Has luster malleable ductile conductor solid at room temperature which element could be described by the list of properties above?.

How would doubling the made of an object change the objects potential energy

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

What are the applications of electromagnetic waves