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An untethered(free) weather balloon travelling with the wind (at wind speed) emits a 1 khz sound wave. The wind is blowing with respect to the land
You can estimate the distance to a lightning flash by counting the seconds that elapse between the time you see the flash
Pick a specific sound, give the decibels of the sound, and explain what this measurement means?
The echo comes back at an angle of 20 degrees above the horizontal and the echo took 2.32 s to get back to submarine.
The atom is mostly empty. If all the atoms in the Earth collapsed in to the size of a nucleus, what would be the Earth's diameter?
What conditions must be met to produce simple harmonic motion?
What is the potential energy of the block when it comes to rest on the incline?
Two sound waves are emitted: y1, with frequency f1, and y2, with frequency f2, with other constants identical, as expressed below.
A student sits on a freely rotational stool holding two dumbbells, each of mass 3.00 kg. When the students arms are extended horizontally.
A simple harmonic oscillator, of mass m and natural frequency w_0, experiences an oscillating driving force f(t)=m a cos(wt).
Assume that the proton behaves as a uniformly-charged sphere of radius R=10^(-15) m. Calculate the shift this produces in the ground-state energy of hydrogen.
A system is in an eigenstate | psi_i > with energy E_i. The perturbation V(t) = H'exp(-((alpha)^2)(t^2)).
Calculate the impedance (XR) of R = 100 at f = 6 hz, 60 hz, and 600 hz.
Two identical spin-1/2 particles with mass m are in a one-dimensional infinite square-well potential with width a, so V(x)=0 for 0 <= x <= a.
A 70 kg ancient statue lies at the bottom of the sea (fresh water). Its volume is 3.0*10^4 (cm)^3.
You should assume g = 9.8 m.s-2 and give your answer to an appropriate number of significant figures and in the correct SI units.
It has a head-on collision with a 0.303 kg glider that is moving to the left with a speed of 2.25 m/s .
Suppose you place a speaker in front the open end of a tube which is closed at the other end, and vary the frequency of a pure sound (sine wave)
The band gap of pure GaP is 2.25 eV. Calculate the molar fraction of GaP required to produce the 1.78 eV band gap.
What about two copper wires with different grain sizes, work hardening histories or levels of impurities? Explain.
Using ?= 2L/n-1 plot a graph of frequency of standing wave, f, versus the inverse of the wavelength, IA, for the first value of hanging mass.
The spring is released, shooting the mass forward from A to B (frictionless). The mass then travels along a flat surface from B to C (L=20m).
A curve in a stretch of highway has radius R. The road is unbanked. The coefficient of static friction between the tires and road is µs.
The suspended 8 kg slender bar is subjected to a horizontal impulsive force at B. The average value of the force is 1,000 N, and its duration is 0.03 s.
All modern elevators feature safety mechanisms. For example, if an elevator cable breaks, the falling elevator car will land on a set of giant springs.