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A rectangular picture frame weighing 4.0 N is supported by a wire attached to its two top corners and passed over a nail in the wall. The top edge of the picture frame is horizontal. What force is exerted by each half of the wire if the angle between them is 120 o ? 3) Three force act simultaneously on point J. One force is 10.0 [N], the second is 1
Assume all temperatures to be exact, and neglect significant figures for small changes in dimension. Concrete highway slabs are poured in lengths of 9.00m. How wide should the expansion gaps between the slabs be at a temperature of 15degreeC to ensur..
A charge of -0.62 m/C with an unknown mass hangs vertically from a string. A uniform electric field, which runs parallel to the ground (in the + x direction) is then turned on.
if two springs are attatched to one another and a mass is added at the bottom, how would one find the potential energy of the springs
350J of energy are transferred to a system in the form of heat while the thermal energy increases by 160J
A small sphere with a mass m = 0.150 kg is suspended by a light string from a vertical post mounted at the edge of a merry-go-round with a radius R = 0.440 m. Calculate the speed of the sphere
Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 1 kHz. What beat frequency do you observe
An 250 kg air hockey puck is tied to a peg. The puck is given a push and moves around the peg at a constant speed in a circle. What is the acceleration of the puck
Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.7 kg · m2 and an angular velocity of +7.0 rad/s. Disk B is rotating with an angular velocity of -9.6 rad/s. The two disks are then linked together without the aid of a..
A crate is dragged 4.0m along a rough floor with a constant velocity by a worker applying a force of 450N to a rope at an angle of 30? to the horizontal. What is the total work done on the crate
an object having a mass of 8.0 g and a charge of 10.0 x 10-5 c is placed in a uniform electric field e where ex 2.00 x
6.00g of nitrogen gas at 22.0 degree celsius and an initial pressure of 4.00atm undergo an isobaric expansion until the volume has tripled, What amount of heat energy is transferred from the gas as its pressure decreases
Consider an airplane of wing area 6.8 m^2 (both wings combined) flying through air of density 1.13 kg/m^3. What is the net upward lift force on the plane
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