Which type of energy is converted into mechanical energy when a person walks?

A. Electromagnetic

B. Electrical

C. Nuclear

D. Chemical

The speed of light is approximately 3 x 108 m/s. How would this be written in conventional notation?

If there is an attractive force between all objects, why do we not feel ourselves gravitating toward massive buildings in our vicinity?

How many nanoseconds does it take light to travel a distance of 1.70km in vacuum?

Why is nitrogen or helium filled in a filament lamp?

If Earth orbited the Sun at the distance of Jupiter, the diameter of its orbit would be about five times greater than its actual value. Would this larger orbit affect the size of the parallactic angle measured for a given star

A world-class sprinter can burst out of the blocks to essentially top speed (of about 11.5 m/s) in the first 15.0 m of the race. what is the average acceleration of this sprinter, and how long does it take her to reach that speed?

How are primary and secondary succession similar and how are they different?

What relates the net force exerted on an object to its mass and acceleration?

I'm a wave, the medium moves parallel to the direction that the wave travels

What is the wavelength of a wave that has a velocity of 32 m/s and a frequency of 60.6 Hz?