In a system with no friction what is the mathematical relationship between kinetic and potential energy? 1. As potential Energy increases, kinetic energy increases
2. Potential and kinetic energy are always the same
3. As kinetic energy increases, potential energy decreases

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?

Explain what will happen if decomposers were apsent from a forest ecoysystem.

A1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. what is the magnitude of the friction force required to keep the car from sliding?