Recent content by Lauren0619

Cool! And just to be sure, this is in kilograms, right? I wasn't sure if there was a conversion that I needed to do that was missing. Also, I redid the conversion to solar masses from kilograms and got .93Ms.

Thanks gneill! I redid the calculations. You were right. For my average I got 3.13x10^18. I plugged that into the formula to calculate mass and got 1.85x10^30 kg. Is this correct?

Homework Statement I have to find the mass of 55 Cancri in kg using the average orbits of 3 orbiting planets. Specifically, "Using the average of the values of R^3/T^2 that you filled in just for planets c, f, and d in #2, approximately what is the mass of 55 Cancri in kg? planet c = 3.14 x...

That was a silly mistake on my part. Thanks for catching that. My answer in full is 473666.6 which converted into scientific notation will result in a complete answer of -4.73x10^5 or should I round it up to -4.74x10^5? Again, thanks all for the patience.

Thanks everyone! I redid my conversion and got 25.3 (rounding up) for my meters per second. Recalculating I got 4.73 x 10^4. Keeping 4.73 consistent with 3 significant figures. And I will mark it as negative since it is decelerating. Did I finally get it?

Trailing zeros are significant, so 3 sig figs are in 91.0. So converting to m/s it would be 25.0 m/s? So then my answer should be -4.62 x 10^4 retaining the 3 significant figures? Thanks again for being helpful and patient.

Thanks for your quick reply, TSny, For the significant figures and multiplication I know that you use the value with the least amount of numbers (precision). So for this one would I be basing it off of .5? or 25? If it was .5 I would write it as 4x10^5. If it was 25, I would write it as 4.6 x...

Homework Statement With brakes fully applied, a 1480 kg car deccelerates from a speed of 91.0 km/hr. What is the work done by the braking force in bringing the car to a stop?[/B]Homework Equations 1/2(mass)(v^2) The Attempt at a Solution 1/2(1480)(25^2) = 462500 I converted km/hr to m/sec to...

Doc Al, Thank you for your very helpful quick reply. I redid Question 5 and got E) for my answer. I have one more question pertaining to this problem set: Homework Statement We are told the block reaches a max speed of about 30 mi/h at the bottom of the ramp. Use question 5 to calculate the...

I am hoping that I can have someone look over my answers. I have provided what I think is necessary to be appropriate posting, including the questions and attempts at all my answers. I would just like some feedback that I am correct in my answers. Thank you! This is an overview that all the...

I am wondering if this is an appropriate place to ask people to check my homework answers? I am willing to type up the problems and my answers to see if they are right and to get additional suggestions, I just want to make sure this is a place I can do that. If it's not, does anyone know of a...