Asample of an unknown substance has a mass of 89.5 g. if 345.2 j of heat are required to heat the substance from 285 k to 305 k, what is the specific heat of the substance?

j/g•k

Heat gained in a system can be calculated by multiplying the given mass to the specific heat capacity of the substance and the temperature difference. It is expressed as follows:

Heat = mC(T2-T1)
345.2 = 89.5(C)(305 - 285)
C = 0.1928 J/g•K

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000