What are results from High Blood pressure?

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

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?