Farrell built a circuit that only allows one route for the current to move. What kind of circuit did he build? D A a parallel circuit
B
an open circuit
с
a series circuit
D
a short circuit

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

The ozone hole appears in antarctica during

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?