Answer:
The initial velocity of the cart was 0.91m/s.
Explanation:
When the car comes to a stop it has delivered all of its kinetic energy to the spring; therefore,

solving for
we get:

we put in
,
, and
to get:


Answer is Option C Lumen.It is also known as luminous energy.
The answer is 2. Magnetite. Hope I could help you :)
Answer:
15
Explanation:
0.15 is a decimal place after a 0, whereas the 15 is a whole number
Answer:
2000metres
Explanation:
Pressure= density x height x gravity
Gravity is always a constant = 10N/kg
so height= Pressure/( density x gravity)
h= 20000000/(1000 x10)
h= 2000 metres