A train has a constant velocity of 2 m/s east. What is the magnitude of the horizontal acceleration of the train?

Is velocity a scalar or a vector

At what approximate temperature and pressure can all three phases of water exist simultaneously? 0°C, 760 mmHg 0°C, 5 mmHg 80°C, 380 mmHg 100°C, 760 mmHg

an ideal gas system undergoes an adiabatic process in which it expands and does 20 J of work on its environment. how much energy is transferred into the system as heat

When earth's shadow falls on the moon, the shadow causes a

When a gas in a container is squeezed to half its volume, its density?

Consider a weather balloon floating in the air. There are three forces acting on this balloon: the force of gravity is FG, the force from lift towards balloon is FL, and the force from the wind is labeled Fw.

If you walk at a speed of 3 meters per second, how far will you walk in 11 seconds?

Are oranges called oranges because oranges are orange, or is orange called orange because oranges are orange?

An object that has an equal number or protons and electrons

A ray of light strikes a thick sheet of glass (n = 1.5) at an angle of 25° with the normal. find the angle of the refracted ray within the glass with respect to the normal.