Physics question and answers for October 02, 2023
- Q light travels from air through two layers with index ofrefraction n1 and n2, respectively. If upon entering each layerlight loses 10% of its velosity, what is the index of refractionn2
- Q How much heat is required to change a 30.2 g ice cubefrom ice at -13.8°C to water at 23°C? (if necessary, usecice=2090 J/kg°C and csteam= 2010 J/kg°C)How much heat is...
- Q 3.) To maintain a constant speed, the force provided by a car'sengine must equal the drag force plus the force of friction of theroad (the rolling resistance). Assume all values...
- Q Which of the following best indicates the components of a vectorthat measures 30 m at 135°?a)<21, 21> mb)<-21, 21> mc)<21, -21> md)<-21, -21> mA student runs off of a diving...
- Q A proton has an initial velocity of 7.6 × 106 m/s in thehorizontal direction. It enters a uniform electric field of 8800N/C directed vertically.a) Ignoring gravitational effects, find the time...
- Q An electron starts from rest 27.0 cm from a fixed point chargewith Q = -8.00 nC .How fast will the electron be moving when it is very faraway?------------------Many chemical reactions...
- Q Robert Millikan is famous for his experiment which demonstratedthat electric charge is discrete, or quantized. His experimentinvolved measuring the terminal velocities of tiny charged drops ofoil in air between two...
- Q A ball is thrown straight up from the edge of the roof of abuilding. A second ball is dropped from the roof a time of 1.20 slater. You may ignore...
- Q Krissy throws a ball from a height of 2.00 m above the ground.She throws the ball with a speed of 3.00 m/s directed 50.0 degreesabove the horizontal. Find: a.) the...
- Q ) (Take eastward as the positive direction) Zachary, who is arunner, runs 8.30m/s westward for 12.0s. Zachary then turns aroundand runs 50.0m eastward toward the starting point in 30.0s. What...
- Q There are many natural occurring radioactive isotopes. Amongthem, Radon(222Rn), 40K and 14C are the most important ones.a) Where are/ were these isotopes produced and come from? Youcan consult Wikipedia for...
- Q A tugboat tows a ship with a constant force of magnitudeF1. The increase in the ship's speed during a10 s interval is 4 km/h. When a second tugboat applies anadditional...
- Q Four identical bowling balls are placed on the corners of asquare drawn on the ground whose sides are each .2 meters long. Ifthe mass of each ball is 4kg, a)What...
- Q Compute the total quantity of heat (both in Kcal and J) requiredto raise the temperature of 1.00 kg of ice at -10.0 degrees C to1.00 kg of steam at 110.0...
- Q A non-conducting sphere of radius R centered at O contains aspherical cavity of radius R’ centered at O'. Let d be thedisplacement of O’relative to 0. Throughout the sphere, there...
- Q An object is thrown vertically upward with an initial speed of56.9 m/s. (Assume the object is thrown from ground level.)(a) How high (in m) does it rise?(b) How long (in...
- Q The following multipart problem asks you to derive a number ofcharacteristics of an extrasolar planetary system. Assume that theplanet has been detected by Kepler with the transit method, andthat the...
- Q two masses m1 = 4.70 kg and m2 which has a mass 50.0% that ofm1, are attached to a cord of negligible mass which passes over africtionless pulley also of...
- Q A hockey puck is given an initial velocity of 39.6 m/s along theice. Find the speed of the puck 1.08 s later if the coefficient ofkinetic friction between puck and...
- Q In what ways did Galileo' observations of Venus and Jupiterconflict with the prevailing view at the time?
- Q A cylinder with a piston contains 0.300 mol of oxygen at2.00×105 Pa and 340 K . The oxygen may be treated as anideal gas. The gas first expands isobarically to...
- Q A bicycle wheel is rotating at 41 rpm when the cyclist begins topedal harder, giving the wheel a constant angular acceleration of0.50 rad/s2What is the wheel's angular velocity, in rpm,...
- Q Problem 26.49: Resolution of the eye, I.Even if the lenses of our eyes functioned perfectly, our visionwould still be limited due to diffraction of light at thepupil.Part AUsing Rayleigh's criterion,...
- Q a block of mass 2.4 kg is sitting on a frictionless ramp with aspring at the bottom that has a spring constant of 490N/m the angleof the ramp with respect...
- Q 4 Neutron interactions within nuclear power systems.a) Explain with quantification the terms ‘thermal’ and ‘fast’ todescribe neutrons.b) Describe fully three important neutron interactions in athermal nuclear power reactor.c) Describe the...
- Q The average resistivity of the human body (apart from surfaceresistance of the skin) is about 5.0 Ω⋅mΩ⋅m. The conducting pathbetween the right and left hands can be approximated as a...
- Q If there was no energy generated in the solar interior the coreof the Sun would ...Question 1 options:Contract and cool downContract and heat upExpand and cool downExpand and heat upQuestion...
- Q Gayle runs at a speed of 3.30 m/s and dives on a sled, initiallyat rest on the top of a frictionless snow-covered hill. After shehas descended a vertical distance of...
- Q What kind of batteries are least expensive? Are there newdevelopments in batteries that will bring down the cost? Willbatteries be a useful way to store intermittent electricity, suchas electricity generated...
- Q Define astronomical ephemeris in your own words.Describe how Mars moved across the sky in 2005.
- Q Determine the area of a flat piece of metal according to thedata in the table below. The answer will need to be correctlystated as: (mean value ± σm) units. Forexample:...
- Q Comparison of electric & gravity forces: Two identicalblocks are placed 5 m apart. Each has a mass of 2 kg, iselectrically neutral, and is made entirely of copper. Note: Onecopper...
- Q A place-kicker must kick a football from a point 36.0 m (about40 yards) from the goal. Half the crowd hopes the ball will clearthe crossbar, which is 3.05 m high....
- Q Water standing in the open at 34.5°C evaporates because of theescape of some of the surface molecules. The heat of vaporization(553 cal/g) is approximately equal to εn, where εis the...
- Q A spherical conductor has a radius of 14.0 cm and a charge of26.0 µC.Calculate the electric field and theelectric potential at:(a) r = 10.0 cm,(b) r = 20.0 cm,(c) r...
- Q A contestant in a winter games event pushes a 46.0 kg block ofice across a frozen lake as shown in the figure below. Thecoefficient of static friction is 0.1 and...
- Q The ammonia molecule NH3 has a permanent electricdipole moment equal to 1.47 D, where 1 D = 1 debye unit = 3.34 ×10-30 C-m. Calculate the electric potential in volts...
- Q Answer following questions:a) Explain the difference between an isotropic material and ananisotropic material. Give one example of abiological materialother than bone that is anisotropic and explain how it isanisotropic.b) It...
- Q An object 9.0 cm tall is 45 cm in front of a convex mirror witha radius of curvature of 45 cm.A) Where is the image? distanceB) How big is it?C)...
- Q Ball Thrown upward with an initial speed of 14.7m/s from aheight of 89ma)Draw the sketch of this motionb) State the theory that describes this motionc) Write the velocity and position...
- Q A uniform electric field of magnitude 240 V/m is directed in thepositive x direction. A +13.0 µC charge moves from the origin tothe point (x, y) = (20.0 cm, 50.0...
- Q 1. Typical household currents are on the order of a fewamperes.a. If a 1.54A current flows through the leads of an electricalappliance, how many electrons per second pass through it?b....
- Q How is thunder and lightning made, and what causes it?
- Q Everyone knows that an earthquake is the shaking of the ground.Describe the ways in which it acts like a wave. How can the S and Pwaves be used to determine...
- Q The lightbulb has a different dynamic resistance depending onwhether the voltage is increasing or decreasing. Explain why thedynamic resistance is different under these two conditions.
- Q Two small nonconducting spheres have a total charge of Q=Q1+Q2=90.0 μC , Q1<Q2. When placed 31.0 cm apart, the force eachexerts on the other is 13.0 N and is repulsive.Part...
- Q A tourist is driving a car along a straight road at a constantspeed of 22.5 m/s. Just as she passes a law officer parked alongthe side of the road, the...
- Q A long wire carrying a 5.8 A current perpendicular to thexy-plane intersects the x-axis at x=−1.7cm. A second, parallel wirecarrying a 2.0 A current intersects the x-axis at x=+1.7cm. A....
- Q Two charges are placed on the x axis. One of the charges (q1 =+6.23C) is at x1 = +3.00 cm and the other (q2 = -29.4C) is at x2 =+9.00...
- Q 2 kg of iron ingot at 1100oC is mixed with 1 kg ofwater at -20oC. Once the thermal equilibrium is reached,what would be the final state of water? Be as...
- Q Mount Alberta in Jasper National Park, Alberta, has an elevationof 3620 m above sea level. Determine the atmospheric pressure atthe top of Mount Alberta, assuming a sea level pressure of...
- Q A small block with mass 0.0400 kg is moving in thexy-plane. The net force on the block is described by thepotential- energy function U(x,y)= (5.90 J/m2 )x2-(3.50 J/m3)y3.A)What is the...
- Q A fireworks rocket is launched vertically upward at 40m/s.At the peak of its trajectory, it explodes into two equal-massfragments. One reaches the ground t1 = 2.63safter the explosion. When does...
- Q A manufacturing plant uses 2.49 kW of electric power provided bya 60.0 Hz ac generator with an rms voltage of 470 V . The plantuses this power to run a...
- Q Given a 2.00 μF capacitor, a 5.00 μFcapacitor, and a 6.50 V battery, find the charge on each capacitorif you connect them in the following ways.(a) in series across the...
- Q If you have a cube of air exactly 1 cubic meter in volume at25°C and atmospheric pressure,How much does it weigh (absolute weight, don’t worry aboutimpact of surrounding air) in...
- Q The figure shows an initially stationary block of massm on a floor. A force of magnitude 0.500mg isthen applied at upward angle ? = 20
- Q The lob in tennis is an effective tactic when your opponent isnear the net. It consists of lofting the ball over his head,forcing him to move quickly away from the...
- Q Construct a capacitor by filling a paper cup with water. Whatis the analog of voltage in this case, and what is thecapacitance?Poke a small hole on the side of the...
- Q A person standing on the ground is holding a spinning bicyclewheel. he reaches up and causes it to stop. Draw an angularmomentum bar chart for the system of the person...
- Q A parallel-plate capacitor has capacitance 8.00 μF. (a) How muchenergy is stored in the capacitor if it is connected to a 13.00-Vbattery? μJ (b) If the battery is disconnected and...
- Q A 1.78-kg block slides with a speed of 0.955 m/s on africtionless horizontal surface until it encounters a spring with aforce constant of 660 N/m. The block comes to rest...
- Q You wire a real battery to a R1 = 42 Ω resistor and find thatthe output voltage between its terminals is V1 = 8.6 V. Youdisconnect it from the first...
- Q A block weighing 82.5 N rests on a plane inclined at 28.8° tothe horizontal. The coefficient of the static and kinetic frictionsare 0.25 and 0.12 respectively. What is the minimum...
- Q A charge of -3.30 nC is placed at the origin of an xy-coordinate system, and a charge of 1.55 nC is placed on they axis at y = 4.30 cm...
- Q Sam, whose mass is 75kg , takes off across level snow on hisjet-powered skis. The skis have a thrust of 220N and a coefficientof kinetic friction on snow of 0.1....
- Q Each part of this question covers a key concept. Each requiresat most a few sentences to answer; some are much shorter. Please beconcise.(a) What does the Maxwell-Boltzmann distribution describe for...
- Q The sun is 150,000,000 km from earth; its diameter is 1,400,000km.For a science project on solar power, a student uses a24-cm-diameter converging mirror with a focal length of 47 cm...
- Q How do you calculate the time required to change the temperatureof a room by 10C by radiation? Given: Emissivity: 0.91 A: 2.0 T2:292.5K T1:282.4KI just need to know what formula...
- Q Engine Cyclesa. Write a description of an 'engine cycle'. Use figures, grabsand/or image to help support your description. Cite and materialthat used to prepare this description.b. Provide a real world...
- Q Would the voltage of a battery in circuit be larger or smallerthan the voltage of a battery out of circuit? Why?
- Q A Ferris wheel with a diameter of 35.0 m in , starts from restand achieves its maximum operational tangential speed of 2.20 m/sin a time of 15.0 s. a.) what...
- Q A proton moving to the right at 6.2 × 10^5 ms^-1 enters a regionwhere there is an electric field of 62 kNC^-1 directed to the left.Describe qualitatively the motion of...
- Q Howcan I differentiate between QH and QL in the refrigerator case inthe second law of thermodynamics?
- Q In the vertices of a square of side 2x10 ^ -7 fourprotons are placed. A fifth proton is initially perpendicular tothe square at its center at a distance of 2x10...
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