The atomic mass of potassium is 39. if its atomic number is 9, it has how many neutrons within each potassium atom?

Why was the geocentric model of the solar system accepted by scientist for many years?

It is a blistering-hot day at the beach. You look at your portable thermometer, which it says it is 35. C. What is the temperature in Fahrenheit and Kelvin? Show the equations you use to make these conversions.

A rock is thrown horizontally at a speed of 5.0 m/s from the top of a cliff 64.7 m high. The rock hits the ground 18.0 m from the base of the cliff. How would this distance change if the rock was thrown at 10.0 m/s?

Since Earth produces a strong magnetic field

What needed to be present in marine mud to form fossils fuels?

According to the Theory of Continental Drift, what did the Earth's continents look like 255 million years ago?

What is the emf of a battery that increases the electric potential energy of 0.060 CC of charge by 0.70 JJ as it moves it from the negative to the positive terminal?

Why is gravitational potential energy negative?

What will happen to this current if a magnet is brought near the cord?

The kinetic energy of a sliding block came from the: kinetic energy of the string. kinetic energy of the board. gravitational potential energy of the block. gravitational potential energy of the mass on the hook.