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A jewel smith wishing to buff a finished piece of jewelry attaches a buffing disk to his drill. The radius of the disk is 2.70 mm and he operates it at 1.95 104 rad/s.
(a) Determine the tangential speed of the rim of the disk.
m/s
(b) The jeweler increases the operating speed so that the tangential speed of the rim of the disk is now 285 m/s. What is the period of rotation of the disk now?
s
A 200-W infrared laser emits photons with a wavelength of 1.05 multiply.gif 10-6 m, and a 200-W ultraviolet light emits photons with a wavelength of 3.51 multiply.gif 10-7 m. What is the energy of a single infrared photon
A consumer upset with the latest trend of postal rate increases has decided to try to send letters by balloon even though they may not reach their intended destination
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Brain injuries in auto accidents. Brain injuries generally occur any time the brain's acceleration reaches 100 g for even a short time. Find the maximum speed with which the car can strike the barrier without causing brain injury, using an airbag
The current in the circuit if the speed v is 0.75 m/s , determine which end of the rod is positive.
A lead block is suspended from the underside of a 0.8 kg block of wood of density of 720 kg/m3. determine the mass of the lead block
A proton is located at x=1.0nm, y=0.0nm and electron is located at x=0.0nm, y=4.0nm. Find the attractive Coulomb force between them
A baseball (m = 148 g) approaches a bat horizontally at a speed of 41.5 m/s (93 mi/h) and is hit straight back at a speed of 45.9 m/s (103 mi/h).
Cut a 1 cm cube in dimension along the X, Y, and Z axis 10 times and calculate the volume and surface area at each cut.
A team of tornado-chasing meteorology graduate students is out in search of tornados. What frequency of sound do the students hear
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).
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