Based on the image how many protons does carbon have

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?