thermal equilibrium withtemperature T and a number n per area, confined to a 2-D flatsurface.-What is the kinetic energy per area of the...
- Q Can someone explain to me Bohr's model of hydrogen and BohrSelection Rule
- Q An object with m1 = 5kg is attached to a spring ofnegligible mass. This mass/spring combination is then slidhorizontally on a frictionless surface with a velocity of 5m/stowards a stationary...
- Q An 18-kg sled starts up a 36 ∘ incline with a speed of 2.2 m/s .The coefficient of kinetic friction is μk= 0.25.How far up the incline does the sled...
- Q How did the Conservation of Momentum allow Chadwick to prove theexistence of the neutron when it was believed that the combinationof protons and electrons alone made atoms?
- Q home / study / science / physics / physics questions and answers/ this is my second time posting this: question: i have beenworking on this and i have done ...Question:...
- Q An air-track cart with mass m1=0.28kg and initial speedv0=0.80m/s collides with and sticks to a second cart thatis at rest initially.Part AIf the mass of the second cart is m2=0.53kg,...
- Q 1.A) Mountain rescue officers trigger an avalanche by firing a gun ata distant mountain slope. The muzzle velocity of the gun is 190m/s. The gun muzzle is at sea level...
- Q What is the difference in finding magnitude of a force on acharge and finding the net electric force acting on a charge?If given three charges set at a certain places...
- Q you have likelyexperienced a shock in the winter after walking across carpet andtouching another person. explain how the types of soles (rubber orleather) on the shoes you both are wearing...
- Q Find a relationship between the equilibrium temperature of aspherical object and the distance from the sun in terms of theSun's emission temperature
- Q The law of entropy can also be called the law of increasingdisorder; but this law seems to contradict the existence of livingorganisms that are able to organize chemicals into organicmolecules....
- Q Describe why the sound of an oncoming siren changes as it passesyou on the street. Please include terms such as blue and red shift.What is one way this is used...
- Q A 1246 kg weather rocket accelerates upward at 11.7m/s2. It explodes 1.6 s after liftoff and breaks intotwo fragments, one twice as massive as the other. Photos revealthat the lighter...
- Q Research how an internal combustion engine operates. Describefour steps of a combustion cycle. What materials go in and out ofthe engine during each step? How many cylinders are involved in...
- Q Blocks A (mass 2.00 kg ) and B (mass 12.00 kg , to the right ofA) move on a frictionless, horizontal surface. Initially, block Bis moving to the left at...
- Q What are the characteristics for random motion? Explain howdifferent or similar it is to directed motion.If the average total displacement in either the x- or they-direction is zero for all...
- Q Many people assume air resistance acting on a moving object willalways make the object slow down. It can, however, actually beresponsible for making the object speed up. Consider a 310-kg...
- Q A coin is sitting on a record as sketched in the figure below.It is found that the coin slips off the record when the rotationrate is 0.42 rev/s. What is...
- Q A 0.115-kg remote control 15.8 cm long rests on a table, asshown in the figure below, with a length L overhanging itsedge. To operate the power button on this remote...
- Q Asteroids can be classified into two broad groups based on theircomposition and location: carbon-rich asteroids dominate the outerpart of the asteroid belt, whereas metal-rich asteroids dominatethe inner part of the...
- Q A dart of mass m is fired at and sticks into a block of mass Mthat is initially at rest on a rough, horizontal surface. Thecoefficient of kinetic friction between...
- Q A bucket of water is sliding down a frictionless ramp, whoseangle of inclination is \thetaθ. What angle does the water surfacemake with the horizontal? Is it zero, \thetaθ, or greater...
- Q A cell membrane has a resistance and a capacitance and thus acharacteristic time constantPart AWhat is the time constant of a 7.7 nm -thick membranesurrounding a 4.0×10−2 mm -diameter spherical...
- Q I can roughly feel a force of 10 newton only by considering theweight of 1 kilogram object.How to imagine the following measurements?Maximum horsepower 16 hp @ 9,500 RPMMaximum torque 12.76...
- Q An AC voltage with an amplitude of 130 V is applied to a seriescombination of a 224 μF capacitor, a 114 mH inductor, and a 15.7 Ωresistor.Calculate the power dissipated...
- Q Application: Heating Food in a Microwave Oven. A frozen pizza ismarketed to be heated in a microwave oven. Asan engineer you are asked to write heating instructions,specifically how long should...
- Q 1. A certain satellite travels in an approximately circularorbit of radius 7.5 × 106 m with a period of 6 h 27 min.Calculate the mass of its planet from this...
- Q Elements that appear in the same column of the periodic tableoften share similar chemical properties. In the case of thealkaline earth metals, this is troublesome since the body treatscalcium (necessary...
- Q Two small metal cubes with masses 2.0 g and4.0 g are tiedtogether by a 4.9-cm-long massless string and are at rest on africtionless surface. Each is charged to +2.2 μC...
- Q A hiker starts at his camp and moves the following distanceswhile exploring his surroundings: 74.0 m north, 2.20 ?102 m east, 1.20 ? 102 m at an angle 30.0
- Q Inside a NASA test vehicle, a 3.50-kg ball is pulled along by ahorizontal ideal spring fixed to a friction-free table. The forceconstant of the spring is 227 N/m . The...
- Q how does the prescence of an idler gear affect the relationshipbetween a driver gear and a driven gear in a gear train?
- Q Where is the image in a plane mirrorformed?Your friend Noelle suggests the following hypothesis:\"The image of an object formed by a plane mirror is formed on thesurface of the mirror.\"...
- Q Calculate the maximum rate at which a rocket can expel gases ifits acceleration cannot exceed seven times that of gravity. Themass of the rocket just as it runs out of...
- Q Consider a small sized company that is interested in setting upa network for their business. The company has a total of 350employees: 250 employees are located on five floors of...
- Q A cart with mass 330 g moving on a frictionless linearair track at an initial speed of 2.1 m/s undergoes anelastic collision with an initially stationary cart of unknownmass. After...
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