Kay D. Anderson

The soul would have no rainbow had the eyes no tears. John Vance Cheney

What is the gravitational acceleration at a distance of R/2 from a the center of a planet?

  1. Given that the radius of the first planet is R = 2.87 x 10^6m and M = 6.02 x 10^24 kg. The idea is the radius is reduced in half and we now have to calculate a new gravitational acceleration. I would appreciate the help on this... I don't even think it's necessarily a killer problem just stumped. Thanks!

    Answer by lunchtime_browser
    The gravitational force (F) between two masses (M and m) separated by a distance R is given by: F = GMm/R² When one of the masses (M) is a planet and the other mass (m) is a small object near the surface of the planet, we have a special name for that gravitational force: we call it the weight of m. Weight = mg where g is the acceleration due to gravity. So we can write: mg = GMm/R² m cancels out, leaving: g = GM/R² The rest is just plugging in the numbers. EDIT: Just reading your question again. It's not clear how the "new" planet comes about. The new radius, Rn, will obviously be R/2 = 1.435 * 10^6 m, but how is this being achieved? Is the same mass M being compressed into the smaller volume, so that the density of the smaller planet is increased, or is the planet just made up of less "stuff" than the first planet (but at the same density) in which case the new planetary mass Mn will be smaller: {Mn = M/8} ?

  2. W = F * delta r Just curious what lower case r stands for? It's beginning college physics to answer your question, I never took physics and high school. I don't care much for my professors teaching methods but that makes more sense so essentially all I'm looking at is a simple formula to measure the work based off of force and distance. I think I got it thank you for your input.

    Answer by †Archangel TJ†
    if it's high school physics. W = work. F = force , delta r = distance moved

  3. 8^2- r^2=r(8)+43 solve for r. I set it up like this, 64-r^2=8r+43 but I don't know how to solve for r since its squared. Please show the steps you took to get r=?

    Answer by Me
    64 - r^2 = 8r + 43 move all terms to 1 side r^2 + 8r - 21 = 0 use discriminant method to solve r = -4 +/-sqrt(37)

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Look at this – Everything You Need To Know About Retirement

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If you suffer from eczema, try not to sweat too much. Of course, certain sweating cannot be avoided. But, it is important to try to keep the skin cool. If you do sweat, say from a workout or a jog, be sure to take a shower as soon as you are done. Moisturize immediately following bathing. This is the best time to do it because your skin is still damp. Make sure to only pat dry your skin between showering and moisturizing. You don't want to remove any moisture that your skin has already absorbed; that is counterproductive to treating your eczema.Pay attention to your hands. Because you wash them throughout the day, they can get very dry and are prone to more eczema. If you are engaged in an activity that involves water, like washing the dishes, wear rubber gloves. This will help protect your skin from the water throughout the day. Know what your triggers are so you can avoid them. Your triggers may laundry detergent, soaps, and dust. You should probably Start Reading Whole Lot More

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Child rearing may be one of the toughest challenges any person will have to go through. By following the techniques listed in this article, you too can train your children to become responsible. Doing so can make you a better parent.When your child is acting up, trying giving them a second chance instead of punishing them right away. This can be done by simply asking your child to "please make a different choice. This allows your child to correct himself or herself and avoids the negative feelings resulting from more forceful discipline. Using rules that detail exactly what is expected can help to cut back on the amount of fighting that goes on and ultimately help your children live together more harmoniously. Instead of saying "no hitting" you could tell your children to "touch gently", as it is a kinder way of saying the same thing.Teach your young child how to organize by providing specific places for him to put away his things. Toys and arts and Start Reading Whole Lot More

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What I presume – Learn To Grow Like A Pro: Organic Gardening Advice

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Nine Suggestions – Have You Heard About Forex? You Could Be Making Money Online Easily.

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Solutions ! – Try Some Of These Great Tips For Forex Trading

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