Physics

The rate of flow of heat through different materials of the same thickness is different. Plan and design an experiment to test this statement based on the rate of flow of heat
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a flyewheel has a diameter of 1.72 m and a mass of 902 kg. what torque in newtons is needed to produce and angular acceleration of 100 rpm/s
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an isotonic contraction is one that involves a change in length but not a change in tension. true or false
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g a bird has a mass of 26 g and perches in the middle of a stretched telephone line. determine the tension when
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calculate the magnitude of the magnetic field at a point 58.0 cm from a long, thin conductor carrying a current of 4.70 a.
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Suppose the angles shown in Fig. 5.31 are 52 and 25. If the left-hand mass is 2.5 kg, what should the right-hand mass be so that it accelerates (a) downslope at 0.64 m/s2 and (b) upslope at 0.76 m/s2?
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when a mass m is hung on a certain ideal spring, the spring stretches a distance d. if the mass is then set oscillating on the spring, the period of oscillation is proportional to
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a wire with a current of 4 amps is in a magnetic field of 2 tesla. the magnetic field is oriented perpendicular to the wire. what is the magnitude of the force per unit length on the wire?
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a small bok globule has a diameter of 20 seconds of arc. if the nebula is 1000 pc from earth, what is the diameter of the globule?
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which is greater: an acceleration from 25 km/h to 30 km/h or from 96 km/h to 100 km/h, both occurring during the same time?
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you are snowboarding down a hill at 19 m/s when you start sliding across a frozen lake. the frictional force slowing you down is 22 n . if your mass is 65 kg , how far do you slide?
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Hodan carried a box of (5,4)m. The box had a mass of 5kg. Hodan said that over 300J of work was done on the box. Is she correct, explain your answer
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if latosha needs to apply a force of 71 n to move the object along the ramp, what is the length of the ramp?
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identifying voxels in an fmri scan that light up when a person sees a photo of a particular scene for the first time is an example of .
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a rising parcel of unstable air a rising parcel of unstable air can rise well into the mesosphere. cannot rise very far above the tropopause. can eventually escape into space. will not be slowed by entrainment.
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a 12- cm -long spring is attached to the ceiling. when a 2.2 kg mass is hung from it, the spring stretches to a length of 18 cm (a) What is the spring constant k?
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calculate the amount of heat removed from a fermenter within 24 hours. assuming rate of cooling is 50 btu/hr.m2.f. the size of heat exchange surface is 10 m by 8 m. the temperature difference is 20f
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what statement on convection is wrong? select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a cooler, denser, heavier air sinks downward. b ascending warm air expands, cooling until it becomes denser than surrounding air and sinks back to the ground. c cooler air, now in contact with the ground, is warmer and rises, having been displayed by cooler, dense air. d warm air usually goes down and cooler air goes up.
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What is the direction and magnitude of the Electric Field 4.0 m away from an 8.6 C charge?
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when you switch off the lights in your room at night, the walls, ceiling, and floor are at a temperature of about 300 k. why are you not dazzled by the radiation that they emit?
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when the speed (assumed to be much less than the speed of light) of a particle doubles, its momentum doubles, and its kinetic energy becomes four times greater. when the momentum of a photon doubles, does its energy become four times greater? provide a reason for your answer. cj7 29.cq.009
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the intensity of a sound wave at a fixed distance from a speaker vibrating at 1.4 khz is 0.683 w/m 2 . determine the intensity if the frequency is increased to 2.57 khz while a constant displacement amplitude is maintained. answer in units of w/m 2 .
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this solenoid must be 1.40 m long and 20.0 cm in diameter. if you have 2513.3 m of wire, how many turns of wire can you include in your solenoid?
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if the length and diameter of a wire of circular cross section are both tripled, the resistance will be
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