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A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 54.0 kHz, and if the speed of sound in air is 340 m/s, what is the smallest insect a bat can detect?
Astronomers discover a binary star system that has a period of87.0 days. The binary star system consists of two equal-mass stars,each with a mass twice that of the sun, that rotate like a dumbbellabout the center of mass at the midpoint between them ..
"For a system of two particles we often let the potential energy for the force among the particles approach zero as the separation of the particles approaches infinity. If this choice is made, describe why the potential energy at non-finite separatio..
Suppose you're building a scale model of the hydrogen atom, and the nucleus is represented by a ball of radius 3.2 cm (about the radius of a baseball)
A weightlifter bench-presses a 170.0 kg barbell from his chest to a height equal the length of his arms 0.750 m. What is the potential energy of the barbell relative to the weightlifter\'s chest after he lifts the barbell
Determine the magnitude of the force between two point charges, Q1 = -2e located at (-3.60 cm, +4.10 cm) and Q2 = -8e located at (-0.60 cm, -8.60 cm). Continue working the problem above by calculating the direction of the force that Q1 exerts on Q..
A ball falls straight down onto a wedge that is sitting on frictionless ice. The ball has a mass of 3.21 kg, what is the velocity of the ball after the collision
A closely wound rectangular coil of 50 turns has dimensions of 12.0 cm by 25. 0 cm. The plane of the coil is rotated from a position where it makes an angle of 45.0 degrees by a magnetic field of 2T to a position perpendicular to the field. The rotat..
diamagnetism is caused by:
a football is kicked at ground level with a speed of 16.6ms at an angle of 42.9 to the horizontal. how much later does
A rectangle measuring 30.0 {rm cm} by 40.0 {rm cm} is located inside a region of a spatially uniform magnetic field of 1.30 T, with the field perpendicular to the plane of the coil. The coil is pulled out at a steady rate of 2.00 {rm{ cm/s}} travelli..
An explosive charge breaks an object into two splinters, with respective masses m1 = 1.9 kg and m2 = 5.7 kg. What is the ratio of the separation speeds v2/v1
What is the Fourier transform of the 2-term wavelet f(t) = (4,2,1). Calculate this on paper (show your work) and graph the amplitude and phase spectra for this wavelet.
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