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You are building a toy mobile, copying the design shown in the figure . Object A has a 1.0-kg mass.
What should be the mass of object B? The numbers in the figure indicate the relative lengths of the rods on each side of their supporting cords.
A uniform disk with mass m = 9.09 kg and radius R = 1.37 m lies in the x-y plane and centered at the origin. Three forces act in the +y-direction on the disk: 1) a force 317 N at the edge of the disk on the +x-axis, 2) a force 317 N at the edge of..
An electron acquires 6.4 x 10^-16J of kinetic energy when it isaccelerated by an electric field from plate A to plate B. What is the potential difference between the plates?
You are driving north on 107th Avenue at a speed of 28.7 mph. At what frequency do you year the siren
extension cords are often made from 1.0 mm diameter copper wire. a what is the resistance per unit length of this wire?
Two forces, F1 vector and F2 vector, act at a point. F1 vector has a magnitude of 8.40N and is directed at an angle of 65.0 degrees above the negative x axis in the second quadrant. What is the magnitude of the resultant force
The image of a very distant car is located 98 cm behind a convex mirror. What is the radius of curvature of the mirror? Draw a ray diagram to scale showing this situation.
Astronomers discover a binary star system that has a period of 96.0days. How far apart are the two stars in m
A mass is trapped on the x-axis. Its potential energy is given by U=-2x^3 -3x^2 +12x. Where x is i meters and U is in joules. A) Determine an expression for the force that acts on the mass as a function of position.
An electron is accelerated through 2450 V from rest and then enters a region wherethere is a uniform 1.80 T magneticfield. What are the maximum and minimum magnitudes of the magentic force acting on this electron?
a capacitor with capacitance c 4.10middot10-6 f is connected to an ac power source having a peak value of 6.0 v and f
Two scales on a voltmeter measure voltages up to 21.0 and 30.9 V,respectively. The resistance connected in series with thegalvanometer is 1530 for the 21.0-V scale and 3020 for the 30.9-V scale.
a cylinder with a piston contains 0.150 mol of nitrogen at 1.80 105 pa and 300 k. the nitrogen may be treated as an
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