Search it up and there’s a video of how to make spectroscope.
Answer:
50 to 70 ft tall
Explanation:
if it landed that fast the building couldn't have been that tall
Answer:
1500 J
Explanation:
Apparently, we're to assume that no energy is lost to friction or other effects. Then all of the energy the train has is due to work being done on it.
1500 J of work was done on the train
1) Speed acquired
The time taken for the motion is
The bus is moving by uniformly accelerated motion, with constant acceleration
, so the speed acquired by the bus after 120 s is
2) The distance traveled is given by the following formula:
where a is the acceleration and t the time. Substituting numbers into the equation, we find