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A carnot cycle operates between source and sink temperatures of 250c and -15C. If the system receives 90 kj from the source, find:
(a) Efficiency of the system
(b) The net work transfer
(c) Heat rejected to sink
A planet of mass m = 1.35 × 10^24 kg is orbiting in a circular path a star of mass M = 7.35 × 10^29 kg. What is the orbital period (in earth days) of the planet Tplanet
The potential difference across a resting neuron in the human body is about 70 mV, How much power does the neuron release
If the spring constant k = 5.0\times 10^2 \rm \;{N/m}, the baby has a mass m = 11\;{\rm kg}, and the baby's legs reach a distance d = 0.15\; \rm m from the bouncer, what should be the height h of the "empty" bouncer above the floor?
Calculate the linear acceleration of a car, the 0.310 m radius tires of which have an angular acceleration of 15.0 rad/s2. Assume no slippage. What is the final velocity of the car
q1. an aluminum cup contains 225 g of water and a 40-g copper stirrer all at 27degc. a 400-g sample of silver at an
a simple harmonic oscillator begins its motion from maximum positive displacement when a certain clock reads t0.00s.the
A flat circle of radius 17 cm is placed in a uniform electric field of magnitude 6.2 102 N/C. What is the electric flux through the circle when its face is perpendicular to the field lines
The nearby town of Bellefonte, PA features the Gamble Mill, an old mill originally used to grind grain into flour - 1800s hydropower. At $0.07 per kWh, what is this energy worth per day
An ideal gas at 0 degrees Celsius consists of 1.0x10^23 atoms. 16J of thermal energy are added to the gas. What is the new temperature in Degrees Celsius
An engine absorbs 1.68 kJ from a hot reservoir at 277°C and expels 1.23 kJ to a cold reservoir at 27°C in each cycle. How much work is done by the engine in each cycle
An electric current of 200 mA is maintained for 3 sec in a 20-ohm resistor. The temperature of the resistor remains constant at 25 C. What is the change in the entropy of the resistor?
A photon having 27 keV scatters from a free electron at rest. What is the maximum energy that the electron can obtain
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