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Let's consider how to reduce errors in the ultrasound experiment. We describe a frequency (40 kHz) and measured wavelength. What wavelengths should we measure if we change the frequency to 345 Hz, 3,450 Hz or 345,000 Hz? (Use v=345 m/s for the speed of sound) Please describe which of these measurements would be the most accurate? Why would someone decide to use 40 kHz instead of the frequency leading to the mainly accurate measurement in this experiment?
A cook puts 8.80 g of water in a 2.00-L pressure cooker that is then warmed to 480°C. What is the pressure inside the container
What is the smallest quantum of energy that can be absorbed by the molecule in a rotational excitation? What is the smallest quantum of energy that can be absorbed in a vibration excitation? In what regions of electromagnetic spectrum do the transiti..
nuclear-pumped x-ray lasers are seen as a possible weapon to destroy icbm booster rockets at ranges up to 2000 km. one
Using a highly sensitive parabolic sound collector, Amy records the frequency of a tuning fork as it drops into the Grand Canyon. She drops the vibrating tuning fork from rest at t=0. She records a frequency of 1657.0 Hz at t=6.400 s.
A ball with a mass of .100 kg is on a spring that is 10.0 m above the ground with a spring constant of 543 N/m and has been compressed .125 m. Determine the initial kinetic energy of the ball
On a cold day, 16000 J of heat leaks out of a house. The inside temperature is 20.0° C, What is the increase in the entropy of the universe
A beam of unpolarized light in air is incident at an angle of 59.0? (with respect to the normal) on a plane glass surface. What is the angle of refraction of the transmitted beam
A 1.33kg dense mass is on the end of 4.50m "string", What Would be the period of the pendulum on earth
A planet can have an atmosphere if the escape speed of the planet is 6 times larger than the thermal speed of molecules in the atmosphere. What is the radius of this object's orbit around the sun
A child and a sled with a combined mass of 50.0 kg slide down a frictionless slope. If the sled starts from rest and has a speed of 3.00 m/s at the bottom, what is the height of the hill
Two long, straight wires are separated by 0.12 m. The wires carry currents of 1.0 A in opposite directions, as the drawing indicates. Find the magnitude of the net magnetic field at the point A
a 2.60-g lead bullet at 32.0degc is fired at a speed of 210 ms into a large block of ice at 0degc in which it becomes
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