Физика-8кл-Перышкин-2001-гдз (8 класс - Перышкин), страница 10

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Q1 = mc(t – t1]^_k ²l_ieh_fdhklv\h^u>`⋅ ƒK ±ƒK >`d] ⋅ °K>`Q1 d]⋅ 4200⋅ ƒK ±ƒK >`d] ⋅ °KFu \b^bf qlh Q ≠ Q1 ohly wlb agZq_gby ^hklZlhqgh [ebadb Wlh y\e_gb_Q d]⋅ 4200k\yaZgh k l_f qlh \k_]^Z bf__l f_klh g_ lhevdh l_iehh[f_g f_`^m ^\mfyihjpbyfb\h^u\ dZehjbf_lj_ghb khdjm`Zxs_ckj_^hc59EZ[hjZlhjgZyjZ[hlZBaf_j_gb_m^_evghcl_ieh_fdhklbl\_j^h]hl_eZP_evjZ[hluhij_^_eblvm^_evgmxl_ieh_fdhklvf_lZeebq_kdh]hpbebg^jZM^_evghc l_ieh_fdhklvx \_s_kl\Z gZau\Z_lky lZdh_ dhebq_kl\h l_iehludhlhjh_gm`ghkhh[sblvl_embawlh]h\_s_kl\ZfZkkhcd]^eygZ]j_\ZgbygZ ƒK < jZ[hl_ bkihevam_lky Zexfbgbc b \h^Z L_ieh_fdhklv Zexfbgbyk2 = 920>`>` \h^u k1 = 4200 Wlh ^Zggu_ ba lZ[ebpu JZkq_lud] ⋅ °Kd] ⋅ °K[m^_fijh\h^blvih\u\_^_gghc\ hibkZgbbjZ[hlunhjfme_c2 =c1m1(t-t1 ).m2(t 2 -t)Ijbf_j\uiheg_gbyjZ[hlu.m1d]0,1t1, °C20m2d]0,16t2, °C80<uqbke_gby.>`⋅ 0,1 d] ⋅ (35°K - 20°K4200>`d]⋅ °Kc2 == 875.d] ⋅ °K0,16 d] ⋅ (80°K - 35°Kt, °C35Wdki_jbf_glZevgh ihemq_ggh_ agZq_gb_ g_kdhevdh f_gvr_ ba\_klgh]h balZ[ebpWlhk\yaZghk g_\ukhdhclhqghklvxrdhevguoijb[hjh\Z lZd `_l_fqlhl_iehh[f_gijhbkoh^blb khdjm`Zxsbf\ha^mohfEZ[hjZlhjgZyjZ[hlZK[hjdZwe_dljbq_kdhcp_ibb baf_j_gb_kbeulhdZ\ __jZaebqguomqZkldZoP_ev jZ[hlu m[_^blvky gZ hiul_ qlh kbeZ lhdZ \ jZaebqguo ihke_^h\Zl_evghkh_^bg_gguomqZkldZop_ibh^bgZdh\ZIjb ihke_^h\Zl_evghf kh_^bg_gbb ijh\h^gbdh\ kbeZ lhdZ \ ex[hc lhqd_p_ibh^bgZdh\ZWlhagZqblqlh \ kemqZyo Z [ b \ gZr_c eZ[hjZlhjghcjZ[hlukbeZlhdZI [m^_lihklhyggZIjh\_jbfwlhgZhiul_Ijbf_j\uiheg_gbyjZ[hlu.[ I :Z I :$$60\ I :$Fu ^_ckl\bl_evgh wdki_jbf_glZevgh m[_^bebkv qlh kbeZ lhdZ \ ex[hclhqd_p_ibijbihke_^h\Zl_evghfkh_^bg_gbbijh\h^gbdh\h^bgZdh\ZEZ[hjZlhjgZyjZ[hlZBaf_j_gb_gZijy`_gbygZjZaebqguomqZkldZowe_dljbq_kdhcp_ibP_ev jZ[hlu baf_jblv gZijy`_gb_ gZ mqZkld_ p_ib khklhys_f ba ^\moihke_^h\Zl_evghkh_^bg_gguokibjZe_c b kjZ\gblv _]h k gZijy`_gb_f gZdhgpZodZ`^hckibjZebJZkkfhljbfke_^mxsmxp_ivBaf_jbfgZijy`_gb_U1 gZi_j\hckibjZebkfko_fZU2 gZ\lhjhckibjZebkfko_fZb U gZ^\mokibjZeyo\f_kl_kfko_fZL_hjbyij_^kdZau\Z_lke_^mxs__khhlghr_gb_U = U1 + U2Ijh\_jbf_]hgZijZdlbd_Ijbf_j\uiheg_gbyjZ[hlu.GZijy`_gb_ gZ i_j\hf khijhlb\e_gbbkfko_fZU1 = 0,5 B.VKo_fZGZijy`_gb_ gZ \lhjhf khijhlb\e_gbbkfko_fZU2 = 1,0 B.Ko_fZV61GZijy`_gb_gZ^\mokhijhlb\e_gbyokfko_fZU = 1,5 B.9Ko_fZBawdki_jbf_glZevguo^Zgguo^_ckl\bl_evghke_^m_lqlhU = U1 + U2 < < <EZ[hjZlhjgZyjZ[hlZJ_]mebjh\Zgb_kbeulhdZj_hklZlhfP_evjZ[hlugZmqblvkyihevah\Zlvkyj_hklZlhf^eybaf_g_gbykbeulhdZ\p_ibJZkkfhljbfke_^mxsmxko_fm$Mkljhckl\hf h[hagZq_gguf gZ ko_f_ agZqdhfy\ey_lky j_hklZlHg iha\hey_l \jmqgmx j_]mebjh\Zlv khijhlb\e_gb_ < ^Zgghc jZ[hl_ [m^_lbkihevah\Zlvky iheamgdh\uc j_hklZl Hg mkljh_g ke_^mxsbf h[jZahf GZd_jZfbq_kdbcpbebg^jgZfhlZgZijh\hehdZihdjulZylhgdbfkeh_fg_ijh\h^ys_clhdhdZebgu ij_^gZagZq_gghc ^ey baheypbb \bldh\ ^jm] hl ^jm]ZGZ^ h[fhldhc jZkiheZ]Z_lky f_lZeebq_kdbc kl_j`_gv ih dhlhjhfm fh`_li_j_f_sZlvky iheamghd dZkZxsbcky k\hbfb dhglZdlZfb \bldh\ h[fhldbIjb ^\b`_gbb iheamgdZ kehc hdZebgu ih^ _]h dhglZdlZfb klbjZ_lky b lhdijhl_dZ_lhl\bldh\ijh\hehdbd iheamgdmZ q_j_ag_]hd h^ghfmbaaZ`bfh\LZdbf h[jZahf ijb i_j_f_s_gbb iheamgdZ ih \bldZf fu m\_ebqb\Z_f bebmf_gvrZ_f^ebgmgZfhlZgghcijh\hehdbIjbwlhfbaf_gy_lkykhijhlb\e_gb_p_ibZke_^h\Zl_evghb kbeZlhdZ\ g_cIjbf_j\uiheg_gbyjZ[hlu.IhklZ\bfiheamghdgZfZdkbfZevgh_khijhlb\e_gb_IjbwlhfkbeZlhdZgZZfi_jf_lj_ [m^_l fbgbfZevgZ GZqg_f mf_gvrZlv khijhlb\e_gb_ b fuaZf_lbf qlh \ wlhf kemqZ_ kbeZ lhdZ m\_ebqb\Z_lky GZqg_f m\_ebqb\Zlvkhijhlb\e_gb_b aZf_lbfqlhkbeZlhdZmf_gvrZ_lkyHlkx^Zk^_eZ_faZdexq_gb_qlhaZ\bkbfhklvkbeulhdZhlkhijhlb\e_gby²m[u\ZxsZy62EZ[hjZlhjgZyjZ[hlZBaf_j_gb_khijhlb\e_gbyijh\h^gbdZijb ihfhsbZfi_jf_ljZb \hevlf_ljZP_evjZ[hlugZmqblvkybaf_jylvkhijhlb\e_gb_ijh\h^gbdZijbihfhsbZfi_jf_ljZb \hevlf_ljZM[_^blvkygZhiul_qlhkhijhlb\e_gb_ijh\h^gbdZg_aZ\bkblhlkbeulhdZ\ g_fb gZijy`_gbygZ_]hdhgpZoJZkkfhljbf ijh\h^gbd k khijhlb\e_gb_fR ih dhlhjhfm l_q_l lhd I Z gZijy`_gb_ gZ _]h dhgpZo U < gZr_c9eZ[hjZlhjghc jZ[hl_ wlh j_Zebah\ZghgZke_^mxs_cko_f_J_hklZl gZ ko_f_ iha\hey_l baf_gylv$kbem lhdZ \ p_ib Ba aZdhgZ HfZ ba\_klghqlh R =Uijbq_fR FRQVWg_aZ\bkblhlkbeulhdZb gZijy`_gbyIIjh\_jbfwlhgZhiul_Ijbf_j\uiheg_gbyjZ[hlu.N12I:0,10,15U<23RHf2020BlZdfu^_ckl\bl_evghm[_^bebkvqlhkhijhlb\e_gb_ijh\h^gbdZihklhygghb g_aZ\bkblhlkbeul_dms_]hihg_fmlhdZb gZijy`_gbygZ_]hdhgpZoEZ[hjZlhjgZyjZ[hlZ‹ Baf_j_gb_fhsghklbb jZ[hlulhdZ\ we_dljbq_kdhceZfi_P_ev jZ[hlu gZmqblvky hij_^_eylv fhsghklv b jZ[hlm lhdZ \ we_dljbq_kdhceZfi_bkihevamyZfi_jf_lj\hevlf_ljb qZku>ey hij_^_e_gby fhsghklb eZfiu gZ^h kh[jZlv p_iv ihdZaZggmx gZ jbkmgd_mq_[gbdZBaf_jyykbemlhdZI \ eZfi_b gZijy`_gb_gZg_cfhsghklvfh`gh\uqbkeblvihnhjfme_P = UI>ey\uqbke_gbyjZ[hlulhdZ\eZfi_gZ^haZk_qv\j_fy\ l_q_gb_dhlhjh]heZfiZ]hj_eZJZ[hlZlhdZ\uqbkey_lkyihnhjfme_A = Pt.Ijbf_j\uiheg_gbyjZ[hlu.<uqbke_gb_fhsghklbeZfiuU=3 B; 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