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A specific ultrasonic application (used for metallurgy) has a frequency of 20,000 Hz. Using the speed of sound in steel = 5750 m/s. An ultrasonic pulse is sent off a steel beam
1. An ultrasonic pulse is sent off a steel beam bounces off a the end and the pulse is detected 0.003 seconds later. What is the total distance the sound wave travels?
2. How long is the steel beam?
in a physics lab experiment a spring clamped to the table shoots a 22 g ball horizontally. when the spring is
A plane is flying in the horizontal plane. At time t1 = 0 s with the components of its velocity are vx= 100 m/s and vy = 120 m/s. At time t2= 20 s the components are vx = 80 m/s and vy = 142 m/s.
Determine the maximun wavelength of incident radiation that can be used to remove the remaining electron from a singly ionized helium atom He+ (z= 2)
What is the maximum efficiency that a heat engine
A 45.4 kg girl is standing on a 144 kg plank. The plank, at first at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.60 m/s relative to the plank. Wha..
A certain type of laser emits light that has a frequency of 5.2 x 10^14 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.7 x 10-11 s. How many wavelengths are there in one pulse.
The current in a 100 watt light bulb is 0.760 Amp. The filament inside the bulb is 0.290 millimeter in diameter. Calculate the current density in the filament
A 100.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 36.0 deg with the horizontal. Find the magnitude of the applied force
A 63-kg canoeist stands in the middle of her 22-kg canoe. Thecanoe is 3.0 m long, and the end that is closest to land is 2.5 mfrom the shore. Calculate the distance from the canoeist to the shore
What is the relationship between the light emitted by an atom and the energies of the electrons in the atom?
The coefficient of linear expansion of a certain solid is 9 * 10^-6/C degrees. Assuming this solid behaves like most solids, what is its coefficient of volume expansion?
A car of mass m= 1,807 kilogram is driving with constant speed v= 42.2 meter per second on a circular track of radius R = 26.7 meter. Obtain the magnitude of the acceleration of the car in m/s2
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