A train travels 78 kilometers in 2 hours, and then 60 kilometers in 3 hours. What is its average speed?

As compared to developing countries, developed countries have a A higher average income, a higher rate of population growth, and produce more waste. B lower average income, a higher rate of population growth, and produce less waste.

Why is it not possible to see the other waves on the electromagnetic spectrum?

That which type of boundary do lithospheric plates collide

How far will a rubber ball fall on 20 seconds?

When reporting the velocity of an object, we need to include the value, the units and the direction the object was traveling. True or False?

O'Malley is riding on a bus which is moving at 10 m/s, and he throws a ball which he observes to be moving at 10 m/s relative to him in the direction of motion of the bus. What speed will Ophelia observe the ball to have?

Part 1. A girl leaves a history classroom and walks 10 meters north to a drinking fountain. Then she turns and walks 30 meters south to an art classroom. What is the girl's total distance traveled? Part 2. Using the information above from Part 1.

Which of the following is an example of a physical change but not a chemical change? A) The log gives off heat and light as it burns B) A tree stores energy from the sun in its fruit C) A penny lost in the grass slowly changes color D) A water pipe

Land masses that move on Earth are called: a. Continents b. Tectonic continents c. Tectonic plates d. Rock Masses

Will two separate 50db sounds together constitute a 100db sound explain mathematical