Physics question and answers for October 07, 2023
- Q 1. Real heat engines, like the gasoline engine in a car, alwayshave some frictionbetween their moving parts, although lubricants keep thefriction to a minimum. Would aheat engine with completely frictionless...
- Q 14. If the photon is travelling towards earth, from a regionwith lower gravitation, the shift will be towards a _______ in thewavelength.a. Increaseb. Decreasec. No changed. None of the above15....
- Q A spring stretches4.0cm when a load of 20N suspended. How much will the springstretch if 50.0N load is suspended from it and it does not reachit's elastic limit?2. You purchase...
- Q A toy car starts from rest and accelerates on a straight road ata rate of 3m/s^2 for 5 seconds. In the next 2 seconds, it continuesto move at a constant...
- Q How would astronomers use spectra A, B and C to preciselycalculate how fast the star was moving? How would the speed thestar is moving allow astronomers to be able to...
- Q A small metal sphere has a mass of 0.15 g and a charge of -21.0nC. It is 10.0 cm directly above an identical sphere that has thesame charge. This lower...
- Q A ray of light impinges from air onto a block of ice (n= 1.309) at a 33.0
- Q An electron is accelerated through 2400 V from rest and thenenters a region where there is a uniform 1.70-T magnetic field.What are (a) the maximum and (b) the minimum magnitudes...
- Q You have two blocks, with respective masses of 8 kg and 12 kgsitting next to each other on a table. You decide to move them bothtogether, and push on the...
- Q Two friends, Barbara and Neil, are out rollerblading. Withrespect to the ground, Barbara is skating due south at a speed of3.5 m/s. Neil is in front of her. With respect...
- Q A 3.0-cm-diameter, 14-turn coil of wire, located at z = 0 in thexy-plane, carries a current of 7.5 A. A 2.0-mm-diameter conductingloop with 2.0× 10^−4 Ω resistance is also in...
- Q In class we learned about Kate, a bungee jumper with mass ? =50.0 kg who jumps off a bridge of height â„Ž = 25.0 m above a river.After she jumps,...
- Q A shot-putter throws the shot with an initial speed of 11.2 m/sfrom a height of 5.00 ft above the ground. What is the range of theshot if the launch angle...
- Q Ideal vs real batterya. An ideal battery doesn't exist, are all batteries real?b. Is the chemical reaction the reason why there is internalresistance?c. When learning ohms law why to use...
- Q A spring is attached to an inclined plane as shown in thefigure. A block of mass m = 2.75 kg is placed on the incline at adistance d = 0.294...
- Q We often think about two-dimensional motion in terms of aprojectile, like someone throwing a ball up in the air. Consider,instead, the surface of an air-hockey table, where the puck travelshorizontally...
- Q (a) Suppose a meter stick made of steel and one made of invarare the same length at 0°C. What is their difference in length at21.5°C? The coefficient of thermal expansion...
- Q If a system feels any external force, must it then by necessitynot satisfy conservation of momentum? What if it feels two suchexternal forces that happen to balance? What if it...
- Q 1. White dwarfs are not included in the luminosityclassification because they are:a) no longer producing energy by nuclear reactionsb) too smallc) not yet active stars; they have not yet begun...
- Q True or false- the way we connect multiple light bulbs in (seriesor in parallel) affects the brightness of all of them.
- Q Please answer for college physics discussion post. Please onlytype out the response as when writing it and uploading it isdifficult to read. Thanks!Respond to the following in detail:In your own...
- Q A potential difference of 53 mV is developed across the ends ofa 12.0-cm-long wire as it moves through a 0.27 T uniform magneticfield at a speed of 4.0 m/s. The...
- Q What are some of the reasons for the Linear Hypothesis proponents(those who believe in it) and opponents (those who don’t agree withit) ?
- Q How are the properties of magnetic field lines similar to theproperties of electric field lines?How are they different? (atleast three for each) Thanks for your help.
- Q The Tevatron at Fermilab is a cyclotron capable of producing amaximum energy of 2.0 TeV (2×1012eV). Itscircumference is 6.4 km. (a) How fast would proton be moving inthe Tevatron? How...
- Q Work on a sliding crate.A worker pushes a 47.0 Kg crate across a level horizontal floorby applying a constant force of exactly 150.0 N at an angle of 23.0degrees below...
- Q Serena's average serve is about 120 mph! Before you begin youwill need to convert that to meters per second. It takes the eyeabout 100 milliseconds to tell the brain it's...
- Q A series of object are being rotated. The same net torque isbeing applied to each object. Rank the object in order of theresulting angular acceleration (1=lowest).( ) A solid disk...
- Q Find the magnitude and direction of the resultant of twoconcurrent forces of 50 and 75 N acting on a body at angle of 50degrees with each other Use the graphical...
- Q For the two state paramagnet, explain why the magnetization Mapproaches zero at high temperatures.
- Q ​​​​​Explain the principleand construction of a hydrometer. What is the purpose of the commonmeasurements of the specific gravities of an automobile’s radiatorcoolant and battery electrolyte?
- Q Suppose the electric field between the electric plates in themass spectrometer of Figure 27-33 in the textbook is 2.64×104 V/mand the magnetic fields are B=B′=0.36T. The source contains carbonisotopes of...
- Q how long it takes for one gallon of tap water (40 F) in acontainer ( fiberglass, metal, plastic) sitting in a room (72 F) torise one degrees F?Thank you
- Q The potential energy shared by two atoms separated by a distancer in a diatomic molecule is given by the Lennard-Jones function (?0and ?0 are constants): ?(?) = ?0 [( ?0/?)^12...
- Q Questions for my lab:What is the significance of the observation of discrete spectrallines in the emission spectrum of hydrogen?What is the possible effects due to the adjustment of thespectrometer in...
- Q 1.                            Celeste Orion, an assistant coach for The Vanishing Planet SoccerTeam has been asked to evaluate each of the team’s players todetermine which players kick with the highest velocity. Celesteborrows a...
- Q In the Olympic shot-put event, an athlete throws the shot withan initial speed of 12.0m/s at a40.0? angle from the horizontal.The shot leaves her hand at a height of 1.80...
- Q What is the difference between static and kinetic friction.Define both, write their SI unit and dimension. Write down themathematical statement (formula) that allows us to calculate theforce of friction. Explain...
- Q Consider an old-fashioned bicycle with a small wheel of radius 0.51m and a large wheel of radius 0.8 m. Suppose the rider starts atrest, accelerates with a constant acceleration for...
- Q A 2.0-kg ball moving at 10 m/s makes an off-center collisionwith a 3.0-kg ball that is initially at rest. After the collision,the 2.0-kg ball is deflected at an angle of...
- Q 1. A 1.5- volt battery is connected across an LED bulb, but thebulb does not “light up.†What are two possible reasons why it’snot lighting? (Both the battery and LED...
- Q A transverse sinusoidal wave on a string is moving in the−x-direction. Its speed is 30.0 m/s, and its period is 20.0 ms. Att = 0, a colored mark on the...
- Q Lions can run at speeds up to approximately 80.0 km/h. A hungry106 kg lion running northward at top speed attacks and holds onto a37.5 kg Thomson's gazelle running eastward at...
- Q An old Biblical story tells of David, a small warrior engaged inman-to-man combat with Goliath, a much larger adversary. In thestory, David uses a sling to increase the speed of...
- Q gedananken-experiment. explain thebehavior of a yo-yoin terms of conservation of mechanical energy
- Q A rod of length 22.00 cm has linear density (mass per length)given byλ = 50.0 + 16.0xwhere x is the distance from one end, and λ is measured ingrams/meter.(a) What...
- Q A wind turbine is initially spinning at a constant angularspeed. As the wind's strength gradually increases, the turbineexperiences a constant angular acceleration 0.116 rad/s2. Aftermaking 2870 revolutions, its angular speed...
- Q how does an intensifying screen work and what does it do? Thegoal is to be able to understand what the question is asking, beable to understand the answer, and also...
- Q 4. A boy stands on a diving board and tosses a stone into aswimming pool. The stone is thrown from a height of 2.8 m above thewater surface with a...
- Q Understand and be able to state the followings:• Archimedes’ Principle• Pascal’s Principle• Bernoulli’s Principle• Hooke’s Law• Newton’s Law of Cooling• First Law of Thermodynamics• Second Law of Thermodynamics
- Q A single-turn square loop of wire, 2.00 cm on each edge, carriesa clockwise current of 0.160 A. The loop is inside a solenoid, withthe plane of the loop perpendicular to...
- Q A 1.0-cm-tall object is 100 cm from a screen. A diverging lenswith focal length -20 cm is 20 cm in front of the object.a. What is the focal length of...
- Q Can someone please explain rotational motion?
- Q You take your trusty 120 turn solenoid, with 20 cm diameter andspin it at a rate of 10 times per second in a magnetic field thatyou have constructed with two...
- Q A 32.0-μF capacitor is connected to a 53.0-Ω resistorand a generator whose rms output is 30.0 V at 60.0 Hz.(a) Find the rms current in the circuit.______ A(b) Find the...
- Q Two point charges 1.8 cm apart have an electric potential energy-180 μJ . The total charge is 31 nCWhat are the two charges? Answer in nC
- Q An argon laser that has a wavelength of 455 nm shines on adouble-slit apparatus, which produces an interference pattern on ascreen that is 10.0 m away from the slits. The...
- Q Tipler6 24.P.053.soln.A 90-pF capacitor and a 360-pF capacitor are both charged to2.50 kV. They are then disconnected from the voltage source and areconnected together, positive plate to negative plate and...
- Q very massive black holes with masses of Billions of solar massesare primarily formed how?A.They have formed from a collapse of a giant gas cloudB.They are primarily formed through accretion of...
- Q A cannon fires a cannon ball at an angle of θ0 = 30.0°above the horizontal axis. The initial speed of the ball is 395 m/s. Ignore air resistance for all...
- Q Calculate the gauge pressure (in Pa) inside a soap bubble 2.4 cmin radius using the surface tension γ = 0.022 N/m for the solution.Enter a number with one digit behind...
- Q A cue ball traveling at 5.93 m/s makes a glancing, elasticcollision with a target ball of equal mass that is initially atrest. The cue ball is deflected so that it...
- Q Electrons with a speed of 1.1
- Q Is momentum conserved in all of theexperiments? Please give a complete description with examples asneeded supporting your response.2.Is kinetic energy conserved in all of theexperiments? Please give a complete description...
- Q , on a hill. Dr. L., Jimmie and Kepler (Total mass = MT ) areall on a massless sled together. They are on a hill that is at anangle of...
- Q A magnetic field has a magnitude of 1.2e-3 T, and an electricfield has a magnitude of 5.1e3 N/C. Both fields point in the samedirection. A positive -1.8 microC moves at...
- Q A guard rail at the front row of the second deck of a sportsstadium is 33 inches high. When someone sits back normally in aseat with a seat back in...
- Q 1. Two 2.0 cm by 2.0 cm metal electrodes are spaced 1.0 mm apartand connected by wires of the terminals of a 9.0 V battery.a. What are the charge on...
- Q The position of a particle moving along an x axis isgiven by x = 16.0t2 -6.00t3, where x is in meters andt is in seconds. Determine (a) theposition, (b) the...
- Q A chimney (length 17.6 m, mass 823 kg] cracks at the base andtopples. Assume: - the chimney behaves like a thin rod, and doesnot break apart as it falls. -...
- Q You drive on Interstate 10 from San Antonio to Houston, half thetime at 63 km/h and the other half at 90 km/h. On the wayback you travel half the distance...
- Q The magnetic field 39.0 cm away from a long, straight wirecarrying current 4.00 A is 2050 nT.(a) At what distance is it 205 nT?cm(b) At one instant, the two conductors...
- Q A disk turns through an angle of β(t)=Ct2 -Bt3 where C=3.20 rad/s2 and B= 0.500rad/s3.Calculate the angular acceleration α(t) and velocity w(t) as afunction of time.
- Q Isolated molecular clouds can have a temperature as low as 20 Kand a particle density as great as 1.2×105 per cubiccentimeter.What is the minimum mass that a cloud with these...
- Q The coefficient of friction (static and kinetic) between anobject and a surface can be measured by putting the object on anadjustable inclined plane. (a) Draw a free-body diagram for theobject,...
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