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An irregularly shaped piece of metal has a weight of 8.840 N. It is suspended from a scale, which reads 7.320 N when the piece is submerged in water. What is density of the piece of metal? (answer in kg/m³)
A certain digital camera having a lens with focal length 7.5 cm focuses on an object 1.80m tall that is 4.35m fromt he lens. How far must the lens be from the photocells
a diver runs horizontally with a speed of 1.2 m/s off a platform that is 5.0 m above the water. What is the speed just before striking the water
To which, according to the rotational analog of Newton's second law, is the angular acceleration experienced by an object directly proportional?
A 30kg child slides down a playground slide at a constant speed. find the magnitude of the kinetic friction force acting on the child
A 35 N hand and forearm are held at a 45 degree angle to the vertically oriented humerus. how much force must be exerted by the forearm flexors to maintain this position
An experimental measurement has a result 7.95 +- 0.01, and a predicted value of 8.00. What is the percent uncertainty in the measurement
A frog in a hemispherical bowl finds that he just floats without sinking in a fluid whose density is 1.35 g/cm^3. If the bowl has a radius of 6cm and negligible mass, what is the mass of frog.
A pet-store supply truck moves at 25m/s north along a highway. Inside, a dog moves at 1.85m/s at an angle of 35° east of north. What is the velocity of the dog relative to road.
the planes speed when landing in still air is 20 m/s. what is the speed relative to the ground if it lands with the 10 m/s wind
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 2.19 106 m/s. Find the centripetal acceleration of the electron
A circular loop of wire having a radius of 6.0 cm carries a current of 0.14 A. A unit vector parallel to the dipole moment of the loop is given by 0.40i -0.92j, Find the magnetic potential energy of the loop
A pitcher throws a curveball that reaches the catcher in 0.59 s. The ball curves because it is spinning at an average angular velocity of 380 rev/min on its way to the catcher's mitt. What is the angular displacement of the baseball as it travels ..
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