Hi there!
Assuming the track is frictionless:

Cancel out the masses and rearrange to solve for velocity:

Plug in the given height and let g = 9.8 m/s²:

Answer:
Use the formula ∆H = m x s x ∆T to solve.
Explanation:
Once you have m, the mass of your reactants, s, the specific heat of your product, and ∆T, the temperature change from your reaction, you are prepared to find the enthalpy of reaction. Simply plug your values into the formula ∆H = m x s x ∆T and multiply to solve.
Answer:
15.98 kg/s
Explanation:
Due to some of the required symbols and for better understanding of the solution the explanation is all hand written and attached below
Answer:
just find the answer in Google because I post it into Google
Answer:
T = 0.638 s
Explanation:
vmax = Aω
ω = 7.02/0.713 = 9.8457 rad/s
T = 2π/ω = 2π/9.8457 = 0.63816