Determine the mass of the object below to the correct degree of precision. 272.83 g 272.9 g 272.90 g 272.94 g

How many neutrons does plutonium -196 with an atomic number of 78.

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.

In general what determines whether atoms will form chemical bonds?