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Using reliable sources, write a summary of the concept of energy return on energy invested (EROEI). Provide some estimates of the EROEI for petroleum extraction from tar sands. Please also report on the EROEI of shale natural gas.
A gas is compressed at a constant pressure of 0.800 atm from9.00 L to 2.00 L. In the process,400 J of energy leaves the gas by heat. What would be the change in its internal energy
A 2.0 cm tall object is placed 5.0 cm in front of a +12 diopter lens. What is the linear magnification
A 1300-kg car moving on a horizontal surface has speed v = 55km/h when it strikes a horizontal coiled spring, What is the spring stiffness constant of the spring
A Satellite circles planet Zeron every 98 minutes. The mass of the planet Zeron is known to be 5.0x 10 24 kg. What is the radius of the orbit of the satellite
The leg and cast weigh 200 N, with the center of mass as indicated by the blue arrow. The counterbalance w1 weighs 110 N. find out the weight w2 and the angle α needed so that no force is exerted on the hip joint by the leg plus cast.
A current given by I(t)=3t^3 where I is in amps when t is in seconds, passes through a 5- resistor. How much energy is dissipated as heat between t=3 s and t=5 s
A cannonball is dropped from the top of a building. If the point of release is 44.8 m above the ground, what is the speed of the cannonball
In photo like the Hubble Deep Field, we see galaxies in many different stages of their lives. In general, which galaxies are seen in the earliest (youngest) stages of their lives.
You are driving north on 107th Avenue at a speed of 28.7 mph. At what frequency do you year the siren
a satellite has a moment of inertia of I=8000 kgm^2 and rotates at 3 rev per min. what will be the rate of rotation after the panels has been deployed
When a 0.213-kg mass is attached to a vertical spring it causes the spring to stretch a distance d. Find the stretch distance, d
Ships A and B leave port together. For the next two hours, What is the distance between the two ships two hours after they depart
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