1. An insulated Thermos contains 120 cm3 of hot coffee at 80.0°C. You put in a 19.0 g ice cube at its melting point to cool the coffee. By how many degrees (in Celsius) has your coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as though it were pure water and...
I have a general question regarding Radiation. If the net Thermal Radiation is understood to be :
Pnet = Pabs - Prad= σϵA(Tenv^4 - T^4) . How is it that Pnet is negative if the environmental temp is higher than the temp of the object?
oh good I thought I was going crazy. I was only allowed three attempts. so I used three different formats that were all the same thing.. still marked wrong.
If the phase angle for a block-spring system in SHM is φ and the block's position is given by x = xm cos(ωt+φ), what is the ratio of the kinetic energy to the potential energy at time t = 0? State your answers in terms of the given variables.
x =xm Cos(wt + phi)
v = -w(xm)sin(wt +phi)...