Scientists use this part of the electromagnetic spectrum to diagnose broken bones. x–rays infrared waves gamma rays ultraviolet waves

X-rays are used to identify broken bones

XRays (I answered this on my test, and got it correct!)

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

you can cut your hand off if your not