1. What is the most probably the value of standard atmospheric pressure at sea level?a. 764mmHgc. 1.038kg/cm?b. 29.92in-Hgd. 14.6psi2. A stone is thrown vertically upward with an initial velocity of 10m/s in a diving cliff 25m abovethe water level. Determine the velocity of the stone as it hits the water.c. 24.3002m/sa. 23.0573m/sb. 24.7006m/sd. 25.0946m/s3. An electric kettle was used to heat a 1kg of ice at freezing point. Determine the heat needed (kJ)just to bring the temperature of the water to its boiling point.c. 795.57kJd. 833.253kJa. 875.123kJb. 753.7kJ4. Estimate the Specific Gravity of a solid log having a mass of 200kg, an square cross sectionalside of 20cm and a length of 10m.a. 0.4339b. 0.4132c. 0.2959d. 0.39445. The barometer of a mountain hiker reads 14.7psi at the beginning of a hiking trip and 12.8psi atthe end. Neglecting the effect of altitude on local gravitational acceleration, determine the verticaldistance climbed. Assume an average air density of 1.20 kg/m³.c. 1250.4535md. 1190.9081ma. 1112.5067mb. 1229.6126m6. Ice at -20°C has been brought to an insulated container containing 2kg of commercial tungstenhaving an specific heat of 138J/kg-K and a temperature of 78°C. If equilibrium was attained at25°C, determine the mass of the ice placed in the container.a. 30.3779gramsb. 29.6058gramsc. 31.1184gramsd. 29.9868grams

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1. What is the most probably the value of standard atmospheric pressure at sea level? a. 764mmHg b. 29.92in-Hg c. 1.038kg/cm? d. 14.6psi

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 29RQ: If 3000 ft3 of air is crossing an evaporator coil and iscooled from 75F to 55F, what would be the...

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Question

1. What is the most probably the value of standard atmospheric pressure at sea level?
a. 764mmHg
c. 1.038kg/cm?
b. 29.92in-Hg
d. 14.6psi
2. A stone is thrown vertically upward with an initial velocity of 10m/s in a diving cliff 25m above
the water level. Determine the velocity of the stone as it hits the water.
c. 24.3002m/s
a. 23.0573m/s
b. 24.7006m/s
d. 25.0946m/s
3. An electric kettle was used to heat a 1kg of ice at freezing point. Determine the heat needed (kJ)
just to bring the temperature of the water to its boiling point.
c. 795.57kJ
d. 833.253kJ
a. 875.123kJ
b. 753.7kJ
4. Estimate the Specific Gravity of a solid log having a mass of 200kg, an square cross sectional
side of 20cm and a length of 10m.
a. 0.4339
b. 0.4132
c. 0.2959
d. 0.3944
5. The barometer of a mountain hiker reads 14.7psi at the beginning of a hiking trip and 12.8psi at
the end. Neglecting the effect of altitude on local gravitational acceleration, determine the vertical
distance climbed. Assume an average air density of 1.20 kg/m³.
c. 1250.4535m
d. 1190.9081m
a. 1112.5067m
b. 1229.6126m
6. Ice at -20°C has been brought to an insulated container containing 2kg of commercial tungsten
having an specific heat of 138J/kg-K and a temperature of 78°C. If equilibrium was attained at
25°C, determine the mass of the ice placed in the container.
a. 30.3779grams
b. 29.6058grams
c. 31.1184grams
d. 29.9868grams

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