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1. A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.05 x 10^4 rad/s to 3.14 x 10^4 rad/s. In the process, the bit turns through an angle of 1.88 x 10^4 rad. Find the angular acceleration, assumed constant. With the same angular acceleration, how long would it take the bit to reach its maximum angular speed of 7.85 x 10^4 rad/s, starting from rest?
2. Find the values required in each case:
a. The wavelength of a 500 Hz sound wave traveling in air at 20 degrees CELSIUS.
b. The frequence of a microwave whose wavelength is 1.00 cm. (Microwaves travel with the speed of light, 3.00 x 10^8 m/s).
c. In seawater at 20 degrees CELSIUS, what is the wavelength of a 1000 Hz sound wave?
d. What is the frequency of red light with a wavelength in vacuum of 600 nm?
At a distance r1 from a point charge, magnitude of the electric field created by the charge is 296 N/C. At a distance r2 from the charge, the field has a magnitude of 168 N/C. Find the ratior2/r1.
What is Lagrangian for the system
A 6.00kg ball is dropped from a height of 11.0m above one end of a uniform bar that pivots at its center. The bar has mass 7.50kg, How high will the other ball go after the collision
A motorist drives south at 28.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.20 min, find the average velocity and degree south of west
What is rms speed of the atoms at temperature
At a distance of 6.0 km from a radio transmitter, the amplitude of the oscillating electric field of the radio wave is Eo=.13 V/in, What is the time-averaged energy flux
The total volume of the column of water in the neck is 0.200 m^3. Illustrate what is the magnitude of the force exerted by the water on the bottom of the container?
Start with the thin lens equation and solve for the image distance in terms of the focal length and object distance. Use this to explain why you can expect a real image only
An object in the shape of a thin ring has radius a and mass M. What is the gravitational force that the sphere exerts on the ring-shaped object
The vertical displacement of particles in a string (when a wave is propagating through it) is given by y = (0.02) sin[(10?)t - (8?)x], where everything is measured in standard units, meters and seconds. What is the amplitude of the wave?
Find out the average speed for the trip
A long straight wire carries a current that is increasing at the rate of one ampere per microsecond. find In which direction will current flow in each loop
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