A block of mass m = 45 kg sits on an inclined plane that makes an angle of 22 degrees with respect to the horizontal. What is the minimum value of the coefficient of static friction so that the block does not slide?

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?

In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic

The smallest particle of an element that retains its identity in a chemical reaction. true or false