26 Costante di gravitazione universale La costante di Newton \( G \), che compare nell'espressione della forza gravitazionale, vale: \( G=(6,673 \pm 0,010) \cdot 10^{-11} \mathrm{~m}^{3} /\left(\mathrm{kg} \cdot \mathrm{s}^{2}\right) \) Nota che nelle misure di precisione l'errore è talvolta riportato con due cifre significative. Qual è l'errore percentuale su \( G \) ?

body hanging by two strings and equilibrium \( T_{2}=60 \mathrm{~N} \) then \( w=\cdots \mathrm{N} \)

3) if \( \overrightarrow{F_{1}}, \overrightarrow{F_{2}}, \overrightarrow{F_{3}} \) are 3 forces that meets at a point and equilibrium: then the resultant of \( \overrightarrow{F_{1}}, \overrightarrow{F_{2}} \) equal : \( \begin{array}{lll}\text { 1) } \overrightarrow{F_{1}}, & \text { 2) } \overrightarrow{F_{1}}+\overrightarrow{F_{2}} & \text { 3) } \overrightarrow{F_{3}}\end{array} \)

b. Un moteur consomme \( x \) litres d'essence de masse volumique \( \rho \) et de pouvoir énergétique \( H \) en heures. 1. Quelle est la puissance \( P \) de ce moteur? 2. Trouverais-tu une valeur plus faible ou plus élevée si tu tenais compte des pertes d'énergie? c. Un thermoplongeur de puissance \( P \) permet de chauffer une masse \( m \) de liquide de chaleur massique c de la température \( T_{7} \) à \( T_{2} \) en un temps \( t \). 1. Exprime la masse de liquide chauffée par ce thermoplongeur. 2. Exprime la température \( T_{2} \) du liquide.

Question 6/13An air tank is exposed to ambient temperature.If you set the air pressure of the tank to 35 psi for a leak test and find that 24 hours later the tank's pressure has increased, what could've happened?The tank leakedThe tank drew in additional airThe ambient temperature increasedThe ambient temperature decreased

Essay problem a body placed on rough horizontal level and two horizontal coplanar forces affected on it \( 6,10 \mathrm{~N} \) angle between them \( 60^{\circ} \) then the body's about to move if friction coefficient \( \frac{2}{3} \) then body weight \( =\ldots, \mathrm{N} \)