Which diagram represents an object at static equilibrium? a. a b. b c. c d. d who knows the real answer to is it really d?

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?

How many neutrons does an element have if its atomic number is 50 and its mass number is 166

Ajar contains a certain substance. which observation would show that the substance must be either a solid or a liquid?