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

How to easily explain the quantum state?

How much force would you need to cause a 20kg object to accelerate in a straight line to 20m/s2?

The magnitude of a vector can be positive or negative The magnitude of a vector can be less than the magnitude of one of its components.

A pumpkin was dropped from a balcony of a skyscraper. The pumpkin happened to land on a sidewalk force sensor and the below data was collected. After collecting all of the pumpkin gore, you determine that the pumpkin was 2.7kg in mass.

Objects with greater mass tend to fall faster on Earth than objects that are less massive, because of air resistance. A. True B. False

A light wave is traveling straight up out of the ocean then moves out into the air how do you expect the movement of the light wave to change the light wave will

To verify that this expression for (vf) α has the correct units of velocity, you need to perform some unit analysis. begin by finding the equivalent of a volt in terms of basic si units.

Which of the following best describes transverse waves

What are the arrangement of resistors in series

A pilot flies horizontally at 1300 km/h, at height h! 35 m above initially level ground. However, at time t! 0, the pilot begins to fly over ground sloping upward at angle u! 4.3° (Fig. 2-38).