A stationary player accelerates from the home plate to first base. The player takes 6.61 s to get to first base and arrives moving at 5.45 m s (a) Show that the average acceleration is \( 0.825 \mathrm{~m} \mathrm{~s}^{-2} \).

ถ้า \( \overrightarrow{\mathrm{C}}=\overrightarrow{\mathrm{A}}+\overrightarrow{\mathrm{B}}, \overrightarrow{\mathrm{D}}=\overrightarrow{\mathrm{A}}-\overrightarrow{\mathrm{B}} \) และขนาดของ \( \overrightarrow{\mathrm{A}}, \overrightarrow{\mathrm{B}} \) และ \( \overrightarrow{\mathrm{C}} \) มีค่าเท่ากับ 5 นิวตัน, 7 นิวตัน และ 10 นิวตั ตามลำดับ จงหาขนาดของ \( \overrightarrow{\mathrm{D}} \)

Arus listrik sebesar 5 mA mengalir pada suatu kawat penghantar selama 0,1 sekon. Berapa besar muatannya ?

19. Ordina Tre automobili accelerano mentre percorrono un tratto rettilineo di strada: auto 1: passa da \( 25 \mathrm{~m} / \mathrm{s} \) a \( 35 \mathrm{~m} / \mathrm{s} \) in 10 s auto 2: passa da 0 a \( 30 \mathrm{~m} / \mathrm{s} \) in 15 s auto 3: passa da \( 32 \mathrm{~m} / \mathrm{s} \) a \( 12 \mathrm{~m} / \mathrm{s} \) in 5 s Ordinale per accelerazione crescente.

In one of the processes on the production line at a Sugar Mill, a quantity of gas occupying an original volume of \( 1500 \mathrm{dm}^{3} \) and at an original temperature of \( 300^{\circ} \mathrm{C} \) is expanded adiabatically to a temperature and pressure of \( 135^{\circ} \mathrm{C} \) and 200 kPa respectively. After this adiabatic expansion the gas is heated at constant volume until a pressure of 300 kPa is reached. Given: \( \mathrm{R}=0.286 \mathrm{~kJ} \cdot \mathrm{~kg}^{-1} \cdot \mathrm{~K}^{-1} ; \quad \mathrm{C}_{\mathrm{p}}=1.001 \mathrm{~kJ} \cdot \mathrm{~kg}^{-1} \cdot \mathrm{~K}^{-1}, 1 \mathrm{dm}=10^{-1} \mathrm{~m} \) Assist the production supervisor to: 1.1 Draw a fully labelled \( \mathrm{P}-\mathrm{V} \) diagram for this multi-process system. 1.2 Find the mass of the gas and pressure of the gas before the adiabatic expansion process. 1.3 Find the final volume and final temperature after both processes. 1.4 Find the specific work and specific heat transferred after both processes.

A block weighing 500 N is at the point of just starting to move down a rough inclined plane when supported by a force of 200 N acting parallel to the plane in an upward direction. The same block, on the same rough inclined plane, is on the verge of moving up the plane when pulled by a force of 300 N acting parallel to the plane. Compute the inclination of the plane and the coefficient of friction between the inclined plane and the block.