The mass on the spring is bouncing.
We would call it a wave-like motion, except that it all stays in the same place. But, just like a wave, moving from the highest position to the lowest position
is one-half of a full wiggle.
(The other half consists of moving from the lowest position back up to the
highest position, where it started from.
So, half of the wave-like motion takes 0.6 seconds.
A full cycle of the wave motion ... the actual period of the bounce,
is double that much time . . .
1.2 seconds.
Answer:
Thermodynamics is a branch of physics which deals with the energy and work of a system. It was born in the 19th century as scientists were first discovering how to build and operate steam engines. Thermodynamics deals only with the large scale response of a system which we can observe and measure in experiment.
Answer:
-3,89
Explanation:
First to consider is that the reaction is raising the temperature of the solution, so it's an exothermic reaction.
The enthalpy can be calculated by the following equation:
![H=m*C_{p} *ΔT](https://tex.z-dn.net/?f=H%3Dm%2AC_%7Bp%7D%20%2A%CE%94T)
First we need to calculate the mass using the density and the volume:
⇒ ![m=d*V](https://tex.z-dn.net/?f=m%3Dd%2AV)
![m=250[mL]*1,25[\frac{g}{mL}]=312,5 [g]](https://tex.z-dn.net/?f=m%3D250%5BmL%5D%2A1%2C25%5B%5Cfrac%7Bg%7D%7BmL%7D%5D%3D312%2C5%20%5Bg%5D)
Then we have Cp = 3,74 Joules/gram°K ΔT = -3,33 °C (cause of exothermic reaction)
Replacing in the formula:
![H=312,5*3,74*(-3,33)=-3891 [J]=-3,81[kJ]](https://tex.z-dn.net/?f=H%3D312%2C5%2A3%2C74%2A%28-3%2C33%29%3D-3891%20%5BJ%5D%3D-3%2C81%5BkJ%5D)