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When a softball player swings a bat, she accelerates it from rest to an angular velocity of 10 rad/s in a time of 0.27686 seconds. What is the magnitude of the torque she applies to the end of the bat? Model the bat as a uniform rod of length 0.90 m and mass 2.1 kg.
A person sees clearly wearing eyeglasses that have a power of -5.00 diopters, If the person wants to switch to contact lenses placed directly on the eyes, what lens power should be prescribed
copper has 8.5 x 10^28 electrons per cubic meter. if a current of 1.55 A is flowing in the wire, what is the average drift speed of the electrons along the wire
A 54-kg water skier is being pulled by a nylon (Young's modulus 3.7 x 109 N/m2) tow rope that is attached to a boat. What is the change in length of the rope when the skier has an acceleration whose magnitude is 0.59 m/s2
Heather and Mathew walked eastward with a speed of 9.8 m/s. If it takes those 34 min. to walk to the store, how far have they walked.
A 36 g ball is fired horizontally with initial speed v_0 toward a 110 g ball that is hanging motionless from a 1.1 m-long string. The balls undergo a head-on, perfectly elastic collision, after which 110 g ball swings out to a maximum angle theta_..
Positive point-charges of +36.0 mC (Micro C) are fixed at two of the vertices of an equilateral triangle with sides of 3.30 m, located in vacuum. Determine the magnitude of the E-field at the third vertex
A 1000 kg artillery shell is fired from a battleship. What net external force is exerted on the artillery shell before it leaves the barrel of the gun
Here is the data found: This is OHM'S LAW experiment Trial Voltage Current Resistance, What is the uncertainty of this measurement
There is a region with a constant magnetic field 5.2T. The magnetic field is directed out of the page. What is the power in the rod
A golfer takes two putts to get his ball into the hole once he is on the green. What displacement would have been needed to get the ball into the hole on the first putt
On a day when the wind is blowing toward the south at 3 m/s, determine the resultant velocity (speed and direction) of the runner
The distance from the human eye lens system and the retina is typically 19.0 mm. What is the focal length of the eye lens system for a relaxed eye
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