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A bridge of length 80 m and mass 57000 kg is supported at each end (points A and B on the picture below). A truck of mass 32000 kg is located 23 m from the left support A. Calculate the normal force on the bridge atpoint B (the right support). The accelerationof gravity is 9.8 m/s2. Answer in units of N
The accepted value for the suns intensity at the earth is measured on an area with its normal along the suns "ray". Calculate the temperature of the sun
A mass is attached to a vertical spring, which then goes into oscillation. At the high point of the oscillation, What is the period of oscillation
If a bungee cord is stretched horizontally to a length of 2.6 , the tension in the cord is 1.9. What is the tension in the 3.5-m-long cord
A 150-N sled is pulled up a 28 degree slope at a constant speed bya force of 100N. What is the coefficient of kinetic friction between sled and slope
An 8.40 gram bullet has a speed of 1.13 km/s. Find the bullet kinetic energy if its speed is doubled
George and Martha are at a NASCAR race and as the race car made theturn to their right and rushed towards them the frequency theyheard was F0 = G5 or 821 Hz. what is the velocity of the race car
A cylindrical region of space of radius R contains a uniform magnetic field B with direction into the page. Find the magnitude and direction of the induced electric field at r = 5.00 cm if the magnetic field changes at a constant rate from 0.500T to..
The positively charged plate of a parallel-plate capacitor has a charge equal to Q. Find the dielectric constant of the material
A current of 3.0 A is flowing through a 40 cm long solenoid with 500 turns. What is the radius of the circular path of the proton
You want to design a helium-filled balloon that will lift a whole payload of 1350 kg. Find what volume of helium is required to just barely lift this payload
A 5kg piece of metal displaces 0.75L of water when submerged. What is the buoyant force on the piece of metal? Give your answer in Newtons
A new fabric is made to help athletes stay cool. It has a conductivity constant of 898.785 J/(s m K). what is the power of the materials thermal conductivity
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