When you are swimming at the bottom of a pool, the water above and around you exerts force on your eardrum. Calculate the force (in N) exerted on your eardrum when you are at the bottom of a pool that is 5.0 m deep. Assume that the area of your eardrum is 1 cm^2 and the density of water is 1000 kg/m^3 (10,000 cm^2 = 1m^2) (Ans: 5N) To solve this, which of the following equation/s should you use (check as many that best applies) O Q= MCAT O F1_ F2 A1 A2 O Q = mL O PV = nRT 9 enc €0 O A1V1= A2V2 O du = dQ – dW or AU= Q- W O TK = Tc+273.15K O E=F/q O F=ma O P= pgh O Fp =P fluidgV submerged O AL = «L0AT W = V1 Op =m/V

A LaGuardia Physics Professor drops a stone into a well. How deep is the well if the Professor hears the sound from the stone hitting the bottom of the well 1.9 s later? Neglect the air resistance and take the free fall acceleration g = 9.81 m/s². The air temperature is T = 24.5°C. Hint: g.t² Try to set the following equations: (1) for the stone to fall down, h = -; (2) for the sound to travel 2 back to the surface, h = c · t2; and (3) for the delay time, t = t₁ + t2. You have 3 equations and 3 unknown variables: t₁, t2, and h. And, of course, you will need the speed of sound at the given air temperature: c = (331.3 +0.606 · T) m/s. The depth of the well, h = 17.707 X Units m How long did it take for the sound to travel back? The time, ts = Units Select an answer ✓

An X-ray machine makes an image of the internal organs by exposing the human body to the electromagnetic radiation with the wavelength of 10^-10 m. We call this electromagnetic radiation X-rays. Assuming that the speed of light is 3x10^8 m/s, what is the frequency of oscillations of the X-rays? Express your answer in Hertz (Hz).

You are part of a scientific expedition that landed in the planet Martech. The planet has an atmosphere of an unknown gas. In your preparation for the mission you prepared the following table, a resonance tube and a sonic device that can produce three frequencies: 261HZ, 330HZ and 512HZ. Temperature (°c Speed (m/sec) Substance CO2 258 CO2 20 267 Air 331.5 Air 20 344 Water Vapor Helium Hydrogen 20 395 20 927 1,270 Argon 20 300 Delakium 20 2950 You measured the temperature of the gas in the atmosphere and recorded 20 degree Celsius. Remembering the valuable learning experience you had in your class Science and Technology in the Arts, you need to determine the gas of the atmosphere on the planet Martech. When rushing to implement the experiment, you used the sonic device to produce the three frequencies above the resonance tube, but recorded only the length of the resonance tube that produced the first maximum intensity for each one of them without recording the frequency of the sonic…