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1. Compute the pressure ratio (P₁/P₂) of nitrogen that is expanded isentropically from
620 °F to 60 "F.
A 10kg mass has a ke of 125 j what is the velocity
A copper calorimeter of mass of 70.5g contains 100g of water at 19.5°c, naphthalene (np) melting point is 79.9°c is melted in a test tube and then poured into the calorimeter. If the highest temperature reached by the water after stirring is 28.7°c and the final mass of the calorimeter and it’s content is 188.3g. Calculate the latent heat of fusion of naphthalene
If you can travel back in time and reset it to January 2016, what will you invent and what principle of physics will you use to help/aid in the pandemic the world is experiencing today?
It has been clearly asked by the Department of Health that people should avoid closed spaces since the COVID-19
virus can be easily transmitted in these type of areas. WHAT DO YOU THINK IS THE PRINCIPLE OF PHYSICS USED to arrive at the mentioned fact? Elaborate your answer.
An ideal gas at 15.5 °C and a pressure of 1.72 x 10 ⁵pa occupies a volume of 2.81 cubic meter (show solution).
A) How many moles of gas are present?
B) If the volume is raised to 4.16m³, and the temperature raised to 28.2°C, what will be the pressure of the gas?
An ion engine (see Fig. 1-6) has a 1-T magnetic field, and a hydrogen
plasma is to be shot out at an Ex B velocity of 1000 km/sec. How much internal
electric field must be present in the plasma
1. A deep sea ocean vessel uses SONAR to detect the ocean's bottom. Sound waves are emitted from the surface of the ocean and travel through the water at 1450 m/s. The ocean bottom is 1630 m below the surface. Determine the amount of time that passes before the sound waves are reflected back to the surface.
A. 1.12 s C. 0.89 s
B. 2.25 s D. 1.78 s
1. In general, the higher the frequency of the interfering waves,
A. the higher the wavelength C. the greater the number of nodes and antinodes B. the higher the speed of the waves D. the higher the amplitude of the waves
2. Which of the following materials should be use to make an ear protector against loud sound?
A. a material that produces sound C. a material that absorbs sound
B. a material that transmits sound D. a material that amplifies sound
1. The pattern of the standing wave is called the
A. Interference C. Antinode
B. Harmonic D. Node
2. Standing waves are created by
A. Two identical waves reflecting off each other
B. Two identical waves move through each other in opposite directions
C. Two identical waves being diffracted together
D. Two identical waves are diffracted from two identical sources
