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The angular speed of a propeller on a boat increases with constantacceleration from 10.9 rad/s to 24.0 rad/s in 2.20 revolutions. What is the acceleration of the propeller?
The current in a solenoid with 21 turns per centimeter is 0.45A, Find the magnitude of the net magnetic field a radial distance of 0.70 cm from the straight wire.
Two very thick equally-magmetized square plates of side 0.23m and of mass 20 g, Calculate the B field between the two plates, if the distance between them is 0.123 cm
A horse walks in a 24 ft diameter circle, making 144 trips around the circle in one hour. Using the currently accepted value of 746 watts for 1 horsepower, calculate the force in pounds with which the horse must have been pulling.
Shaving/make-up mirrors typically have one flat and one concave (magnifying) surface. What is the focal length of the mirror
Find the electric field strength from the wire. How long is each spring when hanging as shown.
Standing waves on a 1.7m -long string that is fixed at both ends are seen at successive frequencies of 36 Hz and 54Hz. What is the fundamental frequency
salt water has a greater density than freshwater. a boat floats in both freshwater and saltwater. the buoyant force on the boat in salt water is __________ than in freshwater
A certain atom of has 73 protons. Assume that the nucleus is a sphere with radius 6.54 fm and with the charge of the protons uniformly spread through the sphere. At the nucleus surface what is the magnitude of the electric field produced by the proto..
A college student is working on her physics homework in her dorm room. Her room contains a total of 6*10^26 gas molecules. As she works, her body is converting chemical energy into thermal energy at a rate of 125 W.
A toy balloon is filled with helium gas He at 1 atm and 28 degree C If the volume of the balloon is 0.024m^3 , how many atoms does it contain
When a light bulb is connected across the terminals of a battery, the battery delivers 20.6 W of power to the bulb. A voltage of 10.4V exists between the terminals of the battery, which has aninternal resistance of 0.406. What is the emf of the batte..
A damped mass-spring system oscillates at 165 Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 7.0 cm and the energy of the oscillating system is then 70 J.
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