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Suppose a heat engine has an efficiency of 0.201 and produces 1.09×104 J of work. How much energy is pulled in from the hot reservoir? How much energy is rejected by the engine? (This energy is "exhausted" to the cold reservoir.))
which you analyze late adulthood and the death of an individual as a culmination of the life span developmental
An ac generator has a maximum potential difference output of 155V. find the rms potential difference output
q1. metal rod is 41.126 long at 23.0 and 41.149 long at 46.4 calculate the average coefficient of linear expansion of
You are piloting a spacecraft whose total mass is 1130 kg and attempting to dock with a space station in deep space. What is the initial thrust exerted on your spacecraft by the retro-rocket? What is the thrust's direction (positive if in the direc..
A 3.0 m organ pipe is open at both ends and contains air. The velocity of sound in air is 331 m/s. What is the wavelength of the lowest frequency mode in m
A catcher catches a 145 g baseball traveling horizontally at 38.0 m/s. How large an impulse does the ball give to the catcher
If a mass m_a = 2m has intial velocity 4m/s and mass m_b = m is initially at rest, they undergo elastic collision. Calculate their final velocities after the collision
In the 1950s, an experimental train that had a mass of 25000 kg was powered across a level track by a jet engine that produced a thrust of 500000 N for a distance of 500 m. What would be the speed of the train after this distance
The linear coefficient of thermal expansion for concrete is 12x10^-6 ºC^-1. Consider a slab of concrete which is 4.0 m long at 0.0 ºC. What seems to be the primary safety concern in the lab
A student sits on a rotating stool holding two 4.0-kg objects. When his arms are extended horizontally, Find the new angular speed of the student
you have encouraged your little sister, who has just gotten glasses for her severe near-sightedness, to give you those glasses so you can play with them. If your sister's face is 180. mm-tall, how tall will it appear to be in the image (in mm)
A person is pushing a uniformly-loaded 24.15 kg wheelbarrow along a plank that makes an angle ? = 38.0° with the horizontal. What is the total force the person must apply
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