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An ideal Carnot engine operates among 455C and 130C with a heat input of 240J per cycle. How much heat is delivered to the cold reservoir in each cycle? What minimum number of cycles are necessary for the engine to lift a rock of mass 430 kg during a height of 115m ?
an 80 kg person in outer space is at rest when he catches a 10 kg asteroid moving at 15ms. what is the final velocity
A planet of mass 7*10^24 is at location m A star of mass 8*10^30 is at location m. What is the force exerted on the planet by the star ?
A gasoline engine by an efficiency of 0.40 generates 1800 W of power. If a liter of gasoline has an energy content of 3.7 × 107 J, how many liters of gasoline does the engine consume every hour?
An atomic nucleus of mass m traveling withthe speed v collides elastically with a target particle of 3m(initially at rest) and is scattered at 90 degrees. What are the final speeds of the two particles
A 1.20 kg pendulum bob is raised 0.340 mabove its lowest point and released. What is the gravitational potential energy of the pendulum bob initially
In 1990 Walter Arfeuille of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth. How much work did Arfeuille do on the object
a converging lens forms an image of an 8.00-rnm-tall real object. the image is 12.0cm to the left of the lens 3.40cm
A person lifts a 950N box by pushing it up an incline. If the person exerts a force of 350N along the incline, what is the mechanical advantage of incline.
A model of a helicopter rotor has four blades, each3.10 m in length from the centralshaft to the blade tip. What is the linear speed of the blade tip
A 740 gram grinding wheel 21.5 cm in diameter is in the shape of a uniform solid disk. What torque does friction exert while the wheel is slowing down
A uniform, solid metal disk of mass 6.90 and diameter 26.0 hangs in a horizontal plane, supported at its center by a vertical metal wire. What is the torsion constant for the metal wire
A sonar device makes a soundwave in the air with a frequency of f1 = 61 Hz. What is the frequency of the sound wave created
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