AVAT11005: Aviation Physics - Frequency of the Second Hand of a Clock - Physics Assignment Help

Assignment Task :

1. What is the wavelength of a 340 Hz tone in room temperature air? What is the  wavelength of a 34,000 Hz ultrasonic wave in the same air?

2. What is the frequency of the second hand of a clock? The minute hand or the  hour hand, Explain? 

3. A series circuit consists of a 12 V battery, and four resistances of 2 Ohm, 3  Ohm, 4 Ohm and 5 Ohm. Calculate the voltage drop across each resistance,  the current flowing through each resistance and current flowing through the  battery. What is the total power consumption of the circuit? 

4. A household circuit operating at 240 V has four appliances connected in  Parallel. The resistances of the three appliances are 20 Ohm, 30 Ohm, 50 Ohm  and 70 Ohm, respectively. Calculate the voltage drop across each appliance  (resistance), the current flowing in each of the three appliances, and the current flowing through the battery (e.g. the power source). Calculate the power  consumption of the system.  

5. A piece of iron of specific heat capacity 0.04J/Kg K and mass 400 kg, is quickly  dropped into 35 kg of water at 100 C contain in a calorimeter of 120 kg and  specific heat capacity of 0.1 J/Kg K. If the temperature of the mixture is 300 C,  calculate the initial temperature of the hot iron (4200 J/Kg K = specific heat  capacity of water).  

6. A plastic-coated window consists of Perspex and glass. At the Perspex to glass  interface the angle of refraction is 30.00. and the angle of incidence is 20.00. If  the refractive index of the glass is 1.75, what is the refractive index of the  Perspex? 

7. The Figure shows a ray of light traveling through air towards a thin layer of  linseed oil (n = 1.50) resting on top of water (n=1.33). The light ray approaches  the linseed oil at an angle of incidence of 48.2°. 

a. Determine the angle of refraction at the air-linseed oil boundary. 

b. Determine the angle of refraction at the linseed oil-water boundary.

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