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Surgeons can remove brain tumors by using a cavitron ultrasonic surgical aspirator, which produces sound waves of frequency 23.7 kHz. Estimate the wavelength of these waves in air?
A factory worker pushes a 31.0 kgcrate a distance of 6.5 m along alevel floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and floor is0.25.
In the ammonia (NH3) molecule of Figure 9-39, three hydrogen (H) atoms form an equilateral triangle, with the center of the triangle at distance d = 9.40 ×10-11 m from each hydrogen atom. The nitrogen (N)atom is at the apex of a pyramid, with the t..
A magnetic field is perpendicular to the plane of asingle-turn circular coil. The magnitude of the field is changing,so that an emf of 0.80V and a current of 3.2 A are induced in the coil.
Three identical train cars, coupled together, are rolling east at 1.2 m/s. What is the speed of the five-car train
A person's prescription for his new bifocal eyeglasses calls for a refractive power of -0.0650 diopters in the distance-vision part, find both the near point and the far point. It asks for both, not just one
Find the equivalent resistance of two resistors connected in parallel if one is 0.5 ohm and the other 0.33 ohm, what current will flow through the 10-ohm resistor
A 10 gauge bare wire (2.6 mm in diameter) can carry a currentof 51 A without overheating. For thiscurrent, what is the magnetic field at the surface of the wire
question an ambulance has a siren of frequency 700 hz. if the ambulance is moving at a speed of 60 miles per hour what
A 30.0- goldfinch lands on a slender branch, where it oscillates up and down with simple harmonic motion of amplitude 3.50×10?2 and period 1.50. What is the maximum acceleration of the finch
astronomers have discovered a planetary system orbiting a star which is at a distance of 5.6 times 1018 m from the
Your friend's car is parked on a cliff overlooking the ocean on an incline that makes an angle of 19.9 below the horizontal. Find the car's position relative to the base of the cliff
A .230 kg baseball is thrown with a speed of 41 m/s. If the above ball comes to rest in the catcher's mitt in .085 seconds, how much force does the ball apply on the catcher's mitt
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