the beach!

After school on Friday my friends and i went to walls to boogie board! we didn't get there till like 5:00 though cuz we stopped at my friends house and then we got acai. but we were really excited to go boogie boarding. i haven't done that in a long time. but we got there and there was absolutely no waves. and there were also no people on the beach. it was so weird it was the emptiest I've ever seen walls during the day. so since there were no waves to catch, we just floated out past the end of the wall on our boards and relaxed. here comes the physics! the water was super clear so we could see the reef and everything. one of my friends kept asking if the bottom was shallow enough to touch because it looked really close. I then tried to touch it but found it was actually pretty deep. and i was like "hey it's refraction!" The reef appeared closer to us than it actually was because light travels slower in water. Since it was getting pretty late, the sun was really low and a lot of it's light was reflecting off the water. One of my friends was like "I could use some polarized sunglasses right now." Polarized sunglasses would have blocked the glare on the water with a horizontally aligned filter because the light rays that were reflected of the water were only vibrating horizontally. yeah so that was my physics experience of the day. yay.

Iron Man!

haha so this weekend my friends and i saw iron man even though i wanted to see harold and kumar. but iron man was pretty cool and it had a lot of physics in it; it probably wasn't all realistic though. so first of all something happened to tony stark and he got metal shards in him that was affecting his heart or something so this scientist guy put an electromagnet inside of him to make his heart keep beating. i got excited when i saw that cuz i was like "oh we learned about electromagnets!" hmm what else there was a lot of action reaction stuff. like iron man was able to fly by making his shoes propel off the ground. and the metal his suit was made out of must have been super strong because it was able to withstand bullets and explosions and all that stuff. tony stark said that iron man wasn't a precise name because his suit wasn't actually made out of iron. also all those big explosions propelled people backward because there was a lot of force acting upon them. there were probably more specific examples but i can't think of them right now but if i do i'll update this later. here's a picture!