Exam: GRE (Verbal)

Definition: The property of having a spiral or twisted shape, often used in physics to describe the spin of particles.

Example: The helicity of the particle was measured during the experiment.

Definition: Having the shape or form of a helix, which is a three-dimensional spiral structure.

Example: The staircase had a helicoidal design that made it look elegant and modern.

Definition: Relating to a model of the solar system where the sun is at the center and the planets orbit around it.

Example: The heliocentric model changed our understanding of the universe by placing the sun at the center.

Definition: To send a message using a device that reflects sunlight, typically for communication over long distances.

Example: The soldiers used a heliograph to communicate with each other across the valley.

Definition: A tool used to send messages or take pictures using sunlight.

Example: The scientist used a heliograph to communicate with his team from a distance.

Definition: To send a message using a device that reflects sunlight, typically for long-distance communication.

Example: The military used a heliograph to send signals across the desert.

Definition: Related to a method of recording images using sunlight or the sun's rays.

Example: The scientist used a heliographic technique to capture the solar images.

Definition: A type of telescope that is used to measure small angles between celestial objects, especially to determine the size of the sun and other celestial bodies.

Example: The astronomer used a heliometer to measure the distance between the stars.

Definition: Relating to a device used for measuring the angles of celestial bodies by comparing their brightness with that of the sun.

Example: The heliometric measurements helped astronomers determine the distance to the stars more accurately.

Definition: The area in space around the sun where the solar wind affects the environment, including the entire solar system.

Example: The heliosphere acts as a protective bubble for the planets in our solar system.

Definition: A device that uses a movable mirror to reflect sunlight in a specific direction, often used for measuring solar radiation or in solar energy applications.

Example: The heliostat adjusted its mirror to keep the sunlight focused on the solar panel throughout the day.

Definition: A light, colorless gas that is used in balloons and for cooling. It is the second element on the periodic table and is found in natural gas and some radioactive materials.

Example: The party was fun, especially with the helium balloons floating around.