Is the formation of rust on an iron nail a chemical change or a physical change?

When frozen ice cream melts, the atoms in the ice cream move further apart. move closer together. become ions. become electrons.

What type of lens is used to make objects appear smaller and clearer convex or concave?

What occurs when the pitch increases and the sound source is moving?

Which example most effectively illustrates the dual nature of light? a. cameras that use photographic film b. solar panels c. radio antennas d. burglar alarms Must be sure about your answer

JUILS What step of the scientific method immediately follows "state the problem"?

Another machine uses aninput force of 200 newtons to produce an output force of 80 newtons

An empty capacitor is connected to a 12.0 V battery and charged up. The capacitor is then disconnected from the battery, and a slab of dielectric material (dielectric constant "k" = 2.8) is inserted between the plates.

how long can you afford to stop for lunch if you can drive a steady 90 km/h on the highway and must take a 225 km trip in 210 min?

Which layer of the Sun's atmosphere is farthest from the surface of the Sun? A) troposphere B) corona C) chromosphere D) photosphere

Which of the following is a supersonic speed? Mach 0.005 Mach 0.05 Mach 0.5 Mach 5