If an unbalanced force acts on an object, which of the following could change? i. its mass ii. its density iii. its speed iv. its direction of motiona.  iii and iv only  b.  i, ii, and iii only  c.  i and iii only  d.  i and ii only

What is the relationship between the wavelength of a wave and it's energy?

You win the lottery and decide to impress your friends by exhibiting a million-dollar cube of gold. at the time, gold is selling for $ 426.60 per troy ounce, and 1.0000 troy ounce equals 31.1035 g. -how tall would your million-dollar cube be? en cm

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final