The Parker Solar Probe is on its way to the Sun. It is the fastest vehicle humans have built. It will reach a speed of 4.3 x 10^5 miles per hour. At that speed how long would it take to reach the center of our galaxy? Assume straight-line flight from Earth. The earth is 2.5 x 10^4 light years from the center of the Milky Way galaxy. A light year is 5.879 x 10^12 miles. A year is 365.25 days.

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

What substance has a mass of 9.5g and volume of 2.1cm^3

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.