Recent content by lollol

I asked some "stupid" questions on here... people had to hold my hand and guide me through each question I asked. Everyone was nice about it. Well I got my MCAT scores a month ago.. and I made a: 14 on the Physical Sciences section of the test (out of 15) That's a 98.2-99.6%...

So in fact, the total mechanical energy can be negative then... it all depends on the magnitude of the values?

1) Three bricks are thrown from the roof of a building with the same speed but with different launch angles: one above the horizontal, one below the horizontal and one horizontal. Assuming no air resistance, which brick has the highest speed by the time it reaches the ground? My answer...

This is basic, basic high school physics.. and I was going through the textbook, these were just conceptual questions to think about 1) It just asked if mechanical energy can be negative 2) It simply asked if an inelastic or an elastic collision would cause more damage you're thinking...

1) I was thinking about the definitions of KE and PE... can't the values KE and PE only ever be positive...? so ME = KE + PE Can total mechanical energy ever be negative? I'm thinking it cannot 2) also let's say you're in a car and you collide with another car... I'm trying to compare...

The force exerted on 2 pistons was 10 N.. let's say Area of each piston is 2m What was the average pressure on the pistons? The word average confused the heck out of me... so I found the pressure on each... added them.. divided by 2... and got the same pressure Was I supposed to add...

area of a piston is 0.02 what is the AVERAGE pressure exerted on 2 equal pistons if the force is 25 N P = F/A do you just combine the areas.. and divide the combined area by F i just did... pressure = F/Area of 1 piston and since it said average... they both give the same...

It's thermo.. so I just posted it in the physics forums but.. a free energy diagram is supposed to represent G right? We normally conclude whether a rxn is endo/exothermic depending on whether the product is at a "lower" or higher energy than the reactants just by looking at the diagram...

I see what you're saying... so you're saying... DETERMINE whether the blood pressure is a "response" or not. If it is not a response, a narrowing of the blood vessel actually causes a decrease in pressure immediately. But because of the heart, to maintain flow, pressure will be...

Can you guys look at this question... I'm told not to mix Bernoulli with blood pressure blood vessels... but: From Berkeley Review Physics: When blood flows through an artery, it exerts pressure on the surrounding arterial wall. Compared to a section of healthy artery of equal size, a...

According to bernoullli, assuming ideal flow, if you increase the area of a tube... vessel in this case, pressure increases as well however, high blood pressure is caused by constriction of arteries... so is blood flow just not ideal then?

Going back to why 50W shines brighter than a 100 W bulb... I thought I understood this... but I am totally confused about the concept of "power" How do we know the 50 W resistor has more resistance than the 100 W resistor? If we establish this fact, I understand how we can determine...

Thanks... I see how it makes sense common-sense wise... but mathematically, can someone confirm the following: Is it because in a normal circuit with a resistors and a battery, it's a closed circuit? everything that goes out comes back. However, with transmission lines, nothing ever comes...

Assuming a simple circuit with a couple of resistors Would it just read 0 around 2 points uninterrupted by a resistor?

So what is the factor that determines "brightness"? Voltage drop? ... greater the voltage drop, the brighter the bulb is? Am I correct?