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Q1. A dentist's drill starts from rest. After 3.20 s of constant angular acceleration, it turns at a rate of 2.46 104 rev/min.
(a) Find out the drill's angular acceleration.
(b) Determine the angle through which the drill rotates all through this period.
Introductory Mechanics: Calculate the smallest coefficient of static friction
Status Newton's First Law of motion.
Sketch a principle ray diagram showing the formation of the image. compute the position, size, orientation (erect or inverted), and nature (real or virtual) of the image.
How to find out the force of friction
Two charges are placed on the x axis. One of the charges (q1 = +6.95C) is at x1 = +3.00 cm and the other (q2 = -27.3C) is at x2 = +9.00 cm. Find out the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b..
What is the ratio of the amplitude
Compute the horizontal distance
Estimate the thickness of lead shielding needed to reduce the exposure rate 2.5 m from a 5.92x10^11 Bq point source of Cs-137 to 1.0 mR/hr.
An asteroid is discovered heading straight toward Earth at 13km/s. An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 mins, after which the asteroid is moving at 28 degrees to its original path at a..
With what minimum speed should you toss a 140g ball straight up to hit the 11.0m-high roof of the gymnasium if you release the ball 1.30m above the ground? Resolve this problem using energy.
What is the horizontal component of velocity
Establish angles subtended by the moon and the sun
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