Physics question and answers for September 28, 2023
- Q Photons with a wavelength of 599 nm in air enter a plate offlint glass with index of refraction n = 1.66. Find the speed,wavelength, and energy of a photon in...
- Q A hot air balloon has a total mass of 750 kg (not including theair in the balloon) and holds a volume of 2.8 x 10^6 L of air.Assume the density...
- Q For an angled launch how would your analysis of the ball'smotion have to change if it fell to a height below it was launched.Clearly identify where and how the analysis...
- Q In a rectangular coordinate system, a positive point charge5.0nC is placed at x=2cm, y=0cm and a negative point charge -5.0nCis placed at x=-2cm,y=0cm. Point P is at x=2cm, y=3cmK=8.99 x...
- Q For this problem, assume salt water and fresh water have thesame density.A large iceberg floats in the ocean. If the iceberg melts, thesea level will:a) stay the sameb) fallc) rise...
- Q Explain why centrifugal force is a false (pseudo) force.
- Q A skier traveling 14.0 m/s reaches the foot of a steady upward20.0o incline and glides 11.5 m up along this slopebefore coming to rest. Using mechanical energy methods what is...
- Q Elmer Fudd pulls a 65.0 kg wooden crate of massm across the floor with a force F at an angle of34.0°. The coefficient of friction between the surfaces is m...
- Q A beaker, filled to the very topwith water, weighs 15 N. A 300 gweight is carefully dropped intothe beaker. The water thatoverflows is wiped away and the beakerreweighed. It weighs...
- Q How does a newton cradle visually demonstrate how NRG andmomentum are conserved. I konw it works mathematically but how doesreleasing balls and having the other two balls on the other...
- Q (a) How many fringes appear between the firstdiffraction-envelope minima to either side of the central maximumin a double-slit pattern if λ = 699 nm, d = 0.200 mm, and a...
- Q 6. One morning while waiting for class to begin, you are readinga newspaper article about airplane safety. This article emphasizesthe role of metal fatigue in recent accidents. Metal fatigueresults from...
- Q 6.  A  10.0-kg  mass  is  traveling  to  the  right  with  a  speed  of  2.00  m/s  on  a  frictionless  horizontal  surface  when  it  collides  with  and  sticks  to  a  second  10.0-kg  mass  that  is  initially  at  rest  but  is  attached  to  a  light  ...
- Q A).what is the intensity in W/m2 of laser beam used to burn tissuethat, when 90% absorbed, puts 520J of energy into a circular spotof 2 mm in diameter in 4...
- Q Your grandfather clock is a simple pendulum with a length of0.994 m. If the clock loses 3 min in a week, how should you adjustthe length of the pendulum so...
- Q what's the safest way to use a meter while testing forvoltage
- Q In the figure, a uniform plank, with a length L of 5.23m and a weight of 280 N, rests on the ground and against africtionless roller at the top of...
- Q Ch 2944. In an atom, an electron has the following allowed energylevels, E1 = 1 eV, E2 = 4 eV and E3 = 6 eV. What are the observedemission and...
- Q Back-of-the-envelope CO: It is well-known (certainly amongastronomers) that the Einstein A-coefficient for the Lyman alpha (n= 2 to n = 1) transition in atomic hydrogen is of order 10^9 s^−1(actually,...
- Q 1. NASA tested a power generation system that involvesconnecting a small satellite to the space shuttle with a conductivewire several kilometers long. Explain how such a system cangenerate electricity.2. The...
- Q Use the Bohr model to calculate the radius, in angstroms, of anHe+ ion with an electron in the n=4 state.r=Ã…Calculate the energy, in joules, of an He+ ion with an...
- Q a.) M, a solid cylinder (M=2.11 kg, R=0.137 m) pivots on a thin,fixed, frictionless bearing. A string wrapped around the cylinderpulls downward with a force F which equals the weight...
- Q A farmer uses a tractor to pull a 190 kg bale of hay up a 15∘incline to the barn at a steady 5.0 km/h. The coefficient ofkinetic friction between the...
- Q What mass of ice at -10.5°C is needed to cool a whale's watertank, holding 1.13 103 m3 of water, from 20.0°C down to a morecomfortable 10.0°C?
- Q a.Laser light comes in to a rectangular block of thick (12 cm) glasswith an incident angle (relative to normal) of 25 degrees. Whatangle does the light have inside and as...
- Q At t = 0, one toy car is set rolling on a straighttrack with initial position 14.0 cm, initial velocity -3 cm/s, andconstant acceleration 2.30 cm/s2. At the same moment,another...
- Q Three moles of an ideal monatomic gas expand at a constantpressure of 2.10 atm ; the volume of the gas changes from 3.30×10−2m3 to 4.50×10−2 m3 .a) Calculate the initial...
- Q Ch 198. A nearsighted person has glasses with a prescription of -6.25D. What is the farthest he can see clearly without correctivelenses (far-point)? 16 cm9. A farsighted person has a...
- Q a boy pulls his 6.35kg sled 5m across a patch of ice where thesled accelerates at a=0.39m/s^2. He pulls the sled by a rope withtension 10.6N at an angle of...
- Q your ear canal has a resonant frequency in the region around3000hz，compute the length of your ear canal with the aboveassumption，and sketch a diagram showing the resonant .make sure the answer...
- Q aworker applies a horizontal force to the top edge of a crate to getit to tip (rotate) forward. if the crate has a mass of 100kg and is1.6m tall and...
- Q a 1.25kg mass on a pring vibrates as simple harmonicoscillator with time dependant position y,y(t)=(0.250m)vos(12.1t)find:a. amplitude im meterb.frequency of oscillation in hertzc.period of osillation in sd.position at t=1.4se.velocity at t=1.4sf.spring...
- Q Explain the steps to obtaining an electric field, magnetic field,electric flux, and magnetic flux.
- Q A simple microscope consists of two lenses. The object is justplaced outside of the focal length of an objective lens with f =5.00 mm. The focal length of the eyepiece...
- Q Neutron stars consist only of neutrons and have unbelievablyhigh densities. A typical mass and radius for a neutron star mightbe 3.7 x 1028 kg and 1.3 x 103 m. (a)...
- Q During the power stroke in a four-stroke automobile engine, thepis-ton is forced down as the mixture of combustion products andair undergoes an adiabatic expansion. Assume (1) the engine isrunning at...
- Q There are plenty of references tothis claim on the internet that tying knots in power cables willprevent a piece of equipment e.g. television or computer from apower surge.How can this...
- Q A rescue plane wants to drop supplies to isolated mountainclimbers on a rocky ridge 235 m below. If the plane is travelinghorizontally with a speed of 189 km/h (52.5 m/s...
- Q A 0.25 kg block slides down a ramp that is 0.6 m tall, 0.8 mlong and has a diagonal length of 1.0 m. The block starts at restand arrives at...
- Q Constant amount of ideal gas is kept inside a cylinder by apiston. The piston is locked in to position, it is not allowed tomove. The gas is then heated up....
- Q On the Apollo 14 mission to the moon, astronaut Alan Shepard hita golf ball with a 6 iron. The acceleration due to gravity on themoon is 1/6 of its value...
- Q A person is pulling on a block with a force of 100N at an angleof 30 degrees with the horizontal (+x direction). If the mass ofthe block is 10kg and...
- Q The balance wheel of a watch oscillates with angular amplitude1.2Ï€ rad and period 0.70 s. Find (a) the maximum angular speed ofthe wheel, (b) the angular speed of the wheel...
- Q Comets travel around the sun in elliptical orbits with largeeccentricities. If a comet has speed 2.5×104 m/s when ata distance of 2.8×1011 m from the center of the sun,what is...
- Q A 2.50-kg grinding wheel is in the form of a solid cylinder ofradius 0.100 m.1- What constant torque will bring it from rest to an angularspeed of 1200 rev/min in...
- Q A group of students perform the same \"Conservation of MechanicalEnergy\" experiment that you performed in lab by allowing a solidsphere and then a solid cylinder to roll down the ramp....
- Q In this assignment , we will explore the life of Isaac Newton,please listen to the radio show from the BBC and do a littleresearch about Isaac Newton.Listen the first episode...
- Q A bicycle wheel can be thought of simply as a centralsolid cylinder (the part that attaches to the axle) surrounded by athin shell of mass (the rim and tire) located...
- Q A 2.7 kg block with a speed of 5.4 m/s collides with a 5.4 kgblock that has a speed of 3.6 m/s in the same direction. After thecollision, the 5.4...
- Q Describe and explain the optics of the microscope and thetelescope.
- Q Can you explain the major concepts needed to launch a satelliteinto space, place it in a particular orbit around the Earth, keepit in that orbit, and eventually dispose of it?
- Q Consider a series of 8flips of a fair coin.Calculate theprobabilities for obtaining 0-8 heads. We will consider each ofthese nine outcomes to be macrostates of the system. Graph theseprobabilities below.ProbabilityNumber...
- Q Extract the radial part of the Schrodinger. wave equation inspherical coordinates for a hydrogen like atom. Use the methods ofeigenvalues. Plot the results with the radial wave function as afunction...
- Q A soccer ball (mass = 0.450 kg, diameter = 0.70 m) is rolleddown a 3.0 m high ramp that makes an angle of 30 degrees with thehorizontal and is 6.0...
- Q How does the physics learned in the classroom compare to physicsin the real world? Provide a detailed response.
- Q List the recommendation of federal, state and local regulationsregarding radiation protection requirements relating to theassignment of personal monitoring devices.
- Q A 3.4 kg box rests on a 17 degree inclined plane. Howmuch of its weight is pulling it down the ramp? How much of itsweight is directed perpendicularly to the...
- Q What does impulse do to an object? How does a large impulseaffect an object differently Than a small one?Use what you said above to answer: What does the presence of...
- Q In Anchorage, collisions of a vehicle with a moose are so commonthat they are referred to with the abbreviation MVC. Suppose a 950kg car slides into a stationary 550 kg...
- Q Use Ge = 9.8 m/s and Gm = Ge/6 for the Earth and Moon’sacceleration of gravity.1. What is the apparent weight (or force on the scale fromtheperson) of this 60...
- Q If a satellite is in a sufficiently low orbit, it will encounterair drag from the earth's atmosphere. Since air drag does negativework (the force of air drag is directed opposite...
- Q A Gaussian surface in the shape of a right circular cylinderwith end caps has a radius of 16.4 cm and a length of 68.1 cm.Through one end there is an...
- Q A doctor examines a mole with a 16.5 cm focal length magnifyingglass held 14.0 cm from the mole.(a) Where is the image? (Enter the image distance in meters.Include the sign...
- Q What is Earth's Specific Mechanical Energy in its orbit aroundthe Sun?Here are some properties you may or may not need to solve thisquestion (you'll have to decide which of these...
- Q The three spheres in the figure, with masses mA = 89 g, mB = 12g, and mC = 17 g, have their centers on a common line, with L =...
- Q If 17.06 mol of helium gas is at 10.1 ∘C and a gauge pressure of0.311 atm .Part ACalculate the volume of the helium gas under theseconditions.Part BCalculate the temperature if...
- Q A television channel is assigned the frequency range from 54 MHzto 60 MHz. A series RLC tuning circuit in a TV receiver resonatesin the middle of this frequency range. The...
- Q A steel tank contains 377 g of ammonia gs (NH3 withmolar mass 17.0 g/mol) at a pressure of 1.33 x 106 and atemperature of 75.0oC. (a) What is thevolume of...
- Q You want to conduct an experiment to understand how the powergenerated by a wind turbine is affected by the speed of the wind.Write your hypothesis (1point) and explain how you...
- Q Len is a 59 kg pole vaulter and he falls from a peak height of5.0 meters after pole-vaulting over the crossbar set at thatheight. He lands on a thick mat...
- Q If i bow a violin string exactly at 1/3rd of the length，whatpartials will be missing ？why do we wrap the strings of a bass or cello？
- Q The volume of some air, assumed to be an ideal gas, in thecylinder of a car engine is 540cm^3 at a pressure of 1.1 x 10^5 Paand a Temperature of...
- Q Rutherford's experiments showed that positive charges in atomsis not uniformly throughout the atom. Describe his experimental setup, results and conclusions
- Q what is wolf tone with respect to string instrumentbehavior？
- Q Due to tides mean sea level off of Newport Beach reaches aheight of 1.3 meters during hightide and 0.3 meters during low tide. Successive high tides occurevery 12 hours (43,200seconds)....
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