If a man drives his car 6km North before making a right hand turn and driving 6 km to the East. then, he makes a left hand turn and travels another 2 km to the north. What is the magnitude of the overall displacement of the driver ?

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

Which type of wave can travel without a medium

Aballet student who learns with the of his instructor is demonstrating learning.