Place the following steps in order related to an average star's life cycle: = The amount of fuel in the star becomes too low to continue to balance the pull of gravity, and the star's core begins to collapse.
= A supernova produces atoms more massive than iron and blows them into space, where they may become parts of new solar systems.
= The Big Bang occurred.
= The heat and friction from colliding hydrogen atoms initiates a nuclear reaction. The star is born
= The star will have a life that is determined by its mass.
= Gravity causes uneven masses of hydrogen to condense and swirl.
= The star grows to become a red giant as its core collapses, heats up, and fuses atoms up to the mass of iron

Part f - example: finding two forces (part i) two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).

Your friend increases her force on the desk by 30n . she doesn't change the direction of her push . what happens to the net force on the desk .will the desk accelerate

Atoms containing radioactive nuclei are called