Which is better: a large or small sample size? why?

Adding bleach to red food coloring causes the food coloring to lose its color. Is this a physical or chemical change? Explain.

The experiment is repeated with a piece of paper between the paperclip and the magnet. How might this affect the results Jack obtains? Explain your reasoning.

5th grade. Is air pressure higher in a vacuum or sea level

Describe what happens to the average kinetic energy of water molecules as water freezes.

An ice skater of a mass of 50kg is initially moving at 5m/s, before decreasing their kinetic energy by 75J. Calculate their final speed.

The heat added to a thermodynamic system minus the work done is equal to which of the following? A. the heat lost from the system B. the internal energy C. the total heat added to the system D. the Carnot efficiency of the system E.

How many kilometers are in 14,000 centimeters

In later years, motors improved and could be run directly from a 60 Hz power supply. As a result, 25 Hz power systems shrank and disappeared.

Acceleration increases over time once a force is applied to the object. Given a force of 10.0 Newtons, which mass will have the greatest acceleration?

The transfer of energy between two objects by electromagnetic waves is called