Seismographs are usually buried deep underground. Why do you think the location of a seismograph is important when detecting an earthquake? Would the data be accurate if the seismograph were located on top of Earth’s surface?

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Which planet do you think would be easiest for humans to colonize some day?

Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. in a typical strike, the chameleon's tongue accelerates at a remarkable 220 m/s2 for 20 ms, then travels at constant speed for another 30 ms.