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You focus sunlight on a piece of paper and find that the light seems to be most nearly focused between 24 and 25 cm from the lens. What is the uncertainty in the focal length of the lens, in cm? The focal length of the lens has an uncertainty of _____ cm.
Suppose that the dipole moment associated with an iron atom of an iron bar is 2.4 x 10-23 J/T. What is the dipole moment of the bar
Two forces, vector F 1 = (6.85i hat-3.10j hat) N and vector F 2 = (4.35i hat-8.35j hat) N, What are the components of the particle's velocity at t = 11.6 s
An archer fires an arrow horizontally off of a ravine that is 65 meters wide, What is the magnitude of the velocity with which the arrow strikes the other side
How much work is needed to push a 132- kg packing crate a distance of 2.35 m up an inclined plane that makes an angle of 26 o with the horizontal, when inclined plane is frictionless
the shear modulus of steel is 8.1x10^10N/m^2. a steel nail of radius 7.5x10^-4m projects 0.040m horizontally outward from thw wall. what is the vertical deflection of the other end of the nail
a charged cloud system produces an electric field in the air near earths surface. a particle of charge -2.2 x 10-9 c is
An automobile tire has a radius of 0.380 m, and its center moves forward with a linear speed of v = 18.0 m/s. Decide the angular speed of the wheel.(Assume that there is no slipping of the surfaces in contact during the rolling motion.)
A demonstration gyroscope consists of a uniform disk with a 41-cm radius, mounted at the midpoint of a light 58-cm axle, How fast is the gyroscope precessing, in units of rad/s, if the disk is spinning around the axle at 28 rev/s
While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 6.41 m/s. At what speed does the stone impact the ground
A small rigid object carries positive and negative 4.00 nC charges. It is oriented so that the positive charge has coordinates, Find the electric dipole moment of the object
The difference in potential between the accelerating plates of a TV set is about 26000 V. If the distance between these plates is 1.5 cm, find out the magnitude of the uniform electric field in this region.
A 7.80-g bullet moving at 560 m/s penetrates a tree trunk to a depth of 5.2 cm. Use work and energy considerations to find the average frictional force that stops the bullet
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