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A lunch tray is being held in one hand, as the figure illustrates. The mass of the tray itself is 0.167 kg, and its center of gravity is located at its geometrical center. On the tray are a 1.11-kg plate of food and a 0.262-kg cup of coffee. Get (a) the force exerted by the four fingers (b) the force exerted by the thumb. Both forces act perpendicular to the tray, which is being held parallel to the ground.
With the power supply disconnected, the dielectric material is removed and the potential difference between the plates is measured to be 500 V. What is the dielectric constant of the material that was at first used to fill the gap between the plates.
en boxes, each 21.0 cm high and weighing 235 N, initially are all side by side on the floor. Compute the power necessary to stack the boxes
A converging lens has a focal length of f = 27 cm. An object is placed 37 cm from the lens. Find the size of the image
The link between portfolio level objectives with portfolio success factors that are achieved through individual projects and points out how contributes to strategic fit, use of synergies, etc.
how can you tell if there is a difference of potential between two points? urgent? b is work required to move a charge
A stone is dropped from the roof of a building; 2.10s after that a second stone is thrown straight down with the initial speed of 18 m/s, and both stones hit the ground at the equal time. How long did it take for the first stone to hit the ground.
the decay constant of radon is .181day. a sample of radon contains 6.00x108 radon atoms. how many atoms are left after
A stone thrown horizontally from the top of a 26.0-m tower hits the ground at a point 21.0 m from the base of the tower. Find the speed at which the stone was thrown
The area of a typical eardrum is about 5.0 × 10?5 m2. Calculate the sound power incident on an eardrum at the threshold of pain
Three charges are at the corners of an isosceles triangle, Calculate the amount of work required to assemble this system of charges, assuming they are brought in from infinity
An electron is observed traveling at a speed of 25.7·106 m/s parallel to an electric field of magnitude 14000 N/C. How far will the electron travel before coming to a stop?
A 130kg mail bag hangs by a vertical rope 3.6mlong. A postal worker then displaces the bag to a position 2.2m sideways from its original position, What horizontal force is necessary to hold the bag in the new position
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