By László Holics
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Additional resources for 300 Creative Physics Problems with Solutions
An analyt ica l ba lance is used with brass weig hts. Find the mass of a body made of Ple xiglas , whose two measurements result in a din"erence of at least one mark if one measurement is performed in dry weather and the other in wet weather') In both cases the room temperature is 23 ° C and the atmospheric pressure is lO G Pa . In wet weather the pressure of the water vapour in the air is 2 ·10:3 P a . 1 mg/scalcl1Iark. 1 8·10:3 kg / m: ) Problem 154. The two e nds of a homogeneous chain of mass 2 kg are fixed to columns of height 1 m as shown in the figure.
Ss ure of th e ickal gas in statc 3') 1X.. .. 1L ...... 1 I i i T(K) I I I I I I T4 .. Tl Prohlem 173. :. : plane o f the graph ( II:T ) is a ri ght trian g le w ith kg s parallel to th e II anu T axeS. j c11ll : . : 12 dill :; . 3? o T Prohlem 174. :rcury. :n. : 2 CIll :! :d down by 10 CIIl . : pi ston. :rcury . Prohlem 175. :. :rcury . : igh t of merc ury. :ach bra nch') 16 em E u N I/) E u ~ Prohlem 176. 2 C1ll 2 . :nd fac in g upward s. :rc ury. :r). :rlcd '? 7 g/e ll! : Ill o lar Ill ass is 74.
A closed container ~ 2·10 3 2 ------------ --- i~ : ------~L, ,,1 : ' : conta ins diatom ic gas at temperature 300 600 T(K ) TI and pressure Pl. The gas is then heated to temperature T 2 , during which 20% of the molec ul es are broken into ato ms. a) F ind the final pressure of the gas. b) Find the ratio of the final and initial internal e nergies of the gas. ) Problem 194. I mo l of He is enclosed by a piston in a heatable and coo lable container at an initi al volume of 30 clm 3 and an initi al temperature of 5 °C .