## Interactive Resources

1.

**Astrophysics Calculator**
- A neat calculator at the University of Wisconsin with many built-in astronomical constants. [Java]

2.

**USNO Sun and Moon Calculator**
- Enter your location on Earth and it calculates sunrise, sunset etc.

3.

**Distance between points on Earth**
- Has nothing to do with the sun, but it is pretty fun to use!

4.

**Cosmology Calculator**
- Has nothing to do with the sun, but again it is very useful to us astronomers.

5.

**Sample Size Calculator**
- Tells you how big your sample needs to be to get to a certain level of statistical confidence. Great resource to apply to data and meaasurements to make sure your answers are statistically significant.

6.

**Radiation Dose and Risk Calculator**
- Converts exposure and dosage in Seiverts, Greys, Roentgens etc, into risks for cancer.

7.

**Ohms Law Calculator**
- Convert currents, voltages, resistences solving E = I x R.

8.

**Earth's Magnetic Field Calculator**
- Find the strength of Earth's field anywhere from on the surface into space.

9.

**Frequency and Wavelength Calculator**
- For electromagnetic radiation. It also gives the energy of each photon.

10.

**Mass to Energy Calculator**
- Converts mass to energy using Einstein's Famous Formula.

11.

**Electron Voltage to Electron Properties Calculator**
- If you imnput the energy of the electron in Volts, the calculator tells you it speed, mass, momentum and DeBroglie wavelength.

12.

**Units Converter**
- For energy, speed, length, mass etc.

13.

**Magnetic Unit Converter**
- Converts from one unit into many others.

14.

**Energy and Power Conversion**
- Converts Joules and kilowatts into other units.