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Home Question Bank Physics Archive 2024 December 19

Physics Questions from Dec 19,2024

Browse the Physics Q&A Archive for Dec 19,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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1.17. Поезд движется со скоростыю \( v_{0}=36 \) км/ч. Если выключить ток, то поезд, двигаясь равнозамедленно, оста- навливается через время \( t=20 \mathrm{c} \). Каково ускорение \( а \) по- ездар На каком расстоянии \( s \) до остановки надо выклю- чить ток? 19. You are gold panning on the Sacramento River when you come across a massive nugget! You want to figure out the mass of the nugget so you can estimate if you can retire or not, but your balance is broken! Luckily, you paid attention in AP Physics and you always have a spare \( 200 \mathrm{~N} / \mathrm{m} \) spring handy. You attach the nugget to the spring and it oscillates at 4 Hz . a) What is the period? b) Find the mass of the unknown nugget. 1.9. Камень бросили вертикально вверх на высоту \( h_{0}=10 \) м. Через какое время \( t \) он упадет на землю? На ка- кую высоту \( h \) поднимется камень, если начальную скорость камня увеличить вдвое? 10 What does the Moon's gravity affect? (A) Both the solid parts of Earth and the oceans (B) The solid parts of Earth only (C) Both the Moon and the oceans, but not Earth (D) The Moon only 5 Based on information from the movie, what would happen to the number of high tides in any given area if the rate of Earth's rotation doubles? (A) They will occur about as often as before (B) They will occur about half as often (C) They will occur about four times more often (D) They will occur about twice as often Un niño está parado sobre un carrito, ambos en reposo, el primero pesa 30 kg y cuando salta hacia adelante a \( 2 \mathrm{~m} / \mathrm{s} \), el carrito es lanzado hacia atrás a \( 12 \mathrm{~m} / \mathrm{s} \). Si se desprecia la fricción, ¿cuál es la masa del carrito? A) 6.0 kg B) 5.0 kg C) 2.5 kg D) 0.8 kg 4. A water tank is a cuboid with dimensions 40 cm by 90 cm by 70 cm . The tank is initially empty and is then filled with the water which flows from a pipe of cross-sectional area \( 1.2 \mathrm{~cm}^{2} \) at a speed of \( 3.5 \mathrm{~m} / \mathrm{s} \). Calculate the time, in minutes, that it takes to fill the tanks completely. 4. A water tank is a cuboid with dimensions 40 cm by The tank is initially empty and is then filled with the water which flows from a pipe of cross-sectional area \( 1.2 \mathrm{~cm}^{2} \) at a speed of \( 3.5 \mathrm{~m} / \mathrm{s} \). Calculate the time, in minutes, that it takes to fill the tanks completely. \begin{tabular}{|l|l|}\hline Sorular \\ \hline \( \mathbf{3} \) & Bir otomobil hareketsiz bir durumdan 100 km ye 14 s de hızlanıyor. Ivmesini hesapla. \\ \( \mathbf{4} \) & Bir otobüs \( 40 \mathrm{~km} / \mathrm{h} \) hızla hareket ederken 5 s frenleme yapıyor ve duruyor. Frenleme süresindekj \\ ivme ne kadardır? \end{tabular} When a constant force is applied to an object, the acceleration of the object varies inversely with its mass. When a certain constant force acts upon an object with mass 2 kg , the acceleration of the object is \( 38 \mathrm{~m} / \mathrm{s}^{2} \). When the same force acts upon another object, its acceleration is \( 4 \mathrm{~m} / \mathrm{s}^{2} \). What is the mass of this object?
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