If a substance cannot be separated physically or chemically it is?

Halley's comet has a perihelion distance of 0.6 au and an orbital period of 76 years. what is its aphelion distance from the sun?

What is the unit and tool to measure the mass of a rock?

A what occurs when light changes direction after colliding with particles of matter

According to the Arrhenius equation, changing which factors will affect the rate constant?

How could a natural event, like an earthquake, make it difficult to use the law of superposition

The distance from home plate to the pitchers mound is 18.5 meters. For a pitcher capable of throwing at 3.85m/s (86mi/hr), how much time elapses between the release of the ball and the ball passing home plate?

A squirrel sitting on the ground starts to run with an acceleration of 5.1 m/s 2. How fast is the squirrel going after 0.25 seconds? A. 20.4 m/s B. 1.28 m/s C. 0.49 m/s D. 3.1 m/s

Describe how the competition between invasive and native species might affect a food web

Which vector should be negative? any vector whose magnitude is less than 1 a displacement in the direction North any vector whose magnitude is greater than 1 the velocity of a falling object

Acceleration is a scalar quantity true or false