What is the maximum needle speed
A sewing machine needle moves with a rapid vibratory motion, rather like SHM, as it sews a seam. Suppose the needle moves 7.8 mm from its highest to its lowest position and it makes 26 stitches in 8.7 s. What is the maximum needle speed?
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Two semicircular arcs have radii R2 = 10.2 cm and R1 = 3.40 cm, carry current i = 0.820 A, and share the same center of curvature C. What is the magnitude of the net magnetic field at C?
A 5 kg ball is thrown upward with an initial speed of 30 meters per second. Suppose there is a constant air resistance of 25N opposing the motion during its entire up and down path. How much work was done by the air resistance during the entire pat
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A cello string vibrates in its fundamental mode with a frequency of 267 vibrations per second. The vibrating segment is 68 cm long and has a mass of 0.8 grams. Find the tension in the string.
Suppose the needle moves 7.8 mm from its highest to its lowest position and it makes 26 stitches in 8.7 s. What is the maximum needle speed?
If the mirror is now rotated so that the angle of incidence increases by 7.0°, what is the new angle between the incident and reflected beams?
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Calculate the temperature at which a tungsten filament with an emissivity of 0.28 and a surface area of 7.6 × 10-5 m2 will radiate energy at the rate of 30 W in a room where the temperature is 24C.
A standing wave is established in a 89 cm long string fixed at both ends. The string vibrates in 6 segments when driven at 376 Hz. What is the fundamental frequency?
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