# science

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Which object exerts more gravitational force, object A with a mass of 25 grams and a density of 2 g/cm3 or object B with a mass of 55 grams and a density of 0.5 g/cm3?

• science -

At the same remote distance, the larger mass alters the gravitational field the most, and "exerts" more force.

• science -

what cause breast cancer?

• science -

Ashley, you get better response posting new questions.
There are many people trying to find out what causes breast cancer.
There are several different kinds of breast cancer. Some have a genetic link to the mother, most do not appear to be genetic.
Some may be triggered by pollutants, or foods, but the important word here is "may".
But in general, we don't know. There are some known risk factors, and you can read about those.
Now if you are worried about yourself, you need to get a trusted adult to go to your doctor with you, and discuss this. I remember when my wife contracted breast cancer in 1995, it worried my two teen daughters, and my 10 year old daughter, a lot, and frankly scared them. So it you are in this situation, get the facts from someone who knows, do not rely on rumors or "common" knowledge.
Here are some sites you can read more:

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