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Waly Whacko claims to have invented a heat engine that will revolutionize industry. It runs between a hot source at 300oC and a cold sink at 25oC. He claims that his engine is 92%
(a) What error did he made in his choice of temperature scale? And
(b) What is the actual maximum efficiency of his engine?
q1. a mass-spring system oscillates on a horizontal frictionless surface with amplitude of 3.89 cm. if the spring
An unstable particle with a mass equal to 3.34 ? 10-27 kg is initially at rest. The particle decays into two fragments that fly off with velocities of 0.988c and -0.865c, respectively. Find the masses of the fragments
A 10.0-ohms resistor, a 10.0-mh inductor, and a 100 uF capacitor are connected in series to 50.0-V (rms) having variable frequency. find the energy delivered to the circuit during one period
A transformer with 410 turns in its primary coil and 34 turns in its secondary coil is designed to deliver an average power of 1300 W with a maximum voltage of 60 V
A chair of weight 74.0 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 47.0 N directed at an angle of 41.0^circ below the horizontal and the chair slides along floor.
Assume a neuron in the brain carries a current of. Treating the neuron as a straight wire, what is the magnetic field it produces at a distance of 7.50.
A car slams on its brakes and skids 50m before coming to a stop. If the coefficient of kinetic friction is 0.65 how fast was the car initially going
Find out the magnitude of angular acceleration of the wheel
With what velocity would they be separating after the collision.
Objects A and B are both positively charged. Both have a mass of 118 g, but A has twice the charge of B. How large is the force on A
a diver runs horizontally with a speed of 1.2 m/s off a platform that is 5.0 m above the water. What is the speed just before striking the water
A rocket is launched at an angle of 59.0° above the horizontal with an initial speed of 104 m/s. Find the maximum altitude reached by the rocket
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