Recent content by Manda_24

Thanks for your help, I finally got it

We finally talked about this a little in class today, I think. The teacher put up an equation for radiation. Iemitted=Q/t=eA(sigma)T4 Is this part of what I need to use to finish the question? I know what sigma is and e but I don't know what A is.

Homework Statement Estimate the temperature of Mars. Assume Mars acts as a perfect blackbody and the only heat input comes from the Sun (use necessary values from appendix) Homework Equations The Attempt at a Solution I was doing so well until I got to this question on my...

Thanks, I just needed to convert the top to pascals, I thought I only had to do it to the bottom.

Homework Statement At the surface of a freshwater lake the air pressure is 1 atm. At what depth under water in the lake is the water pressure 4.5 atm?Homework Equations P=a+hgp h=(P-a)/(g*p)The Attempt at a Solution h=(4.5x105 - 1x105)/(9.8*1000)=35.71 I also did the equation with 9,000 Pa...

Thanks, that was right. My TA told the class that this one was just like one of our other problems but it isn't, that was part of my problem.

Homework Statement A nurse applies a force 4.35 N to the piston of a syringe. The piston has an area of 5.99x10-5m2. What is the pressure in the fluid within the syringe? Answer in kPa. Homework Equations mg/2A=\DeltaP The Attempt at a Solution 4.35/2*5.99x10-5= 36310.518 Pa...

Thanks, that helped.

Homework Statement A crate of mass 27 kg is pushed up a ramp by a person, as shown in the figure below. Assume the coefficient of kinetic friction between the crate and the ramp is .24. Calculate the work done by the person in pushing the crate a distance of 30 m as measured along the ramp...