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BAED-PHYC2121 General Physics 1
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The Doppler shift of ultrasonic waves can measure the speed of blood in an artery. If the frequency of the stationary source is 105 kHz and the reflected sound has a Doppler shift of 180 Hz, what is the blood flow speed? (The speed of sound inside the body is 1 500 m/s.)
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Two springs, each with spring constant 20 N/m, are connected in parallel, and the combination is hung vertically from one end. A 50-N weight is then suspended from the other end of the combined spring. How far does the combined spring stretch as it comes to equilibrium?
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A mass on a spring vibrates in simple harmonic motion at a frequency of 6 Hz and an amplitude of 3 cm. If a timer is started when its displacement is a maximum (hence x = 3 cm when t = 0), what is the speed of the mass when t = 7 s?
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A 0.23-kg mass is oscillating on a spring over a horizontal frictionless surface. When it is at a displacement of 2.2 cm for equilibrium it has a kinetic energy of 1.7 J and a spring potential energy of 2.8 J. What is the maximum speed of the mass during its oscillation?
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14.4 Phases of Matter and Phase Changes
I take 2.0 kg of ice and dump it into 1.0 kg of water and, when equilibrium is reached, I have 3.0 kg of ice at 0°C. The water was originally at 0°C. The specific heat of water = 1.00 kcal/kg·°C, the specific heat of ice = 0.50 kcal/kg·°C, and the latent heat of fusion of water is 80 kcal/kg. The original temperature of the ice was:0%
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If the surface temperature of the Earth is 290 K and that of the Sun is 6000 K, assuming the same emissivities, what is the ratio of the energy radiated per square meter of the Earth to that of the Sun?
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A car with bad shocks bounces up and down with a period of 1.78 s after hitting a bump. The car has a mass of 1,400 kg and is supported by four springs of force constant k. What is k for each spring?
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On a P-V diagram, an ____ process is represented by a horizontal line.
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Bats can detect small objects such as insects that are of a size approximately that of one wavelength. If bats emit a chirp at a frequency of 60 kHz, and the speed of sound waves in air is 339 m/s, what is the smallest size insect they can detect?
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The adiabatic index of a gas is given by which of the following?
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