A metal detector used in airports is actually a large coil of wire carrying a
small current. Explain how it detects a gun, even if it is wrapped in towels
in a suitcase.

Answer with Explanation:

A "metal detector" helps detect metals such as "guns" in the airport through "pulse induction." It is electromagnetic in nature which means it uses one or more coils of wire, which acts as a transmitter and receiver. It transmits a time-varying electric magnetic field, which is propagated in several directions, including towards the metal (which is the target). These are considered "short burst of pulses." Once it detects a metal object, an opposite magnetic field is then created by the pulse in the object. The magnetic field will then collapse resulting to a reflected pulse that is marked by an echo. Such pulse takes quite a long time to disappear (if the object detected is metal). This is the indicator then that even if a gun is wrapped in towels inside a suitcase, it can still be detected by a metal detector.

speed

ratio of distance traveled to time interval

net force

vector sum of forces on object

object

source of diverging light rays either luminous or illuminated

don't remove my answer im trying my best to answer them

explanation:

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.