A sound wave in air has a pressure amplitude equal to4.10 multiplied by10-3 N/m2. Calculate the displacementamplitude of the wave at a frequency of 9.4 kHz. (Note: Use the following values, asneeded. The equilibrium density of air is rho = 1.20kg/m3; the speed of sound in air is v = 343m/s. Pressure variations ΔP are measuredrelative to atmospheric pressure, 1.013 multiplied by 105Pa.)
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What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

Could we see a galaxy that is 20 billion light-years away?

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.