Answer:
1.92 m/s
Explanation:
Velocity is defined as the distance moved per unit time with consideration of the direction. The direction aspect differentiates speed from velocity since for speed, we don't need to consider the direction.
Distance moved for circular path is equal to its circumference and the circumference is given by where r is the radius and substituting
for d then
Substituting 5.5 m for r and 18 s for t then
To the nearest hundredth, the velocity is 1.92 m/s
Answer:
-24.76 kJ/mol
Explanation:
given,
mass of solid magnesium burned = 0.1375 g
the temperature increases by(ΔT) 1.126°C
heat capacity of of bomb calorimeter (C_{cal})= 3024 J/°C
heat absorbed by the calorimeter
heat released by the reaction
energy density will be equal to heat released by the reaction divided by the mass of magnesium
Energy density =
Energy density = -24.76 kJ/mol
heat given off by burning magnesium is equal to -24.76 kJ/mol