Tim can type 2000 words at a speed of 50 words per minute Bob’s typing speed is 80 words per minute. How much less time did Bob take than Tim to type 2000 words? _ min

Which of the following correctly describes the early view of catastrophism?

What is the scientific definition of energy that relates to work

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?