Physics question and answers for September 08, 2023
- Q what is the between atoms and molecules? how do compounds andelements differ?
- Q A new type of 38.0 W lamp is designed to produce the sameillumination as a conventional 53.0 W lamp. How much energy doesthis lamp save during 370.0 h of use?...
- Q In Fig. 8.3, a bullet of mass 0.01 kg moving horizontallystrikes a block of wood of mass 1.5 kg which is suspended as apendulum. The bullet lodges in the wood,...
- Q A 100 cm^3 box contains helium at a pressure of 1.60 atm and atemperature of 120 ∘C. It is placed in thermal contact with a 190cm^3 box containing argon at...
- Q The point charges in the figure below have the following values:q1 = +2.7
- Q Two hard rubber spheres, each of mass m = 13.8 g, arerubbed with fur on a dry day and are then suspended with twoinsulating strings of length L = 5.25...
- Q Deep-sea divers often breathe a mixture of helium and oxygen toavoid the complications of breathing high-pressure nitrogen. Atgreat depths the mix is almost entirely helium, which has the sideeffect of...
- Q A positive charge q is fixed at the point x = 0, y = 0, and anegative charge -2q is fixed at the point x = a, y = 0.a)...
- Q An astronaut has left the International Space Station to test anew space scooter. Her partner measures the following velocitychanges, each taking place in a time interval 10.9 s . What...
- Q 1. how does proton therapy work2. Clinical application of proton therapy
- Q a)Find the x-component of vectorv⃗  = (310 m/s , 45 ∘ above+x-axis).b)Find the y-component of vectorv⃗  = (310 m/s , 45 ∘ above+x-axis).
- Q The average intensity of a particular TV station
- Q Which of the following statements are true?True False  Magnetic field lines always start at a Northand end at a South pole.True False  When placing a dipole magnet into a magneticfield, it will...
- Q Which  process,conduction, convection, or radiation is most involved withthe  distribution of heat around the earth?
- Q Write about czochralski method (melt) in half of a sheet
- Q Ionization chambers, proportional counters and Gieger-Mullercounters are all gas-filled radiation detectors. Sketch a graph ofthe signal (pulse of charge collected) as a function of the voltageapplied. Describe what happens to...
- Q (a) Find the photon energy and wavelength for the series limit(shortest wavelength) in the Balmer series (nf= 2) for the hydrogen atom.___________eV_________ nm(b) Calculate the wavelength for the three longest...
- Q Starting with 2.50 mol of nitrogen gas (N2) in a container at1.00 atm pressure and 20.0 °C temperature, a student heats the gasat constant volume with 15.2 kJ of heat,...
- Q A small block with mass 0.0400 kg is moving in the xy-plane. Thenet force on the block is described by the potential- energyfunction U(x,y)= (5.90 J/m2 )x2-(3.90 J/m3 )y3.a- What...
- Q A soccer player kicks the ball toward a goal that is 27.6 m infront of him. The ball leaves his foot at a speed of 18.5 m/s andan angle of...
- Q Internal injuries in vehicular accidents may be due to what iscalled the \"third collision\" The first collision is the vehiclehitting the external object. The second collision is the personhitting something...
- Q A 120 V rms voltage at 60.0 Hz is applied across an inductor, acapacitor, and a resistor in series. If the peak current in thiscircuit is 0.84840 A, what is...
- Q For two objects dropped at two different times from the samelocation (e.g. a bridge), while both are stillin free-fall describe how their velocities and their distanceschange through time (neglecting airresistance).An...
- Q Give an example of how each Newtonian Law of Motion is representedin walking. Briefly explain your position in a shortparagraph.
- Q A 0.50-kg mass vibrates according to the equation x = 0.35 sin(5.50 t) where x is in meters and t is in seconds. Determine (A)the amplitude, (B) the frequency, (C)...
- Q (1) A block is placed on a wooden plank, which is initiallyhorizontal. One end of the plank is slowly raised to make it moreand more inclined, and for a while...
- Q Discuss the concepts of inertia and weight .Discuss the contribution of both bone and muscle to theinertia properties surrounding movement
- Q Suppose a 10 kg ball makes a one dimensional collision with a 5kg ball. Think about what could happen to the velocity of the 5 kgball as a result of...
- Q A  green laser operates at 488.0 nm with an outputpower of 2.5 mW. Calculate the average output in photons/s (“photonfluxâ€). What would the output power be for the same flux of...
- Q A spring (70 N/m ) has an equilibrium length of 1.00 m. Thespring is compressed to a length of 0.50 m and a mass of 2.2 kg isplaced at its...
- Q A charge of -5.50nC is spread uniformly over the surface of oneface of a nonconducting disk of radius 1.00cmPart AFind the magnitude of the electric field this disk produces at...
- Q A 4 kg block is placed at the top of an inclined plane. Theplane is 2.5 meters long and inclined at 34°. The coefficient ofkinetic friction between the block and...
- Q What is the relationship between the index of refraction and thedensity of the transparent material? Is this relationship a rule ofthumb or is it an absolute?
- Q Water flows through the pipe in the figure below and exits tothe atmosphere at the right end of section C. The diameter of thepipe is 2.12 cm at A, 4.24...
- Q In the series RLC circuit of problem 1 the resistor is replacedwith the higher available value of 68 KOhm. The circuit is drivenin forced oscillation regime up to a frequency...
- Q Explain the mathematical and graphical relationship betweenvelocity and position using your own words.
- Q A mole of atoms is 6.02 x 10^23 atoms. To the nearest order ofmagnitude, how many moles of atoms are in a 8 kg domestic cat? Themasses of a hydrogen...
- Q Acceleration of Gravity1) Friction. Explain the role of friction in the measurement ofg.2) Time. The time resolution of the timer used in the experimentis 0.1 ms (milliseconds). Do you expect...
- Q Most string theory compactifications analyzed so far have asbackgrounds a conformal field theory corresponding to a nonlinearsigma model with a Calabi-Yau target space, or some relativelyclassical background, possibly with orbifolding....
- Q A parallel plate capacitor with plate separation d is connectedto a battery. The capacitor is fully charged to Q Coulombs and avoltage of V. (C is the capacitance and U...
- Q An energy bill on the floor of the House of Representatives isproposed by a congressperson from Nebraska that would require allcars to use fuel that contains at least 15% ethanol,...
- Q A simple pendulum consists of a small object of mass m= 0.150 kgsuspended from a support stand by a light string. The string has alength L= 0.750 m. The string...
- Q The spin cycles of a washing machine have two angular speeds,416 rev/min and 632 rev/min . The internal diameter of the drum is0.560 mPart AWhat is the ratio of the...
- Q A converging lens has a focal length of 21.1 cm.(a) Locate the object if a real image is located at a distancefrom the lens of 63.3 cm.distancecmlocation(b) Locate the object...
- Q A box of mass 10.2 kg with an initial velocity of 2.1 m/s slidesdown a plane, inclined at 28â—¦ with respect to the horizontal. Thecoefficient of kinetic friction is 0.69....
- Q Two satellites, A and B, both ofmass m = 115 kg, move in the same circular orbit of radius r = 7.57106 m around Earth but in opposite senses of...
- Q Emily throws a soccer ball out of her dorm window to Allison,who is waiting below to catch it.If Emily throws the ball at an angle of 30∘ below the horizontalwith...
- Q Given the mass of two blocks that collide, and the velocities ofeach block before and after the collision, be able to determinewhether the collision was elastic, partially or completelyinelastic, or...
- Q A 0.313-m-thick sheet of ice covers a lake. The air temperatureat the ice surface is -15.9 °C. In 4.70 minutes, the ice thickensby a small amount. Assume that no heat...
- Q A 4100 kg open railroad car coasts along with a constant speedof 9.90 m/s on a level track. Snow begins to fall vertically andfills the car at a rate of...
- Q explain why it makes some sense that a large temperaturedifference enables greater efficiency.
- Q An alpha (?) particle is the nucleus of a 4He atom and consistsof 2 neutrons and two protons bound together. Let's take apart an ?particle, step by step, looking at...
- Q two cylinders with the radius r= 0.650 m are rolled with outslipping down an incline that desends a vertical distance of 2.45meters each cylinder has equal mass m=3.68kg but one...
- Q Neutron Decay 4 On their own, neutrons are unstable particleswith a half-life of 618 s when at rest. They decay into a proton,an electron and an electron antineutrino. Half-life is...
- Q A doughnut contains about 302 Calories. (Note: Theseare \"food\" Calories.) After eating this doughnut, you decide tocompensate by taking the stairs instead of using the elevator. Ifeach stair has a...
- Q A mass m = 78 kg slides on a frictionless track that has a drop,followed by a loop-the-loop with radius R = 15.4 m and finally aflat straight section at...
- Q 1. A vibrating string is cut in half. The fundamentalfrequency of the string will be...a. doubledb. unchangedc. reduced by half2.On a pipe organ, for a closed pipe, if you double...
- Q An ac generator has a frequency of 7.5 kHz and a voltage of 35V. When an inductor is connected between the terminals of thisgenerator, the current in the inductor is...
- Q An energy saving lamp with a power of P = 11 W emits anelectromagnetic wave uniformly in all directions. Calculate thewave at a distance of r = 3 m from...
- Q What are probable healt effects of:OzonePartiuclate matterSulfur OxideLeadCarbon MonoxideNitrogen DioxideTo children, average adults, and the elderly??(include your sources)
- Q Please explain the contiguity of spacetime?
- Q A mysterious tower has been constructed at the edge of agridiron football field. Even more mysteriously, the field has beenmarked carefully in meters instead of yards. On top of the...
- Q A magnetic field is along the xy plane and the z plane isperpendicular to the magnetic field. In which plane(s) is themagnetic flux the greatest? Please explain.
- Q At t = 0s, the leading edge of a wave (wavelength 1m) is 3m tothe left of a boundary. The wave is moving to the right at 1m/s.The transmitted wave...
- Q A 16.5-μμF capacitor is charged to a potential of 60.0 V andthen discharged through a 75.0 ΩΩ resistor.1)How long after discharge begins does it take for the capacitorto lose 90.0%...
- Q Projectile Motion 2DA batter hits a ball with initial speed 20m/s at a launch angleof 60
- Q A hollow, thin-walled sphere of mass 11.0 kg and diameter 48.0cm is rotating about an axle through its center. The angle (inradians) through which it turns as a function of...
- Q Most of us know intuitively that in a head-on collision betweena large dump truck and a subcompact car, you are better off beingin the truck than in the car. Why...
- Q A large boulder is ejected vertically upward from a volcano withan initial speed of 40.7 m/s . Air resistance may be ignored. A) Atwhat time after being ejected is the...
- Q Throw a ball so that it is projected vertically upward. Catch itat the same height it was released. Have a partner measure the timethe ball is in the air -...
- Q A point particle with chargeq = 4.2 ?Cis placed on the x axis atx = ?10 cmand a second particle of chargeQ = 7.8 ?Cis placed on the x axis...
- Q 1. A train moving at a constant speed of 52.0 km/h moves eastfor 38.0 min, then in a direction 45.0° east of due north for 21.0min, and then west for...
- Q A film of oil lies on wet pavement. The refractive index of theoil exceeds that of the water. The film has the minimum nonzerothickness such that it appears dark due...
- Q The great russian physicist LevLandau developed a famous entry exam to test his students. This\"Theoretical Minimum\" contained everything he considered elementaryfor a young theoretical physicist. Despite its name, it wasnotoriously...
- Q What type of motion is occurring when the slope of a velocityvs. time graph is zero? Also, what type of motion is occurring whenit's not zero
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