Abaseball was thrown with an initial velocity of 14 m per 2nd at an angle above the horizontal. it remained in the air for 2 seconds

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

Which atomic model was proposed as a result of j. j. thomson’s work?

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?