Gravitational energy

is a type of potential energy
is the energy of an object's position
is stored energy
all of the above

Which term refers to the total dollar value of the goods and services produced in a country in a year?

According to the cladogram, which organisms have roundworms as a common ancestor?

Four different thermometers were used to measure the temperature of a sample of pure boiling water. the measurements are recorded in the table below. thermometer temperature reading 1 temperature reading 2 temperature reading 3 w 100.1°c 99.9°c 96.9°c x 100.4°c 102.3°c 101.4°c y 90.0°c 95.2°c 98.6°c z 90.8°c 90.6°c 90.7°c the actual boiling point of pure water is 100.0°c. what can be concluded from the data about the reliability and validity of the thermometers?