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An ideal heat engine with a Carnot efficiency of 38.9 % takes in heat from a high-temperature reservoir at 155oC. What is the Celsius temperature of the low-temperature reservoir?
A 10m uniform beam of weight 100 N is supported by two ropes at the ends. If a 400N person sits at 2.0 m from the left end of the beam, what is the tension in the left rope?
A block of mass 1.00kg slides along a horizontal table with speed V0 = 2.50m/s. How far did the spring compress when the block first momentary comes to rest
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of 2 protons and 2 neutrons).
If the index of refractions of the red light is 1.4925, what is the index of refraction of the blue light?
question1analyse the crystal thickness pd df prf prp spl period and distance to reflector if a 3 cycle pulse emitted
In a billiard ball collision, a .5 kg cue ball, hits the .5 kg eight-ball with a velocity of .39 m/s. What is the velocity of the eight ball after the collision
a single mass m1 3.6 kg hangs from a spring in a motionless elevator. the spring constant is k 294.0 nm. now three
A clean copper surface is exposed to light of wavelength 275 nm. What is the maximum speed of the photoelectrons emitted from this surface? Use the table below copper=4.7eV.
You are trying to overhear a juicy conversation, but from your distance of 24.0m , it sounds like only an average whisper of 40.0dB. How close should you come
a spelunker is surveying a cave. she follows a passage that takes her a distance 173 straight west then a distance 200
Two trains are traveling towards each other on parallel tracks that run diagonally Northeast to Southwest and vice versa. train A (proper length L) travels southwest to northeast and train B (proper length 2L) travels northeast to southwest.
What linear speed must a 4.5×10?2 hula hoop have if its total kinetic energy is to be 0.15 ? Assume the hoop rolls on the ground without slipping.
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