A train travels 55 km south along a straight track in 34 minutes. What is the train's average velocity in kilometers per hour?

Define thermodynamics?

A person sees a purple flower at a florist shop. What's true about the purple flower?

Which forms of energy are involved when you turn on a desk lamp and the bulb becomes hot?

Which of the following components of an electrical circuit is a source of voltage? A. a switch B. a battery C. a resistor D. a light bulb

How and why dose air pressure change with altitude in the atmosphere

How much work is done lifting a 12-m chain that is initially coiled on the ground and has a density 2 kg/m so that its top end is 11 m above the ground? (Assume that acceleration due to gravity is g = 9.8 m/s2.)

Which is a correct step in a scientific experiment involving acids and bases?

Objects can be accelerating and traveling at constant velocity at the same time. True or False

What kind of star gives rise to a type i supernova? a. white dwarf stars b. massive main sequence stars c. red giant stars?

Example of an object in motion