1. A rocket is fired vertically from the launch pad with a net accelevation of 20m/s². If the atmosphere is
approximately 100km thick and considering that the
acceleration is constant
a) what is the time it takes for the rocket to leave the
atmosphere?
b) What speed does the rocket reach at that time?

Max height= 36000 meters

Total Time = 120 seconds

Explanation:

0 = U - at

U = at

U= 20*60

U= 1200 m/s

MAX altitude would be

(U²Sin²tita)/2g

Max height= 1200² *( SIN90)²/(2*20)

Time of FLIGHT

2 * 1200/20

2400/20

120 sec onds

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it