Is the spaceship taking off or landing? 1

A spaceship flies around the Earth with a velocity of 10 rotations per day. The captain wants to increase the velocity to 12 rotations per day. What must the spaceship commander do? Accelerate or stop? 2

Is it possible to cover a star with a match held in your hand with your arm stretched? 3

4 In 1860 a meteorite fell in India. After drawing a trace of fire on the sky, the incandescent object fell in a swamp. At the crash site, the witnesses found a block of ice. How do you explain this paradox of nature?

5 A B C D E A plane flies at supersonic speed. The pilot is situated in the carling, in front part of the fuselage (point A). The engines are located on the wings (in points B and C). Can the pilot hear the sound of his plane?

6 Jupiter, the largest planet of the Solar System, deviates or attracts with his huge gravitational force the objects that could hit the Earth?

Kevin Grazier, NASA: Jupiter increases the danger „In our simulations, Jupiter is responsible for most of the collisions between the different types of cosmic waste and Earth. Instead of acting as a shield, Jupiter was, in fact, the sniper shooting the Earth”, said Grazier.

7 In 1851, Foucault, using a vertical pendulum, proved the fact that the Earth is rotating around its own axis. The pendulum was a 67m long string, having attached a 28 kg ball, designed with a pointed top. How do you think he managed to do this? Pantheon, Paris