The most common isotope of uranium has an atomic number of 92 and mass number of 238. If a uranium atom alpha decays and emits a helium nucleus, what will the atomic number of the daughter nucleus be?.

The star nearest to our sun is proxima centauri, at a distance of 4.3 light-years from the sun. how far away, in km, is proxima centauri from the sun?

You are your friend move a new refrigerator into his kitchen. you apply a horizontal force of 252 n in the negative x direction to try and move the 56 kg refrigerator. the coefficient of static friction is 0.61. (a) how much static frictional force does the floor exert on the refrigerator? give both magnitude (in n) and direction. magnitude n direction (b) what maximum force (in n) do you need to apply before the refrigerator starts to move?

Aforce of 500.0 is represented graphically with its tail at the origin and the tip ointed in a direction 30.0° above the positive x-axis. what are the x- and y- components of the vector?