A football player who weighs 550 N stands indoors wearing her football boots. The boot’s ‘blades’ (long studs) have a total area of 30 cm 2 . Only her blades are in contact with the floor. Calculate the player’s pressure on the floor. Give the units.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.