Using a sling psychrometer, you measure the air temperature to be 12°C and the wet-bulb temperature to be 8°C. What is the relative humidity? 74% O 100% O 16% O 57% 1 pts

Question 1 During a 30-minute period under clear skies, 2.0 x 10 J of total solar energy were incident upon Bunche Hall. Use this information on energy and time to complete the following tasks. Calculate the mean incident radiant flux over that 30-minute period. What are the units for the previous answer for Radiant Flux Kelvin Meters Microns J/s^2 J/s Watts W/m^2 Nanometers W/m Joules Fahrenheit Celsius

5) In the Swiss Alps, the air pressure is relatively low due to the high elevation. Assuming an air pressure of 75 kPa and a temperature of 4°C, how many air molecules will there be in a 1 liter (10-3 m³) bottle? a) 1 x 1022 b) 2x 1022 c) 3 x 1022 d) 4 x 1022 e) 5 x 1022 f) 6 × 1022 6) An alphorn plays a sustained tone at 29 Hz. A second, smaller alphorn produces 120 beats per minutes when played with the 29 Hz instrument. What is the frequency of this second alphorn? a) 2 Hz b) 27 Hz c) 29 Hz d) 31 Hz e) 120 Hz f) 149 Hz Short Answer Question Model an alphorn as an open-closed pipe with a first harmonic (m=1) frequency of 29 Hz. . Sketch the first (m=1) harmonic showing it at two different times. ⚫ Determine the wavelength (in m) of the first harmonic. . What is the length of the pipe (in m)? ⚫ Calculate the frequency (in Hz) of the next two harmonics.

5. (14.10) What is the specific heat of a metal substance if 135 kJ of heat needed to raise 4.1 kg of the metal from 18.0°C to 37.2°C? 6. (14.21) A 0.095-kg aluminium sphere is dropped from the roof of a 55-m-high building. If 65% of the thermal energy produced when it hits the ground is absorbed by the sphere, what is its temperature increase?