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1) What is the density of water vapor in g/m3 on a hot dry day in the desert when the temperature is 40.0°C and the relative humidity is 16.0%? 2) If the relative humidity is 84.0% on a muggy summer morning when the temperature is 20.0°C, what will it be later in the day when the temperature is 30.0°C, assuming the water vapor density remains constant? 3) On a certain day, the temperature is 30.0°C and the relative humidity is 88.0%. How many grams of water must condense out of each cubic meter of air if the temperature falls to 15.0°C. Such a drop in temperature can, thus, produce heavy dew or fog. 4) Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a total of 22 rubs, at a distance of 7.00 cm per rub, and with an average frictional force of 48.0 N, what is the temperature increase? The mass of tissues warmed is only 0.110 kg, mostly in the palms and fingers. 5) The number of kilocalories in food is determined by calorimetry techniques in which the food is burned and the amount of heat transfer is measured. a) How many kilocalories per gram are there in a 3.03-g walnut if the energy from burning it is transferred to 0.420 kg of water held in a 0.092-kg aluminum cup, causing a 45.7°C temperature increase? b) If a serving of walnut consists of 16.0-g, how many kcal is consumed per serving? (Note: Food packaging energy content is labeled as "Cal" which is equivalent to "kcal".)
A 100kg block is sitting at rest on a horizontal table. what is the force the table exerts on the block
From the shore, you observe a buoy in the ocean rising and falling with the waves. You determine it takes 5 s for the buoy to go down and up again, Approximately how fast are the waves moving
An experiment measures the temperature of a 270 substance while steadily supplying heat to it. The results of the experiment show. What are (a) specific heat of the liquid phase and (b) the heat of vaporization.
A 11.0-g wad of sticky clay is hurled horizontally at a 130-g wooden block initially at rest on a horizontal surface. what was the speed of the clay immediately before impact
find the initial velocity of the ball. An echo is heard in 3 sec after the emission of sound. If speed of sound in air is 342 m/s, what is the distance of the reflecting surface from the source.
The width of the contact of each wire with your skin is 1.10 cm and the thickness of the conducting layer of your skin is 0.023 mm, calculate the resistivity of your skin
Two submarines are moving towards each other in a portion of the Atlantic Ocean where the water is calm. Sub A is moving at 14.0 m/s, What frequency does sub B detect
A football is kicked at an angle of 28.4 degrees above horizontal and with an initial speed of 27.9. The ball lands on a level field. Determine The range of the football
A certain species of ionized atoms produces an emission line spectrum according to the Bohr model, Find the next-to-the-longest wavelength in the series of lines
An open-tube mercury manometer is used to measure the pressure in an oxygen tank. The atmospheric pressure is 1020mbar .1 bar = 105 N/m2. Determine the absolute pressure (in Pa) in the tank
you ar charged to work on reducing expenditures for a company.you think that the company can save considerable money on fuel costs by lowering the room temperature of the building for daily use, How much heat will be saved each morning
A pair of earplugs claims to reduce the sound level by 37.1 dB. By what factor is the intensity reduced
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