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A point on the rim of a 0.70 m diameter grinding wheel changes speed uniformly from 12 m/s to 26 m/s in 7.5 s. What is the average angular acceleration of the wheel during this interval?
What is the breaking strength
A 5.00 g charged insulating ball hangs on a 27.0 cm long string in a uniform horizontal electric field, mfind the strength of the field
On a spacecraft, two engines are turned on for 730 s at a moment when the velocity of the craft has x and y components of velocity v0x = 4040 m/s, Find the x and y components of the craft's acceleration
A runner travels 2 km north, then 1 km west, then 1 km north, then 3 km east. The run took 45 minutes. What was the total path length of the run
A lens with a focal length of 25 cm and a concave mirror with a radius of curvature of 100 cm are placed 1.0 meters apart. determine if it is real or virtual
Find the capacitance of a parallel plate capacitor that has two square plates both having a side length of 6 cm, where these plates are seperated by 15 mm
The work function for iron is 4.50 eV. Find the cutoff wavelength for iron and What is the lowest frequency of light incident on iron that releases photoelectrons from its surface
A 2000kg truck pulls a 700 kg trailer. Starting from rest the truck begins accelerating with an acceleration of 4.5m/s^2. what force does the trailer exert on the car
Two small objects are hung, from a point, on strings 50 cm long. they each have mass .06 grams and are given equal charges if the strings each make an angle of 37 degrees with a vertical, what is the magnitude of the electric force between the ob..
The primary coil of a transformer has N1 = 2.00 102 turns, and its secondary coil has N2 = 1.00 102 turns. what rms voltage is developed across the secondary coil
Two titanium spheres approach each other head-on with the same speed and collide elastically. What is the mass of the other sphere
A siren has a frequency of 750 Hz when it is at rest, whereas it has an apparent frequency of 800 Hz when it is moving toward a stationary observer
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