A train travels 94 kilometers in 2 hours, and then 58 kilometers in 4 hours what is it's average speed

Select all that apply to electrons and energy levels. - Scientists have not yet determined exactly why electrons do not collapse into the nucleus. - Electrons cannot be located between levels except when they are in the process of moving.

A box of mass 1 kg is hung from a spring scale. The reading on the spring scale is approximately 10N. What would be the reading on the spring scale if a box of mass 5 kg is hung from it? (Assume acceleration due to gravity to be 10 m/s2.

A girl delivering newspapers travels one block west then three blocks north then five blocks east. what is her resultant displacement?

A car uses its brakes to stop on a level road. During this process, there must be a conversion of kinetic energy into (1) light energy (2) nuclear energy (3) gravitational potential energy (4) internal energy

What is the difference in the speed of sound on a warm day versus on a cold day?

Which element in period 3 on the periodic table is a metallioid

Your 300 mL cup of coffee is too hot to drink when served at 87.0 degrees Celsius. What is the mass of the ice cube, taken from a - 15.0 degrees Celsius freezer, that will cool your coffee to a pleasant 65 degrees Celsius?

How can the same material bend in one situation but break in another

According to Newton's first law of motion, what would happen to a car traveling at a constant velocity of 55 MPH to the west in the absence of an unbalanced force?

The Appalachian mountain range in the Eastern United States was once much taller than the Rocky mountain range in the Western United States.