. A mass of 400 g is attached to the spring and stretched a distance of 25.0 cm
from equilibrium. The mass is then released.
. At a position of 10.0 cm from the equilibrium the acceleration of the mass was
measured to be only77.00 m/s?, a good bit less than what was expected.
The students deduced that the surface the mass is sliding over must be producing
friction.
Use the information outlined above to determine the coefficient of kinetic friction, H.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

Ithink it’s cancer risk

Molybdeum(mo)orruthenium (ru)actually, elements with similar chemical properties as technetium would bemn, re, and bh. this is because elements in the same group/family (column) have similar chemical properties. elements in the same period (row) have the same number of energy levels (or shells).

Ithink the answer is d