Imperialism in the U.S. Essay ... DBQ 15 Imperialism is the policy of extending the role of authority of a nation over a foreign country, usually in material gain, Military expansion and Economical reasons. In the late 1800âs and early 1900âs, the United States went through an era of imperialism.
Portable gas detector. A gas detector is a device that detects the presence of gases in an area, often as part of a safety system. This type of equipment is used to detect a gas leak or other emissions and can interface with a control system so a process can be automatically shut down.
The calorimeter has a gas collector that adapts to the subject and a system that measures the volume and concentrations of O 2 and CO 2 minute by minute. Through a unidirectional valve, the calorimeter collects and quantifies the volume and concentration of O 2 inspired and CO 2 expired by the subject.