yes because they have their own magnetic fields due to which they can easily detect by the detecter
Modern naval ships use some form of Sonar to detect submarines. Additionally, some ships are equipped with Magnetic Anomaly Detectors (MAD gear) that detect a submarine's impact on the Earth's magnetic field in that area. The gear is typically carried aboard helicopters temporarily stationed on the ship.
No
A depressed person is easy to detect. The other situation is also easy to detect. Watching his behavior is enough to get at a conclusion.
really easy
True clubfoot is usually obvious at birth
Sonar is used to detect other vessels or ships/submarines through a tube-like device> Andrea
A coffe machine
yes they were smaller, quicker, and had a longer range of firing power than the Spanish. the Spanish had big bulky ships that were easy to outmaneuver with England's small ships.
you cant. there is only like 2 ways to cheat, and they are very easy to detect.
X-ray machines can detect the shape of money and with the metal strip in most higher denominations it would be very easy to identify
what
They used the longships for battles. The longship was the strongest weapon the Vikings had. The Viking long ships had no front or back, so it was easy to manoeuvre