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A child ties a rock to a string and whirls it around in a horizontal circle.
Part A
Assuming a 1.46m -long string making 20.0? angle below the horizontal, find the speed of the rock.
Part B
Find the period of its uniform circular motion.
A 2.50 meter long copper wire has a mass of 0.25 kilograms. A magnetic field of 0.15 Teslas is oriented horizontally from south to north. What is the minimum current in the rod that would allow it to "float" in this magnetic field? What is the direct..
An object of negligible mass has an instantaneous position of .6 AU from the sun, an instant. velocity of 25 km/s, a direction of motion of 30 degrees radially outward from the sun, and a semimajor axis of .38 AU. What is the orbital eccentricity?
Compute the distance of two point's p1 and p2 in the x-y plane with the following Cartesian coordinates: p1= (-5m, +8m), p2= (+3m, +2m). Draw the position vectors into appropriate-points.
a block with a mass m and charge q is placed in an electric field e a i b j where a and b are constants. if the block
A copper pipe with an outer radius of 0.014 m runs from an outdoor wall faucet into the interior of a house. Find the inner radius of the pipe
In a double-slit experiment, the second-order bright fringe is observed at an angle of 0.62°. If the slit separation is 0.10 mm, then what is the wavelength of the light? I'm getting 5.4104e-6 nm? But I'm not sure what I'm doing wrong. I've tried it ..
A hollow sphere of radius 0.50 m, withrotational inertia I = 0.038 kgm2 about a line through its center of mass, rollswithout slipping up a surface inclined at 40° to the horizontal. At a certain initialposition, the sphere's total kinetic energy ..
Suppose two highly precise, identical clocks are synchronized and one clock is placed on the North Pole, how much will the clocks differ in time
q1. a rock is projected from the edge of the top of a building with an initial velocity of 14 ms at an angle of 36
A ping-pong ball has been electrostatically charged such that it has 2.5 x 1015 excess electrons. The ball has a massof 1.0 g. It is observed to float motionless in the presence of auniform electric field. What is the magnitude and direction of th..
The combination of an applied force and a frictional force produces a constant torque of 41 Nm on a wheel rotating about a fixed axis. Determine the magnitude of the frictional torque
Four point charges are arranged in a square with side length 1 meter. Charges qA and qD have charges of q= +1 uC, and charges qB and qC have charges of q= -1 uC. Point E exists at the center of the square.
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