Recent content by Meeeessttteeehh

Homework Statement If a car has an emergency breaking system that can be pulled by the driver, which will decelerate the car at a rate of -4.0m/s^2, how long does the driver have to react before it is too late. (If she enters the intersection at all is it too late?) Homework Equations No idea...

I see. Its not just me that confused! What a relief. Thanks!

Homework Statement Homework Equations None, just right hand rules. The Attempt at a Solution Can anyone verify that this looks alright? These things are so confusing! Thanks :)

Oh jeez. Can you tell I'm tired? I just double checked the assignment, it is in fact Ohm's and the watts in the question was an error in my typing. Thanks for catching that!

Ohhhh, so the cost of the lights plus the cost of the coffee. Got it! Everything else seem right?

Had a bit of a hard time with this one. Anyone mind giving it a look over? 1. Homework Statement Find the total cost for a business that operates the following for one year. Assume that the rate is 6.4₵/kWh. · Fifteen 100 W light bulbs for an average of eight hours a day. ·...

Okay, thanks for the input guys! I wrote this: Sound reasonable?

I'm not sure what you mean by differential equation... we weren't taught any equations... I talked to my teacher and he said something confusing about the 52% and such. Basically I understood that I cannot multiply the 5730 by 0.52 because that's only half of the half... If I multiply it by 0.96...

Homework Statement Carbon-14 testing on the body of the Iceman showed that the level of carbon-14 was at 52%. In approximately what year did he die? Homework Equations We have been given no equations, and the course work is vague. We have to make charts... (grade 11) The Attempt at a...

That's an interesting point. Is it safe to assume the zero was at the bottom you think?

Thanks! No to the air resistance, I forgot about that... should I add it in? Or would it be "out of place" as I was taking about energy and air resistance isn't a type of energy? As for the conversion, the numbers suggest that the majority is converted to kinetic, but I guess this requires more...

Homework Statement A skier with a mass of 45 kg is standing at the top of a 45 m hill. · Calculate the gravitational potential energy of the skier when she is standing at the top of the hill · Calculate the kinetic energy of this skier at the bottom of the hill, where she has a...

Why thank you! Yes, the picture is mine, but I did find the original it is based off of on the internet and therefore cannot take full credit. I eliminated the normal force, and calculated the force of gravity to find the net force, and the acceleration! Using this, I answered the last question...

Homework Statement An elevator that contains three passengers with masses of 72 kg, 84 kg, and 35 kg respectively has a combined mass of 1030 kg. The cable attached to the elevator exerts an upward force of 1.20 x 104 N, but friction opposing the motion of the elevator is 1.40 x 103 N. ·...

OH MY GOODESS. I just got the E 18 degrees N after drawing a million more triangles (more like 8 but still), but I can't believe I forgot the tan inverse. THANK YOU SO MUCH!