Monday, May 19, 2014

Interference!

   Hey guys, long time, no...write. Yeah, I don't know what I was trying to say there, but I'm back! Well, no time for pleasantries this evening; let's just go right in!
   Did you know that electronics can confuse some birds while migrating? No? Well, don't worry, I'll be sure to explain. Birds use Earth's magnetic field  to guide them during migrations, and recent studies have shown that the electromagnetic radiation of electronic devices can confuse a bird's "inner compass".  Think about when you are listening to your radio in the car and you drive through a certain area that interferes with the radio station and causes it to change or fade out. That is the exact type of interference that affects birds while migrating!







I hope this article has been
helpful for you guys!
Au revoir, Shoshanna!

Here's the link to the article I used for information: https://student.societyforscience.org/sciencenews-students

Tuesday, March 18, 2014

Newton's Three Laws of Motion

   Hey guys, I'm back with another post! This week, we'll be discussing Newton's Three Laws of Motion. And I think it's safe to say that we've been discussing Newton quite a bit lately. Yup, he's done a lot of stuff, and now we're doomed to talk about it every week -__-. Yeah, it can be tedious...but that's okay, I guess (not really)!

Newton's First Law Of Motion
 An object at rest stays at rest, and an object in motion stays in motion at a constant speed and in the same direction until it is acted upon by an external force. For example, if a ball is sitting on the sidewalk, it will remain that way until it is moved. Now, say someone wanders up and kicks the ball. The ball will roll at the same speed and in the same direction until an external force halts its movement(s); like it runs into a wall, or someone else kicks it in a different direction and changes its velocity.


Newton's Second Law of Motion
  When a force acts on a mass, it produces acceleration. The more mass an object has, the more force that needs to be applied to accelerate it. For example, it will take you a lot less force to move a soccer ball by kicking it than it would to kick a brick wall. You use the formula F(force)= m(mass) * a(acceleration).









(Newton's Second Law= Mo'e force, Mo'e acceleration)



Newton's Third Law of Motion
  For every action there is an equal and opposite reaction. Think of Newton's Cradle; when you let one ball fall it will hit the one next to it. Then the force will cause the ball all the way on the end of the row to swing. The ball at the other end will then swing back and hit the one next to it. The two balls at the end will continue to swing back and forth for a while.


 
Hope you guys enjoyed!
 
I'll be back soon!

Sunday, March 9, 2014

George Clooney Dies In The Beginning! Can You Guess?

   Hey guys, I'm back with another post, as promised! And if you haven't already figured out what we'll be discussing this week via my totally awesome #spoileralert title, I'll give you a hint: it's gravity! Okay, well maybe that's not much of a hint (since it's the answer), but moving on!
 



   Gravity is a natural phenomenon by which all physical bodies attract one another. Gravity is what pulls your baseball back to the ground if you throw it up in the air. The phrase "What goes up must come down" often comes to mind when discussing gravity.

   Now many of you may be familiar with Galileo Galilei's famous gravity experiment, but in case you aren't, we'll talk about it now. Galileo climbed to the top of the Leaning Tower of Pisa with two balls of different masses. He then took the two balls and dropped them at the same time from the same distance, his goal to prove Aristotle's theory that things fell faster depending on their masses false. He, of course, did, and discovered that the two objects fell with the same amount of acceleration.

   Did you know that the same day Galileo died, Sir Isaac Newton was born? This really brings that trite expression "When one door closes, another one opens" to life, doesn't it? Newton contributed greatly to the world of physics, one of them being gravity. There is a legend that Newton was one day sitting under an apple tree, and an apple fell on his head. He then began thinking "What force pulled that apple from the tree?". This is when he came up with his Universal Law of Gravitation. Part of his law states that the effect of gravity has to do with an objects mass and its distance from another object.

    Now let's stop for a minute. I've noticed that I have said the word mass quite a bit in this post. People sometimes confuse the words 'mass' and 'weight' with each other. If you are one of those people, I'll tell you the difference so you'll never have to worry or wonder again! Mass is the amount of space an object takes up, while weight is the measure of how heavy an object happens to be. Pretty simple, huh?
   Lastly, I would just like to stress just how important gravity is to us. If it weren't for gravity, we would all just float off aimlessly into space because there would be nothing to anchor us to the ground. Gravity affects anything and everything in the universe, and it keeps us on our beloved Earth.

That's it for this week! Hope this was
helpful for everyone! And go see Gravity;
it's pretty good!

Monday, March 3, 2014

May The Force Be With You

   Hey everyone, I'm back with another post! This week, we'll be discussing force. And I hope that I'm not the only person that thinks of Star Wars when I hear the word force. That would just be embarrassing. Anywho, let's get started!
   A force is a push or a pull on an object. For example, if someone kicks a soccer ball and it moves, that is an example of a push, which is force. Next comes Newtons. A Newton is an SI (System Internationale) unit used to measure force.

  Now, we'll talk about net force. Net force is when more than one force acts upon an object at the same time. So, say two people are pushing on a door from opposite sides. If the person on the right was using more force to push the door, the prevailing force would be on the right; this force is the net force.
   There is another type of force I haven't mentioned called thrust. Thrust is a mechanical force that is used to move an object through the air, and it works against the drag of an aircraft.

   Now we'll talk about something that is important in force, and that is balanced and unbalanced forces. Let's say that there is a rock on the ground. This rock is being pulled downwards by the force of gravity with 6 Newtons. But in order to keep the rock from falling through the ground, there has to be another force acting upon it, which is the normal force. This moves upward with about 6 Newtons as well and keeps the rock in place. This is a balanced force. Now for another example, let's say the rock is also being pushed by a person on the right side with a total of 3 Newtons, and another person is pushing from the left with a total of 7 Newtons. The forces are now unbalanced due to the forces from the right and left side, and the friction from the rock's right movement.

   Lastly, we'll talk about centripetal force. Centripetal force is a force that makes an object follow a curved path, and is generally the cause for circular motion. Think of a roller coaster; when the cars are forced through a loop by the tracks applying a centripetal force to them.

That's it for now, but I'll be back soon enough
Hope you all enjoyed!

Sunday, February 9, 2014

Acceleration: Punch it!

   Hey y'all, I'm back with another post! This week, we'll be talking about acceleration. Acceleration is defined as the change in velocity divided by the time it takes for the change to happen. And I don't know about you, but when I think of acceleration, I think of speeding up, but there are other way to accelerate. One, of course, is speeding up. When you speed up, the acceleration is in the direction the object is going. For example, if you are riding a bicycle, gaining speed. The next way is slowing down. Yes, slowing down. You may not believe me; when you imagine acceleration, you think of a speeding car or something of the sort, but I speak the truth. When you slow down, the acceleration is in the opposite direction of where you're going. So, think of when you press the brakes on your bike. Lastly is if you change direction. When your direction changes. you velocity changes, but you acceleration stays normal. Think of when you turn a corner on your bike. Acceleration is calculated by using the formula acceleration is equal to the final speed of the object minus its initial speed, divided by the time it took. So, if you are at the top of a hill on your bike your initial speed is 0 m/s. If you ride down the hill at 20 m/s and it takes you 10 s to go down the hill, 20 m/s is your final speed, and 10 s is your time. After you divide 20 m/s by 10 s, you get 2 m/s/s as your answer.

   Next comes positive and negative acceleration. Positive acceleration is just what you think is is; when you speed up. Negative acceleration is when you decelerate, or slow down. Lastly comes how acceleration is graphed. When the line rises, that means the acceleration is increasing. When it falls, that means the acceleration is decreasing. When it remains constant, that means you are moving at a constant speed.

Well, that's it for this week! I hope this was helpful 
for anyone who needed it!
 

Monday, January 20, 2014

Motion of the Ocean

   Hey guys, I'm back with another post! This week, we will be discussing motion, and the different types of motion!
   First and foremost, you need to know that all matter in the universe is in motion: blood circulating through your body, trees swaying in a breeze, the Earth revolving around the Sun, the moon around the Earth, and so on. You must first recognize that an object has to be in motion so you can describe the motion. Next comes relative motion. Relative motion is the calculation of a moving object with regards to a different moving object. For example, let's say that you are on a train and you look out the window. You will notice that everything around you is moving, or so you may think. In reality, the only thing that is moving is the train.

   The next thing you need to know is distance and displacement. Distance refers to how much ground an object covers during its motion, whereas displacement is the objects overall change in position. So, let's say that a baseball player hits a home run, and each base is 90 meters apart. If the player runs to all the bases and makes it back to home plate, they have traveled a total of 360 meters, which is there distance. The displacement, however, is 0 meters. Why, you ask? Well, it's because the player didn't change positions; they started at home plate, and they also ended there. Make sense?

   Now comes speed, which refers to how quickly an object is moving. It is calculated by using the formula speed= distance/time(s= d/t). Now, I know what you're probably thinking right now: Why are you telling me the definition of speed? Everyone knows what speed is. But you may not know the different types of speed, which are average and instantaneous speed. Instantaneous speed is the speed of an object at any given instant. Average speed is the average of all instantaneous speed. Say you're walking down the street, and your average speed is 3 meters per second. If you broke into a run, which added up to about 8 m/s, and ran a total of 16 meters, then went back to walking 3 m/s, the running would be your instantaneous speed. Yeah, I know, it's a bit confusing, but you'll get the hang of it.

   The final thing I will teach you is velocity, which includes the distance/time ratio, but you also need to include the direction in which the object is travelling. So instead of saying that an object is moving 49 miles per hour, you have to say that the object is moving 49 miles per hour west. The formula for velocity is velocity= distance/time(v=d/t).

Well, that's all for today, folks! Hope everyone was able to learn
something new today! Make sure to leave a comment below
and tell me what you think! 

Check Out These Facts!
Top Ten Fastest Animals In The World
1. Peregrine Falcon
2. Spine-tailed Swift
3. Frigate Bird
4. Spur-winged Goose
5. Sail Fish
6. Marlin
7. Cheetah
8. Pronghorn Antelope
9. Blue Wildebeest
10. Brown Hare

Tuesday, December 17, 2013

Isaac Newton

   Well, hello there! It's nice to see y'all again! This week I'll be telling you about one of the most influential people in science: Sir Isaac Newton.
   Isaac Newton was an English physicist, natural philosopher, astronomer, and mathematician. I know, that's a lot of stuff. He was born in Woolsthorpe-by-Colsterworth in 1643. This is the place where quite a bit of his most important discoveries and work would take place. Before any of that, however, Newton almost became a farmer! Can you believe that? While he was away studying at school, his mother ordered him back to their farm so he could learn the business. Thankfully, his headmaster managed to convince his mother to send him back to school, where he graduated later with flying colors. After, he enrolled in Trinity College at the University of Cambridge. He studied there for four years before the school was shut down in 1665 due to an outbreak of the plague.

   Newton returned home after acquiring his degree and continued studying science. This is where he was said to have seen the famous apple. He had been sitting near a window at Woolsthorpe Manor when he saw an apple fall from a nearby tree. Then, he began thinking about the force that pulled the apple to the ground; this in turn caused him to question whether the force that pulled the apple down was the same as what kept the moon orbiting the Earth, and the Earth orbiting the sun. He called that force gravity, which affects every object in the universe depending on said object's distance and mass. In 1687, he published this the law of gravitation in book called Philosophiae Naturalis Principia Mathematica, along with his three laws of motion.
   Not only did he make major contributions to physics, but he also took great strides in the field of mathematics by helping create Calculus(a type of math that helps us measure curves and irregular shapes). You know Calculus, that math that you stay awake trying to figure out until 3 a.m.?

   Then there was his work in optics, another branch of physics that deals with light properties. He refracted light through a prism and discovered that white light is actually made up of many other different colors. With this knowledge, Newton invented the reflecting telescope, which helped create a more high-quality picture.

   Later in life, he was knighted by Queen Anne for his contribution to the Royal Mint(go figure). He helped to reform English currency and find and punish counterfeiters as well. Newton became the President of the Royal Society in 1703, which was the most prestigious organization of scientists in England.
   Newton died in 1727 and became the first scientist to be buried in Westminster Abbey. Even though he is dead, his extraordinary contributions to science are still remembered and used today.

Hope you guys enjoyed that little lesson on Isaac Newton! Make sure to leave a comment in the comments section below; I'd love to here your input!