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The intensity level of 34.07 harmonicas in a harmonica band is 78.31 dB. Compute the intensity level generated by one harmonica?
The light isotope of lithium, 5Li is unstable and breaks up spontaneously into a proton (hydrogen nucleus) and an particle (helium nuclus). In this process, a total energy of 2.75 10-13 J is released, appearing as the kinetic energy of the two rea..
A mover's dolly is used to transport a refrigerator up a ramp into a house. The refrigerator has a mass of 108 kg. What is the work done on the refrigerator by the machine
A 50 turn square coil of length 6.00 cm and width 5.00 cm, is rotated at 20.0 rad/s in a 3.00 T magnetic field. What is the voltage amplitude
Use the uncertainty principle to estimate the size of an H atom and the energy of the ground state. Then, assuming some radius r, calculate the related uncertainty in momentum p to get the KE. Minimize the total energy to determine r and the ground..
A luge and its rider, with a total mass of 96 kg, emerge from a downhill track onto a horizontal straight track with an initial speed of 42 m/s. What magnitude F is required for the decelerating force
Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.70 1011 m apart, What is the mass of the smaller star
Consider the Earth and a cloud layer 800 m above the planet to be the plates of a parallel-plate capacitor. what is the maximum charge the cloud can hold
Three negative charges of equal magnitudes are positioned along the x-axis at x = -a, x=0, and x = +a respectively. How does the potential energy of the system of charges change as a result
A Texas cockroach of mass 0.168 kg runs counterclockwise around the rim of a lazy Susan (a circular disk mounted on a vertical axle) that has a radius 15.2 cm, What is the angular speed of the lazy Susan after the cockroach stops
The archerfish successfully shoots down the resting insect by spitting water drops at the same angle 60^circ above the surface and with the same initial speed v as before. At what height h above the surface was the insect.
If you are given a velocity versus time graph, and v initial is given, how do you calculate instantaneous acceleration
A skier of mass 64 kg is pulled up a slope by a motor-driven cable. What power (expressed in hp) must a motor have to perform this task
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