De thi dai hoc nam 2014 lan 1 mon vat ly cua Nhat Ban

De thi dai hoc nam 2014 lan 1 mon vat ly cua Nhat Ban De thi dai hoc nam 2014 lan 1 mon vat ly cua Nhat Ban De thi dai hoc nam 2014 lan 1 mon vat ly cua Nhat Ban De thi dai hoc nam 2014 lan 1 mon vat ly cua Nhat Ban De thi dai hoc nam 2014 lan 1 mon vat ly cua Nhat Ban

A B C D E (acceleration due to gravity) A F G g θ θ θ0 a b tan θ0 b a a √ a + b2 b √ a + b2 a b √ a2 + b2 a √ a2 + b2 b B v0 h h v0 d d h 2 C v kv k 1.0 m/s 1.0 × 10 kg/m −2 4.0 × 10−6 kg g = 1.0 × 101 m/s2 m3 1.4 × 10 k 0.10 0.20 0.30 0.40 kg/s D 0.20kg 2.5m g = 9.8m/s2 0.50 4 0.70 1.4 2.1 2.8 kg·m/s E ℓ m h 2mg h 1ℓ 1ℓ 3ℓ ℓ F ℓ m k 2 2 6 √ 2π √ 2π √ m 4k 2π 2m k 2π √ √ m 2k 2π 4m k m k G T x t 2 f t f 7 A A 10◦ C B C 15◦ C 2.4 × 102 g 10◦ C 15◦ C 0.7J/(g· K) −3 1.2 × 10 4.2J/(g· K) g/cm 1.7 1.4 × 103 1.2 × 106 1.0 × 109 cm3 B S ℓ p0 d F F p0 Sd ℓ p0 S(ℓ − d) ℓ p0 Sd ℓ−d p0 Sℓ ℓ−d p−V C A B B B B C C 3p0 A A B C A A p0 V0 V0 C 10 3p V 0 5p V 0 3p0 V0 5p0 V0 − p0 V0 − p0 V0 −3p0 V0 −5p0 V0 10 A A B 10cm/s C x 20cm x = 0cm 3.5s 11 11 B t◦ C V m/s V = 331.5 + 0.6t f f λ t λ t (a) (c) 12 f t λ t (a) (b) (a) (c) (b) (a) (b) (c) (c) (a) (c) (b) 12 C A C D F A F 13 A B C D E F 13 A( A 1) B( x 2) C( 3) D( 4) E( −q(q > 0) (x=0) 5) F( 6) x=a 4q x 0