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Steam can cause more serious burns than water at the same temperature. Here we want to examine this effect quantitatively, noting that flesh becomes badly damaged when its temperature reaches 50.0 oC. (a) Calculate the heat released at 12.5 g of liquid water at 100 oC is cooled to 50.0 oC. (b) Calculate the heat released when 12.5 g of steam at 100 oC is condensed and cooled to 50.0 oC. (c) Find the mass of fresh that can heat from 37 oC (normal body temperature) to 50.0 oC for the cases considered in parts (a) and (b). [The average specific heat of flesh is 3,500 J/(kg K).]
An electron is accelerated from rest through a potential difference that has a magnitude of1.65 107 V. what is the relativistic kinetic energy (in joules) of the electron
What is an average speed
Two small plastic spheres are given positive electrical charges. When they are 17.0{\rm cm} apart, the repulsive force between them has magnitude 0.200{\rm N} . 1.What is the charge on each sphere if the two charges are equal? 2.What is the charge..
You push with a horizontal force of 50.0N against a 24.0N box, pressing it against a rough wall to hold it in place. what is the friction force of the box
A car of mass 1500kg is driving across a flat parking lot (u=0.3), How fast can the turn be made without causing the car to slide
A heat engine operates between a reservoir at 28°C and one at 354°C. What is the maximum efficiency possible for this engine
A particular spring has a force constant of 2.8×103N/m, How much work is done in stretching the relaxed spring by 7.0cm
A 53.6-kg skateboarder starts out with a speed of 2.49 m/s. He does 114 J of work on himself by pushing with his feet against the ground. How much has the vertical height of the skater changed
A narrow flat coil wound on a square frame has 120 turns and sides of 21.5 cm. What is the maximum torque that can be exerted by the field on the coil
A 0.14 kg baseball moves horizontally with a speed of 27 m/s toward a bat. find magnitude of the impulse delivered to the ball by the bat
A helicopter has blades of length 6 m, rotating at 4.1 rev/s about a central hub. If the vertical component of Earth's magnetic field is 4.5×10?5 T, FIND the maximum emf induced in the coil by Earth's magnetic field
consider an electron with an initial speed v0 = 32 Mm/s (1 Mm = 1 megameter = 1000 km = 1E6 m), What distance d (in m) will the electron travel before it stops
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