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A dentist's drill starts from rest. After 2.90 s of constant angular acceleration it turns at a rate of 2.0 multiply.gif 104 rev/min.
(a) Find the drill's angular acceleration.
rad/s2
(b) Determine the angle (in radians) through which the drill rotates during this period.
rad
A hollow sphere of inner radius 7.1 cm and outer radius 9.7 cm floats half submerged in a liquid of density 510 kg/m3. Calculate the density of the material of which the sphere is made
What fraction of incident intensity is transmitted by system
The second minimum in the diffraction pattern of a 0.12 mm -wide slit occurs at 0.68 degrees. What is the wavelength of the light?
A battery with an emf of 12.0 V shows a terminal voltage of 11.8 V when operating a circuit with four light bulbs each rated at 4 W (at 12.0 V) which are connected in parallel. What is the current in each bulb
A 25g ball is fired with an initial speed v1 toward a 150g ball that is hanging motionless from a 1.30m string. The balls have a perfectly elastic collision. As a result, 150 g ball swings out until the string makes an angle of 37° with vertical. ..
What is the velocity of each ball after the elastic collision? What will be the highest height of each ball after the elastic collision .
How long after being thrown will the balls collide
Questions on blackbody, Infra-Red Detectors & Optic Lens and Digital Image.
A 1.0-cm-diameter pipe widens to 2.0 cm, then narrows to 0.5 cm. Liquid flows through the first segment at a speed of 9.0 m/s. What is the speed in the second segment
The tungsten filament of a certain 100 W light bulb radiates 4.00 W of light. Find the filament's temperature
A placekicker must kick a football from a point 36.0 m (about 40 yards) from the goal. By how much does the ball clear or fall short of clearing the crossbar
A small piece of Styrofoam packing material is dropped from a height of 1.50 m above the ground. Until it reaches terminal speed, magnitude of its acceleration is given by a = g - bv. After falling 0.40 m, the styrofoam effectively reaches its ter..
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