6. an unknown material has a normal melting/freezing point of 225.0 °c, and the liquid
phase has a specific heat capacity of 160 j/(kg? cº). one-tenth of a kilogram of the solid
at 225.0 c is put into a 0.150-kg aluminum calorimeter cup that contains 0.100 kg ot
glycerin. the temperature of the cup and the glycerin is initially 27.0 °c. all the
unknown material melts, and the final temperature at equilibrium is 20.0 °c. the
calorimeter neither loses energy to nor gains energy from the external environment.
what is the latent heat of fusion of the unknown material?
(5)

The precision of a laboratory instrument is ± 0.05 g. the accepted value for your measurement is 7.92 g. which measurements are in the accepted range? check all that apply. 7.85 g 7.89 g 7.91 g 7.97 g 7.99 g

The heliocentric and the geocentric models of the solar system included these central principles

Acommon technique in analysis of scientific data is normalization. the purpose of normalizing data is to eliminate irrelevant constants that can obscure the salient features of the data. the goal of this experiment is to test the hypothesis that the flux of light decreases as the square of the distance from the source. in this case, the absolute value of the voltage measured by the photometer is irrelevant; only the relative value conveys useful information. suppose that in part 2.2.2 of the experiment, students obtain a signal value of 162 mv at a distance of 4 cm and a value of 86 mv at a distance of 5.7 cm. normalize the students' data to the value obtained at 4 cm. (divide the signal value by 162.) then calculate the theoretically expected (normalized) value at 5.7 cm.