A rock on the oldest Hawaiian island is found to around 65 million years old when using two different dating techniques.
One group of scientists used Sm-146 and found about 95%
of the element had decayed over that time frame. A separate
group used potassium-40 and found only about 10% of the
potassium had decayed over that same time frame. What
could cause these two measurements to be different? How could these two different elements date the same rock to
the same age?

Fossil fuels are organic compounds that are made from

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.