Battery capacity tester
That's a 'hydrometer'.
A voltmeter and an ammeter
A violin can be used, but its effectiveness is limited.
Cats
Cats
A survey battery test is a collection of related survey questions or assessments that are designed to measure various aspects of an individual's skills, abilities, attitudes, or characteristics. These tests are often used in research, education, or psychology to gather data and insights on specific topics.
ocotypergram
this is an instrument in the laboratory that is used to clean various kinds of test tubes.
It is also called the Kirby-Bauer test. It is used to determine the effectiveness of an antibiotic against a bacterium.
Piano
opacimeter
Spirometer