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Bob gauges the West wall of the room four times, and calculates the mean of his data set to be 6.293 m and the and standard deviation to be 0.032 m. Compute the standard deviation of the mean (in meters) for this data set.
An athlete at the gym holds a 2.5 kg steel ball in his hand. His arm is 70 cm long and has a mass of 4-kg. What is the magnitude of the torque about his muster if he holds his arm straight out to his side, parallel to the floor.
An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has amass of 4.9 × 104 kg, and the force causes its speed to change from 7500 to 4800 m/s.
a .5-kg object is attached to a spring of spring constant 30 nm and released from rest at t0 from a position .25 m from
a pickup truck carries cans of paint in the back bed. the coefficient of static friction between the cans and the bed
In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.30 106 m/s. Find the centripetal acceleration of the electron
a film of oil lies on wet pavement. the refractive index of the oil exceeds that of the water. the film has the minimum
A camera has a lens with a focal length of 24.9 cm. how far from the film should the lens be placed
a 3-kg object attached to a spring oscillates on a smooth horizantial surface. its position versus time is given by the
Calculate the moment of inertia of a skater given the following information. THe 65 kg skater is approximated as a cylinder that has a .110 m radius
what is its kinetic energy at the end of the interval. How high a tree would a 80 kg person have to climb to increase his gravitational potential energy relative to the ground by that amount.
A 45.0 cm long organ pipe is filled with air at 14°C and is open at both ends. The velocity of sound in air at 0.000°C is 331 m/s. Another 45.0 cm long organ pipe is filled with air at 27.0°C and is open at both ends. What is the beat frequency betwe..
A sample of helium behaves as an ideal gas as it is heated atconstant pressure from 273 K to 343 K. what is the mass of helium present
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