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Question: The sphere at A is given a downward velocity v0 of magnitude 5 m/s and swings in a vertical plane at the end of a rope of length l = 2 m attached to a support at O. Determine the angle u at which the rope will break, knowing that it can withstand a maximum tension equal to twice the weight of the sphere.
A car is traveling at 8.43 km/hr. The tires have a radius R = 38:4 cm. (a) What is the angular speed of the tire (in SI units)? (b) What is the centripetal acceleration (m/s^2) of a piece of tire on the outer edge?
Assume you are 65.00 cm from a plane mirror. What area of the mirror is used to reflect the rays entering one eye from a point on the tip of your nose if your pupil diameter is 5.0 mm.
If this power plant has an efficiency of 49% of the efficiency of an ideal engine operating at the same temperatures, what is the magnitude of the heat.
A cube of aluminum has an edge length of 20 cm. Aluminum has a density 2.7 times that of water (1 gram/cm$) and a specific heat 0.217 times that of water (1 cal/g °C). When the internal energy of the cube increases by 47000 cal its temperature increa..
Water flows over a section of Niagara Falls at a rate of1.20x106 kg/s and falls 50.0 m. What is the power dissipated by the water fall
A few more questions (3) My teacher wasn't good at explaining these a. What are two equations for the energy of light? Identify each variable.
A certain microwave oven produces microwaves of frequency 2450 MHz by a power of 500 W. How long must it take to heat 556 g of water, initially at room temperature, to the boiling point? Suppose that all the microwave energy is engrossed by the water..
A small block with mass m1 rest on a frictionless horizontal tabletop a distance r1 from a hole in the center of the table. A light, stretchless string tied to the small block passes down through the hole, and a larger block with mass m2 is suspen..
A series circuit with a 12kΩ resistor, a 12.0 V battery and a capacitor has a time constant of 55 μs. Compute the capacitance of the circuit? Compute the time it takes for the energy stored in the capacitor to be two thirds of its maximum value?
A hard disk in your computer spins at 5400 rpm. if this disk turns through 12 revolutions before coming to a stop, find the disks angular acceleration
Discover the two lowest-order non vanishing terms in the multiple expansion of the potential due to a uniformly charged ring of radius a carrying total charge Q. take the origin at the center of the ring, and neglect the thickens of the ring.
In the figure 29-49, four long straight wires are perpendicular to the page, and their cross sections form a square of edge length a = 30 cm. The currents are out of the page in wires 1 and 4 and into the page in wires 2 and 3, and each wire carri..
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