pupils in a school prepared a circular flower garden of a radius 28m they dug holes each 2meters apart along the circumference for planting flowers how many holes were dug.​

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?

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these

To calculate the molarity of a solution, you need to know the moles of solute and the