After skateboarding through the mall, Joey picked up his board and headed home. "Ouch!" he yelped, "these wheels are hot!". What caused the wheels on Joey's skateboard to warm up?

How do refracting telescopes magnify a far away image? a. by directing light beams to meet at a focal point b. by absorbing light beams’ wavelengths c. by forcing light beams to change direction d. by measuring light beams’ velocity