What is the best definition of renewable resources?
A. A resource that will be used up.
B. Energy that can never be destroyed.
C. A resource that can be replenished.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring