Why is it important to define a frame of reference

1. Assume that the dunes in a field of barchans sand dunes are moving at an average long-term rate of 30 meters (about 100 feet) a year. How many years does it take a dune to move a distance of 500 meters?

What chemical property is present in substances that react slowly to oxygen?

Suppose there is a potential difference between the metal that ejects the electrons and the detection device, such that the detector is at a lower potential than the metal.

Which statement about one of Newton's laws of motion is incorrect? A) the total force on an object is calculated by multiplying it mass times its acceleration, B) An object is motion continues in motion unless acted upon by and outside force.

How know that rocks formed from the seafloor sediments deposited in the Amadeus basin were softer than the arkose sandstone

The grounded conductor and the grounding conductor are one and the same conductor and perform the same function.

Summarize Newton's First Law

13. How is 0.00069 written in scientific notation? A. 69 x 10-5 B. 6.9 x 104 C. 0.69 x 10-3 D. 6.9 x 10-4

A 1300 kg sports car accelerates from rest to 95 km/h in 7.4 s. What is the average power delivered by the engine?.

Two children playing on a frictionless garden gate invent a new game called "gate". The idea is that they will get on opposite sides of the gate and each push such that the gate does not move.