11/13 HW

Milk has a low viscosity because it is relatively thin.
Molasses as a high viscosity because it is relatively thick.
Water is good flow because it is less vicious making for a greater ease of movement.
Honey has bad flow because it is more vicious making for a tougher ease of movement.

HW 11/8

iPhone: A solid that is hard, not flexible, dark, light, bounces only when dropped from high distance.

Computer: Hard, bendable only at the hinges of the screen, bright, light, not sure if it bounces but I do not want to find out. Most likely not.

Desk: Hard, heavy, strong, not bendable.

Plastic Trash Can: Firm, but bendable, bounces, light.

Coffee Cup: Hard, not bendable, breakable, light.

10/6 Homework

3. There would be no difference because the tires would still be propelling the car at the same speed. In other words, the tires would still be spinning, and reading on the speedometer, an accurate speed regardless of the tire size.

11. When you accelerate you are putting force in the opposite direction of where you are going. So as the wheels turn to propel you forward, it pushes the car up. When braking, all of the force that you have when traveling is in the your front direction so the brakes try and absorb that force thats headed forwards. This causes you to lean in the direction of the force vector. It depends the force your exerting and in what direction. accelerate=force upwards break=force downwards. 

14. The ramp would reveal that the two have different masses. The solid one would have a greater mass than the hollow one, which would be evident by placing them on the ramp.

HW 8/31

Title: Skateboard Lab

Procedure:

After dividing into two groups, we volunteered ourselves for the following jobs: Timer, (7) skateboard rider, (me) data collector, (1) and pusher (1). we drew chalk lines on the pavement exactly two meters apart on a down slant of approximately 10-15 degrees. Each timer stands with their stop watch a one of the chalk lines so that all seven of them are at a line. The skateboarder then sits on the board so as to stay balanced behind the first line. The pusher then pushed the skateboarder ever so slightly so as to not make him/her accelerate too fast. After the front of the skateboard passes each chalk line, that timer will stop. The data collector will then record all of the times that the timers have. Repeat this procedure multiple times to obtain more accurate data.

8/26 Homework

1. Inertia is the property of things to resist changes in motion. 
i. A baseball accelerates quickly and then gradually slows down; however, when intercepted by a catcher it stops the force of the baseball. The player needs the glove to stop the force without injuring the hand.
ii. The inertia in the whole toilet paper roll is greater than the force that is created when you rip off just one piece. This is why you can rip off just one piece without taking the whole roll.


2. Newtons First Law does apply to the sun and the moon because they are continuing in their states of uniform motion in a straight line, which have forces impressed upon them causing them to deter from a straight line. The force which causes them to deter is the pull of gravity. 


3. Net force is The vector sum of forces that act on an object
i.Two people that are arm wresting and their hands are not moving making the net force=0
ii.In the same match, one competitor is much more resilient and slams down the others hand.


4. The object will be stable, and not moving.


5. The atoms that make up the seat and desk are able to take the force that i exert on them.

8/24 Homework

Short Time: Attoseconds are the most interesting to me because of this fact that I found: "For context, an attosecond is to a second, what a second is to about 31.71 billion years, or twice the age of the universe." (http://en.wikipedia.org/wiki/Attosecond)


Long Time: Petasecond


Small Distance: Zeptometer


Large Distance: Yottameter