When does light refract?

when it travels through gases

when it crosses the boundary between two types of material

Light refracts every 2000 wavelengths.

when it travels through a vacuum

At a constant pressure and a temperature of 280 K, the gas in a cylinder has a volume of 10.0 liters. If the volume of the gas is increased to 20.0 liters, what is the new temperature? 2800 K 28 K 140 K 560 K

An object that is moving must have a change in A) its speed. B) its position. C) its acceleration. D) its applied force.

The energy associated with the motion and position of an object is called A. kinetic energy. B. potential energy. C. gravitational potential energy. D. mechanical energy.

Examine the layers of rock. Identify and explain which layer contains the youngest fossils.

Why can the volume of a sample of plasma change when the substance is moved from one container to another? Plasma is made of charged ions and electrons, so they interact differently in different places.

Scientists who study races and their origins are called A. anthropologists. B. ethnologists. C. paleontologists. D. sociologists.

Why are telescopes that detect non - optical radiation useful for studying objects in space

Which of the following is not an application of Doppler technology? police speed guns weather radar ultrasound imaging of the liver determining the motion of a star

For a constant voltage, increasing the resistance will cause the current to decrease. true or false

Which of the following is an example of a testable scientific hypothesis? A) Why do plants grow better in the Sun than in the shade? B) Peacocks have prettier tail feathers than pigeons do.