An iron piece and wooden piece has equal weights in air .if they are removed from air to vacuum what happens to their weights?

When an object is heated it contracts. a. true b. false

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.

Where should a carbon monoxide detector be mounted?