Water at room temperature, 20°C, is pumped into a reactor core where it is converted to steam at 200°C. How much heat (in J) is transferred to each kilogram of water in this process? (csteam = 2 010 J/kg/°C; LV,steam = 2.26 × 10^3 J/g; 1 cal = 4.186 J.)
a. 3.35 × 10^5
b. 7.53 × 10^5
c. 2.67 × 10^6
d. 2.80 × 10^6
e. 3.01 × 10^6
d
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Addition by 1. Components: Two boys, Joe and Sam, who are searching for buried treasure start underneath the same tree. Joe walks 12 m east and then 12 m north, while Sam walks 15 m west and then 10 m south. Both boys then stop. Find the magnitude and direction of the vector from Sam to Joe. Express the direction of this vector by specifying the angle it makes with the west-to-east direction.
What will be an ideal response?
An Atwood machine consists of a mass of 3.5 kg connected by a light string to a mass of 6.0 kg over a frictionless pulley with a moment of inertia of 0.0352 kg ? m2 and a radius of 12.5 cm
If the system is released from rest, what is the speed of the masses after they have moved through 1.25 m if the string does not slip on the pulley? A) 2.0 m/s B) 2.3 m/s C) 4.0 m/s D) 5.0 m/s E) 6.0 m/s
The peak voltage of an AC source is 400 V. What is the rms voltage?
a. 100 V c. 141 V b. 200 V d. 283 V
When water of mass m and specific heat c is heated from absolute temperature T1 to absolute temperature T2, its change in entropy is
a. cm ln(T2/T1) b. cm (T2/T1) c. cm (T2 - T1)/T1 d. cm (T2 - T1)/T2 e. cm (T2 - T1)/(T2 + T1)