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To start her lawn mower, Julie pulls on a cord that is wrapped around a pulley. The pulley has a moment of inertia about its central axis of I=0.570 kg(m2) and a radius of 4 cm. There is an equivalent frictional torque impeding her pull of Tf=.450 m(N). How much tension must the rope exert?
A drug tagged with 9943Tc (half-life = 6.05 h) is prepared for a patient. what is its activity (R) after it has been on the shelf for 2.0 h
A piece of cheese with a mass of 1.11 kg is placed on a vertical spring of negligible mass and a force constant k= 2000N/m that is compressed by a distance of 17.9cm
Light of wavelength ? = 620 nm passes through a pair of slits with separation 2.8 x 10-5 m. What is the angle corresponding to the second bright fringe
It rolls at a steady speed for 1.9 s, then one wheel begins to stick. The train comes to a stop 6.0 m from its starting point. Illustrate what is the train's acceleration after its wheel begins to stick?
What are the magnitude and direction of the resultant vector R , when the parallelogram law is applied to A and B?
the planes speed when landing in still air is 20 m/s. what is the speed relative to the ground if it lands with the 10 m/s wind
A 500g ball swings in a vertical circle at the end of a 1.5-m-long string. When the ball is at the bottom of the circle, the tension in the string is 12N
An audio amplifier provides an alternating rms potential difference of 15.0V. A loudspeaker connected to the amplifier has a resistance of 10.4 ohm. what is the rms current in the speaker
Estimate the kinetic energy of the Mars with respect to the Sun as the sum of the teerms, that sue to its daily rotation about its axis
An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 145 km/h. exactly 2.5 s after the speeder passes, police officer steps on accelerator; if the police car's acceleration is 2.10m/s^2.
Jane and Jon, with masses of 50 kg and 60kg, respectively,stand on a frictionless surface 10m apart, What is JOhn's acceleration
a football punter accelerates a football from rest to a speed of 10 m/s during the time in which his toe is in contact with the ball, what average force does the punter exert on the ball
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