Recent content by Chad Jensen

The answer was correct, but for some reason it wanted it in scientific notation. 2.63*105 It has never mattered before if it was scientific or regular, it must just have been a fluke. Thank you

I put the comma in for clarity when I posted to the forum. I didn't use one when I input the answer. I just thought maybe I missed something but it doesn't sound like I did. Thank you

Homework Statement What is H, the rate of heat absorbtion by an air conditioner with an EER of 8.3 that operates at 1800 W? Recall that 1Btu=1055J. Express your answer in joules per minute. Homework Equations H/P=EER The Attempt at a Solution H=EER*P H=(8.3 BTU/HR/W)*(1800 W) H=(14,940 BTU...

This drove me nuts as well. I read it as how much can you bring to boiling point. Not how much can you vaporize. I am glad I found this.

So how does laser calling work? I was under the impression they could use lasers to cool an object with no physical contact. https://en.m.wikipedia.org/wiki/Laser_cooling

Thank you for your answer. I did do a forum search and I worded my question poorly. I was aware of not being able to get to absolute zero. I was just wondering on the possible why. I will see if I can search a bit deeper and dig up the why.

Just a general musing. Could absolute zero ever be physically possible or is it like the speed of light but for an inverse reason? The speed of light take infinite energy to achieve. So therefore is impossible because the energy put into the system adds mass. This is not noticeable at slower...

Oh ok. That makes more sense. Thank you so, it is rad/s^2 which rads are considered dimensionless so they can be eliminated with no need to cross multiply or subtract to make them go away. You are then left with 1/s^2. Thank you I knew I was missing something simple. I looked at the formula...

Homework Statement Not really a homework question but a question about units that I can't figure out. Homework Equations Torque units = N*m N=kg*m/s2 I units = kg*m2 a units = m/s2 Now my formula sheet says T=Ia The Attempt at a Solution torque=kg*m/s2*m=kg*m2/s2 Ia=kg*m2/s2*m/s2=kg*m3/s2...

Thank you for the excellent answers. I really appreciate it. I have a hard time right now with using variables and setting up the correct formula. It is easier right now to see numbers because I know where they need to go most of the time. With variables, I have a hard time knowing what goes...

Homework Statement I am studying for a test and am struggling with this question on the practice exam. The answer is 9.9 I am not sure how she got to the answer though A hoop of mass 300 g. and a radius of 20 cm rotates about an axle at the edge of a hoop. The hoop starts at highest...