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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).]
Explain the physical processes by which astronomers are able to estimate the temperature of a gas by observing which spectral lines are present in its spectrum and measuring the relative strength of the lines. This process is known as Balmer thermome..
A hiker's trip consists of three segments. Path A is 8.0 km long heading 60degrees north of east. Path B is 7.0km long in a direction due east. Path C is 4.0 km long heading 315 degrees counter clockwise from east.
A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate, What is the coefficient of kinetic friction between the ramp and the crate
A fire truck siren produces a steady single tone of frequency 500 Hz when at rest. When the fire truck is at rest
suppose a speck of dust in an electrostatic precipitator has 1.0000x1012 protons in it and has a net charge of -5.00nc
Object A has a mass of mA = 16.8 kg and an initial velocity of = 8.97 m/s, due east. Object B, however, has a mass of mB = 28.8 kg and an initial velocity of = 4.15 m/s, due north.
Here's a basketball problem: A 75.0 kg basketball player is running in the positive direction at 8.2 m/s. what is the resulting velocity of the 75.0 kg player
A wooden raft has a mass of 85 kg. while empty it floats in water (density 1000 kg/m3) with 61 percent of its volume submerged. What mass of sand can be put on the raft without it sinking.
An AC power generator produces 46 A (rms) at 3600 V. The voltage is stepped up to 100000 V by an ideal transformer, and the energy is transmitted through a long-distance power line that has a resistance of 100 . What propotion of the power deliver..
Consider a black body of surface area 28.0 cm2 and temperature 5600 K. How much power does it radiate
A solid wood door 1.00 m wide and 2.00 m hight is hinged alone one side and has a total mass of 40.0 kg, whats the final angular speed of the door
An athlete catches a ball traveling at 20 m/s with her hands. Between the time she makes contact with the ball and the time the ball stops moving, What is the mass in kg of the ball
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