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A water heater is operated by direct solar power. If the solar collector has an area of 12m2, and if the intensity delivered by sunlight is 620W/m2, how long does it take to increase the temperature of 1.8m3 of water from 21°C to 46°C? Take the water specific heat capacity to be 4186 J/(oC kg). Take the density of water to be 1g/cm3 . State your answer in minutes to the nearest minute. Do not enter the units.
You found a treasure map, and it's said: staring at well walk 30 m north, 20 m 30° N of East, 15 m 18° south of west, and finally 10 m north. How far is the treasure map from the well?
A water heater is operated by direct solar power. If the solar collector has an area of 12m2, and if the intensity delivered by sunlight is 620 W/m2, how long does it take to increase the temperature of 1.8m3 of water from 21 Celsius to 46 Celsius? Take the water specific heat capacity to be 4186 j/(Celsius kg). Take the density of water to be 1g/cm3. State your answer to the nearest minute.
A water heater is operated by direct solar power. If the solar collector has an area of 12m2, and if the intensity delivered by sunlight is 620W/m2, how long does it take to increase the temperature of 1.8m3 of water from 21°C to 46°C? Take the water specific heat capacity to be 4186 J/(oC kg). Take the density of water to be 1g/cm3 . State your answer in minutes to the nearest minute. Do not enter the units.
A school teacher duplicated Torricelli's barometer using a mineral oil, of density 1,220 kg/m3, as the working liquid. What was the height of the oil column on the day when the atmospheric pressure value was 95,000Pa? State your answer in meters to the nearest thousandth of a meter. Take the value of g to be 9.8m/s2 . Do not attempt to enter the unit.
You found a treasure map, and it's said: staring at well walk 30 m north, 20 m 30° N of East, 15 m 18° south of west, and finally 10 m north. How far is the treasure map from the well?
A diving bell in the shape of a cylinder with a height of hb= 1.2m is closed at the upper end and open at the lower end. The bell lowered from the air into sea water with mask density p=1.033 g/cm3. The air in the bell is initially at 24.0 Celsius. The bell is lowered to a depth (measured to the bottom of the bell) of d=140 m. At this depth the water temperature is 6.0 Celsius, and the bell is in thermal equilibrium with the water. Take g=9.7 m/s2 and 1 atm as 101300 Pa.
to what minimum pressure must the air in the bell be raised to expel the water that entered? Input your answer in kPa to one decimal please.
A diving bell in the shape of a cylinder with a height of 2.4m closed at the upper end and open at the lower end. The bell lowered from air into the sea water of density=1,020 kg/m3. The air in the bell is initially at 20 Celsius. The bell lowered to a depth (measured to the bottom of the bell) of 70m. At this depth the water temperature is 5 Celsius, and the bell is in thermal equilibrium with the water. How high does sea water rise in the bell? Give your answer in m to the nearest 0.01m.
take atmospheric pressure to be P0= 101325 Pa, the gravitational constant to be g=9.8 m/s2, and absolute zero to be at -273 Celsius.
Determine the density of oxygen gas (O2) at a pressure of 172,000Pa and temperature =-18 Celsius. State your answer to the nearest 0.001 kg/m3, follow the standard rounding rules in stating answer. Take the molar mass of molecular oxygen to be 32 g/mol, R=8.31 JK^-1mol^-1 and take the absolute zero to be -273 Celsius.
At 23m below the surface of the sea (density of water= 1,014 kg/m3), where the temperature is 4.6 Celsius, a diver exhales an air bubble having a volume of 2.0 cm3. If the surface temperature of the sea is 21 Celsius and the atmospheric pressure measured at the surface is 101,500 Pa, what is the volume of the bubble just before it breaks the surface? Take g=9.8 m/s2 and the absolute zero to be at -273 Celsius. State your answer in cm3 to the nearest 0.01 cm3.
