... 11 Vì nói chiện với gần ao hồ , tiếng nói nghe rõ ? 12. Có bể chứa nớc , bể có nắp miệng nhỏ ,bể không nắp đậy Nói vào bể em nghe thấy tiến vang ,nhng...
... súng ngn nht ca bc x Rnghen bng bao nhiờu ? Coi ng nng u ca e ri catốt khụng ỏng k A 120 ,2pm B 148pm C 126 pm D 124 ,2pm Cõu 108: Mt ng Rnghen phỏt tia X cú bc súng ngn nht l 1,875.10-10m tng cng ... ng rnghen cú th phỏt l 1A Hiu in th gia anụt v catụt ca ng rn ghen l A 1,24kV B 10,00kV C 12, 42kV D 124 ,10kV Gv-Trng THPT Cỏt Ngn BT-Súng ỏnh sỏng Trang 7/10 Bn vinh hoa ang ch ngi ham hc,B vc ... in th gia anod v catod l bao nhiờu ? A U = 18000Vụn B U = 16000Vụn C U = 21000Vụn D U = 120 00Vụn Cõu 112: Một ống Rơnghen hoạt động với hiệu điện 2,5kV, đối âm cực đợc làm nguội dòng nớc lạnh...
... VẬT LÝ 12 – SÓNG ÁNH SÁNG – TÁN SẮC ÁNH SÁNG – LÝ THUYẾT Bước sóng ánh sáng chân không λ = 𝑐 𝑓 Bước sóng ... lệch xa pháp tuyến tia tới (ví dụ tia sáng truyền từ nước không khí) GMAIL: HONGMINHBKA VẬT LÝ 12 – SÓNG ÁNH SÁNG – TÁN SẮC ÁNH SÁNG – LÝ THUYẾT Hiện tượng phản xạ toàn phần Đặt vấn đề: Từ phương ... mặt bên trái lăng kính ( ánh sáng truyền song song với tiết diện đáy) GMAIL: HONGMINHBKA VẬT LÝ 12 – SÓNG ÁNH SÁNG – TÁN SẮC ÁNH SÁNG – LÝ THUYẾT Lúc đó: Ánh sáng truyền từ môi trường không khí...
... Hình 2.10 : Màn hình soạn thảo trang web 47 Hình 2.11 : Các tag tùy chọn 47 Hình 2 .12 : Tùy chọn soạn thảo Hot Potatoes 48 Hình 2.13 : Soạn thảo tập với Hot Potatoes 48...
... a—we say that f is discontinuous at a (or f has a discontinuity at a) if f is not continuous at a Physical phenomena are usually continuous For instance, the displacement or velocity of a vehicle ... x) = x (b) 1 if x = x2 − x − if x ≠ (c) f ( x) = x − 1 if x = (d) f ( x) x 1.5 P12 Example 2(a) SOLUTION Notice that f(2) is not defined So, f is discontinuous at Later, we’ll...
... 2 Ex 12. 10 – What is the molar mass of a protein if 5.87 mg per 10 mL gives an osmotic pressure of 2.45 ... the nonpolar tail tends to coagulate together to form a spherical structure called a micelle 11 12 Soap Action • most dirt and grease is made of nonpolar molecules – • • making it hard for water...
... Balloons, Bed of Nails, Magdeburg hemispheres Example 120 lb woman putting all her weight on 2in2 of heals Pressure = 120 lb/2in2 = 60 lb/in2 Is that a lot? Comparison: atm = 14.7 lb/in2 ... Temperature Using this ice melts at 32°F and water boils at 212 F (Not overly convenient) Note: 180°F between boiling an freezing Celsius (Centigrade) Scale: 0°C Ice Melts 100°C Water Boils Note a ... 0.50 Steam 2010 0.48 Silver 234 0.056 Aluminum 900 0.215 Copper 387 0.0924 Gold 129 0.0308 Iron 448 0.107 Lead 128 0.0305 Brass 380 0.092 Glass 837 0.200 Wood 1700 0.41 Ethyl Alcohol 2400 0.58...
... printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED WMP/Jun10/PHA3/B3/X 12 There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED...
... in Figure Figure 20 60 280 80 260 100 240 V rotary potential divider 30 C2 40 32 switch S 340 C1 12 0 14 22 160 180 200 fixed resistor control knob of rotary potential divider at the centre of ... printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED WMP/Jun11/PHA3/B3/XPM1 12 There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED...
... the scale below which can be photocopied • a piece of hardboard or similar sheet material, 12 cm × 12 cm on which the rotary scale and potentiometer are to be mounted 20 40 32 340 Duplicate without ... copies of the template shown below, cutting out around the dotted lines 300 60 280 80 260 100 240 120 14 22 160 180 200 Turn over ᮣ WMP/Jun11/PHA3/B3/XTN Fix the scale onto the square of hardboard ... to the potentiometer (called a ‘rotary potential divider’ in the question) 300 260 100 240 V 80 120 0 14 22 10 kΩ rotary potential divider 280 C2 60 160 180 200 2.2 kΩ control knob of rotary potential...
... up to 16° The student’s results are shown below α/° 10 12 14 16 WMP/Jun10/PHA3/B3/XTN D/mm 0.0855 0.0428 0.0285 0.0214 0.0171 0.0143 0. 0122 0.0107 21 Do not write outside the box The student ... closest to the slit, as shown in Figure y2 = (1 mark) Turn over ᮣ WMP/Jun10/PHA3/B3/XTN 12 (b) Do not write outside the box The LED will emit green or red light depending on the setting...
... measurements θ/° V / mV θ/° V / mV θ/° 20 140 260 40 160 280 60 180 300 80 200 320 100 220 340 120 240 360 V / mV (1 mark) (b) Adding a suitable scale to the vertical axis, plot on the grid on ... (3 marks) WMP/Jun11/PHA6/B6/XPM1 θ /° V / mV 40 80 120 160 200 240 280 320 360 Do not write outside the box Question continues on the next page WMP/Jun11/PHA6/B6/XPM1 ... printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED WMP/Jun11/PHA6/B6/XPM1 12 There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED...
... 20 40 32 340 Template 60 300 circular scale 280 80 260 100 120 24 circular scale 0 14 22 160 180 200 Turn over ᮣ WMP/Jun11/PHA6/B6/XTN 12 Section A Do not write outside the box Part 1 You are to ... scale scrap of newspaper showing photograph stack of 12 glass slides placed over the scrap of newspaper scrap of newspaper placed over the stack of 12 glass slides microscope reading = R0 microscope ... cylindrical pipe – the dimensions of the beaker used in trials were height (from base to rim) = 125 mm; rim diameter = 100 mm; body diameter = 90 mm • measuring cylinder, glass or plastic, to...