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There is evidence that elephants communicate via infrasound, generating rumbling vocalizations as low as 14 Hz that can travel up to 10 km. The intensity level of these sounds can reach 97 dB, measured a distance of 4.0 m from the source. Determine the intensity level of the infrasound 10 km from the source, assuming the sound energy radiates uniformly in all directions.
dB
The voltage across an air-filled parallel-plate capacitor is measured to be 85.0 V. When a dielectric is inserted and completely fills the space between the plates, the voltage drops to 25.0 V. If the dielectric doesnt completely fill the space betwe..
The most common isotope of a single nucleus (stripped of its electrons) is accelerated from rest through a potential difference of 1200V, What element is the unknown nucleus on periodic table
A head-on, elastic collision between two particles with equal initial speed vleaves the more massive particle (massm1) at rest. Find the final speed of the less massive particle
Suppose that a 1.00 cm3 box in the shape of a cube is perfectly evacuated, except for a single particle of mass 1.15 10-3 g. Find the mass density inside the box
An electromagnet is made by inserting a soft iron core into a solenoid. What is the relative permeability KB of the iron core
What is the apparent weight of a 75 kg astronaut.
The distance to the moon can be found with the help of mirrors left on the moon by astronauts. calculate the distance from the earth to the moon
A boy of mass m runs with a speed v and jumps onto a sled on an icy pond. The sled was at rest before the boy jumped onto it. After the jump, What is the mass of the sled
A bowling ball has a mass of 3.3 kg, a moment of inertia of 0.076032 kg · m2, and a radius of 0.24 m. What is the total kinetic energy of the rolling ball
From the difference in mass of a hydrogen atom (Appendix B) to the mass of a proton and an electron (Table 1.5), estimate the binding energy of the electron in the hydrogen atom. Compare this to the ionization energy of the ground state electron a..
Explain how can a contribution statement be used to improve planning in a financial institution like a bank?
Three capacitors C1 = 2.5 µF, C2 = 7.5 µF, and C3 = 13 µF are connected as shown with a battery of voltage V = 18 V. (When entering units, use micro for the metric system prefix µ.) (a) What is the equivalent capacitance of this circuit? (b) What is ..
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