Aufgabe 1 ( 3 Punkte) Eine Batterie mit 48 V Leerlaufspannung und einem Innenwiderstand \( \mathrm{Ri}=1,5 \Omega \) wird einem Widerstand von \( 4,0 \Omega \). Berechnen Sie den Laststrom und die Klemmenspannung. Zeichnen Sie zuerst das Ersatzschaltbild und tragen Sie das Gegebene in Grün und das Gesuchte in Rot ein.

Which fundamental force allows you to use a compass? A. Strong nuclear B. Weak nuclear C. Electromagnetic D. Gravitational

Which force operates at a distance of 1 m ? A. Mechanical B. Weak nuclear C. Strong nuclear

Which of the following best describes the magnetic field lines around an isolated, permanent bar magnet? A. The field lines go from the magnet's north pole into its south pole. B. The field points straight into the bar magnet along radial lines that extend to infinity. C. The field points out along radial lines from the bar magnet, extending straight out to infinity. D. The field lines go from the magnet's south pole into its north pole.

Um motorista conduzia seu carro a \( 90 \mathrm{~km} / \mathrm{h} \), quando avistou um sinal fechado a frente e acionou o freio, que proporcionou uma desaceleração constante de \( 5 \mathrm{~m} / \mathrm{s}^{2} \) até a

A satellite with a mass of 150 kg fires its engines to increase velocity, thereby increasing the size of its orbit about Earth. As a result, it moves from a circular orbit of radius \( 7.5 \times 10^{6} \mathrm{~m} \) to an orbit of radius \( 7.7 \times 10^{6} \mathrm{~m} \). What is the approximate change in gravitational.force from Earth as a result of this change in the satellite's orbit? (Recall that Earth has a mass of \( 5.97 \times 10^{24} \mathrm{~kg} \) and \( G=6.67 \times 10^{-11} \mathrm{~N} \cdot \mathrm{~m}^{2} / \mathrm{kg}^{2} \).) A. -54 N B. -216 N C. -113 N D. -148 N