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A child sits at the edge of a plarform rotationg at 30 rpm. The platform is 10 m. in diameter. What is the period of the motion and what is the child's speed?
An aircraft weighing 892 N is accelerated at 9.9 m/s/s for 5 seconds, What is the force required to launch the aircraft
A metal wire 1.3mm in diameter and 1.8m long hangs vertically with a 5.4-kg object suspended from it. what is the value of the Young's modulus for the metal
A wistle (frequency = 594 Hz) is essentially a tube with one end open. If the 500 Hz sound is the 1st harmonic, what is the length of the whistle
A double-slit experiment has slit spacing 0.140mm. What should be the slit-to-screen distance L if the bright fringes are to be 5.00mm apart when the slits are illuminated with 652nm laser light
A movig particle encounters an external electric field that decreases its kinetic energy from 9960 eV to 7700 eV as the particle moves from position A to position B. Determine the charge of the particle
two blocks of mass 3 kg and 6 kg resp are placed on a smooth horizontal surface. they are connected by a light spring
A 1100kg car traveling south at 24 m/s with respect to the ground collides with and attaches to a 2550kg delivery truck traveling east at 16 m/s. Determine the direction of the velocity of the two vehicles
Describe what are the (a) magnitude and (b) direction of the boat's velocity relative to the ground? (c) How long does the boat take to cross the river?
A loop of wire (resistance = 2.0 m?) is positioned as shown with respect to a long wire which carries a current. If d = 1.0 cm, D = 6.0 cm, and L = 1.5 m, what current is induced in the loop at an instant when the current in the wire is increasing at..
a microwave oven generates a sound level of 37.3 db when consuming 1.6 kw of power. estimate the fraction of this power
A 1,216-kg car drives through a turn with radius 42 m. The coefficient of static friction is 0.9 and the coefficient of kinetic friction is 0.52. find the maximum speed (constant) at which the car can negotiate the turn
two parallel plates each of area 6.27 cm2 are separated by 3.60 mm. the space between the plates is filled with air. a
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