The metal has five times as much destructive power as an explosive warhead of the same weight.Ī kinetic energy weapon (also known as kinetic weapon, kinetic energy warhead, kinetic warhead, kinetic projectile, kinetic kill vehicle) is a weapon based solely on a projectile's kinetic energy instead of an explosive or any other kind of payload. The Homing Overlay Experiment used a metal fan that was rolled up during launch and expanded during flight. An explosive weapon or device may also be designed to produce many high velocity projectiles by the break-up of its casing these are correctly termed fragments. Note the two meanings of 'rocket' (weapon and engine): an ICBM is a guided missile with a rocket engine.Īn explosion, whether or not by a weapon, causes the debris to act as multiple high velocity projectiles. In military terminology, a rocket is unguided, while a missile is guided. Some projectiles provide propulsion during flight by means of a rocket engine or jet engine. Railguns utilize electromagnetic fields to provide a constant acceleration along the entire length of the device, greatly increasing the muzzle velocity. Light-gas guns use a combination of these mechanisms. Most projectile weapons use the compression or expansion of gases as their motive force.īlowguns and pneumatic rifles use compressed gases, while most other guns and cannons utilize expanding gases liberated by sudden chemical reactions by propellants like smokeless powder. If episodes occur more than once a month or require hospitalization, your doctor may recommend preventive medicine, such as amitriptyline, propranolol (Inderal), cyproheptadine and topiramate.Projectile and cartridge case for the huge World War II Schwerer Gustav artillery piece. While you may feel well between episodes, it's very important to take medications as prescribed by your doctor. Avoiding those triggers can reduce the frequency of episodes. Many people know what triggers their cyclic vomiting episodes. The acid in vomit can corrode tooth enamel. Sometimes the esophagus becomes so irritated it bleeds.

The stomach acid that comes up with the vomit can damage the tube that connects the mouth and stomach (esophagus). Severe cases of dehydration may need to be treated in the hospital. Excessive vomiting causes the body to lose water quickly. ComplicationsĬyclic vomiting syndrome can cause these complications: If it doesn't, your doctor will continue testing for cyclic vomiting syndrome. To rule out cannabis hyperemesis syndrome, you need to stop using marijuana for at least one to two weeks to see if vomiting lessens. People with this syndrome often demonstrate frequent showering or bathing behavior.Ĭannabis hyperemesis syndrome can be confused with cyclic vomiting syndrome. However, chronic marijuana use can lead to a condition called cannabis hyperemesis syndrome, which typically leads to persistent vomiting without normal intervening periods. In adults, cyclic vomiting syndrome is also associated with a personal or family history of migraines.Ĭhronic use of marijuana (Cannabis sativa) also has been associated with cyclic vomiting syndrome because some people use marijuana to relieve their nausea. But many children with cyclic vomiting syndrome have a family history of migraines or have migraines themselves when they get older. The relationship between migraines and cyclic vomiting syndrome isn't clear. Identifying the triggers for vomiting episodes may help with managing cyclic vomiting syndrome. Overeating, eating right before going to bed or fasting.Certain foods and drinks, such as alcohol, caffeine, chocolate or cheese.Anxiety or panic attacks, especially in adults.Emotional stress or excitement, especially in children.

Specific bouts of vomiting may be triggered by: Some possible causes include genes, digestive difficulties, nervous system problems and hormone imbalances. The underlying cause of cyclic vomiting syndrome is unknown.

Projectile synonym