Molecular Physics | Thermodynamics Answers

A 2.5kg of water at 65 degree celsius is added to a 45kg of water at 8 degree celsius. What is the final temperature of the mixture?

The specific heat of Zn is 0.096 cal./g C. Determine the energy required to raise the temperature of 250 g of ZN from 20 degree C to 150 degrees C

How much heat energy is required to raise the temperature of 0.365 kg of copper from 23.0 ∘C to 60.0 ∘C? The specific heat of copper is 0.0920 cal/(g⋅∘C) .

consider a nosiy channel, which has a bandwith of 400khz and theoretical channel capacity of 4.01 mbps, according to shannon capacity formula, what the signal power recieved at the receiver end if the noise power is 0.001watt
also calculate the signal to noise of the channel in dB (SNRdb)

I have a few questions in regards to physics, heat, and temperature

1. How much energy must be removed from 5.5 kg of liquid lead at 327oC to produce a block of solid lead at 327C.

2. How many KJ of energy is required to melt exactly 100g of ice initially at -4.00C? Assume no loss of energy to surroundings.

Thank you

Hi, I have multiple questions on Physics, as I am struggling at physics. These are my questions.
1. A hot block of iron does 50 kJ of work on a cold floor. The block of iron also transfers 20 kJ of heat energy to the air. Calculate the change in energy (in kJ) of the iron block.

2. A chef vigorously stirs a pot of cold water and does 150 J of work on the water. The water also gains 75 J of thermal energy from the surroundings. Calculate the change in energy of the water.

And can you guys please tell me how do you calculate it and what theory applies to me and all the other basics.
Thanks

where V23 
3.00V1, n moles of a diatomic ideal
gas are taken through the cycle with
the molecules rotating but not oscillating.
What are (a) p2/p1, (b) p3/p1,
and (c) T3/T1? For path 1 : 2, what
are (d) W/nRT1, (e) Q/nRT1,
(f) Eint/nRT1, and (g) S/nR? For
path 2 : 3, what are (h) W/nRT1,
(i) Q/nRT1, (j) Eint/nRT1, (k)
S/nR? For path 3 : 1, what are
(l) W/nRT1, (m) Q/nRT1, (n)
Eint/nRT1, and (o) S/nR?

At the intersection of the Figure below, a yellow subcompact car with mass 950 kg
traveling east collides with a red pickup truck with mass 1900 kg that traveling north and
ran a red light. The two vehicles stick together as a result of the collision, and the
wreckage slides at 16.0 m/s in the direction 24.0o east of north y (north). Calculate the
speed of each vehicle before the collision. The collision occurs during a heavy rainstorm;
you can ignore friction.

The wall of a house consists of two 125 mm thick brick walls with an inner cavity. The inside wall has a 10 mm coating of plaster, and there is a cement rendering of 5 mm on the outside wall. In one room of the house the external wall is 4 m by 2.5 m, and contains a window of 1.8 m by 1.2 m of 1.5 mm thick glass. The heat transfer coefficients for the inside and outside surfaces of the wall and window are 8.5 and 31 W/m2K respectively. The thermal conductivities of brick, plaster, cement, and glass are 0.43, 0.14, 0.86, and 0.76 W/mK respectively. Assuming that the resistance of the air cavity is 0.16 m2K/W, neglectign all end effects, and neglecting radiation, calculate the proportion of the total heat transfer which is due to the heat loss through the window.