The first spring has the stiffness -> 10 N/cm the second has the stiffness-> 2 N/cm

They're now put together that they are one whole spring.

calculate the spring stiffness of the newly created spring

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

In order of decreasing light-transmitting capabilities of materials, which is the correct sequence? a. transparent -> translucent -> opaque b. opaque -> transparent -> translucent c. opaque -> translucent -> transparent d. translucent -> transparent -> opaque

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?