How do I calculate the frequency of an observer

A train travels 600 km in 4 hours. what is the speed of the train?

What does diatomic mean?

Isotopes are atoms of the same element (like Chlorine-35 and Chlorine-37) that have a different mass because they have a different number of protons electrons neutrons protons and neutrons

You are at a train station, standing next to the train at the front of the first car. The train starts moving with constant acceleration, and 9.0 s later the back of the first car passes you.

A sound wave is described by D (y, t) = (0.0200mm) * sin[ (8.96rad/m) y + (3140rad/s) t+π/4rad], where y is in m and t is in s.

A school bus full of students drives down the road. Because it is moving, it has 1. potential energy because it has the ability to take the students to school. 2. kinetic energy because it has the ability to take the students to school. 3.

How many additional valence electrons does fluorine need to have a full valence shell? A. One B. Two C. Eight D. Seven

If you double the radius of the earth and keep the mass of the earth the same, the acceleration of gravity on the surface of the earth will be approximately ...

In an electron dot diagram the symbol for an element is used to represent

The space shuttle undergoes an acceleration of 53.9 m/s2. How fast is it traveling at the end of 55.2s