Recent content by sp00ky

A ball is thrown straigh up, from height of 25 m above the ground, at a speed of 11 m/s. The first question is what is the max. height of the ball above the ground. I got that one it's like 31m. But there was another question after that that asks how long is the ball in the air. What...

Okay well my teacher gave me this sheet where you can prepare for the test that will be the next day. The thing is that the sheet consists of questions but no numbers or anythin' so you just have to figure it out how do approach the problems. I have most of them figured out but there might be...

I'm not quite sure what are are saying here. you say that you don't jerk forward and it's that the car that jerks backwards that is why you feel this force? Also, is this Newton's first law?

Not sure exactly: 1. Why do passengers jerk forward when the car suddenly stops? I know it is somethin' relative to Newton's law but I don't know which law it is and how it actually happens. and 2. Why do the passengers feel like they are pushed to the outside of a turn.

I know step-up transformers are used for tv's, pc monitors, and in many furnace-ignition circuits, but what types of stuff are used for step-down? I know some toys does but anythn' else?

okay...and is there only 2 types of transformers? A step up and a step down is basically the types of transformers there are right?

I was just wondering how transformers actually operates. And I hear they need to use alternating current and I was just wondering why they need to do so.

oh thanks for that link. Is this right: The primary coil receives alternating current and the secondary coil basically stimulates the potential difference? Dunno if stimulates if the best word for it.

Oh okay, makes sense. But how do transformers actually operate?

Well I was learning bits about Electromagnetism in my physics class and we were learning about transformers and thought it was kind of neat. I was just wondering why transformers use alterneting current and why power must be delivered at such high voltages across transmission lines? Also, how...

1. Determine the interest rate for a principal of $150 to amount to $275 in 8 years with interest compounded semi-annually. 2. Suppose you deposit $1000 in an investment account for one year at 6%. How much more money will you receice if the investment is: compounded semi-annually instead...

Don't really understand the first part of the question. When 2 trumpets were sounded together, 6 beats were heard in 2s. If the frequency of one trumpet was 786Hz, what were the possible frequencies of the 2nd trumpet. I keep on gettin' 3+Hz but don't know if it's right.

A saling ship is traveling in the North Atlantic at night. The captain is worried about ice bergs, but has no radar. The captain sounds the ship's horn and hears the echo 2.4s later. If the air temperature is -10degrees Celsius, how far away is the iceberg. I think I know how to do it but...

Haha Thanks soo much prasanna:) I love you!

I don't know if this is a math question, but my math teacher gave this fun sheet to me but I have no idea to do it because I have no idea what it is asking. Maybe someone can help me out: You can change one letter on each step, and each step has to contain a "real word". You can move up or...