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A ball of mass 1.34 kg is attached to a vertical rod by two strings. The top string is 1.60 m long and makes a 30° angle with the rod, while the bottom string makes a 45° angle with the rod. The rod is rotated at 1 revolution every 1.20 s.
Find the tension in each string.
At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 29.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns during an angle of 440 rad as it coasts to a..
A block of mass m1 on a smooth, horizontal surface is connected to a ball of mass m2 by a lightweight cord over a lightweight , frictionless pulley , Determine the normal force exerted by the table on the block
A heat engine operates in a Carnot cycle between 83.0°C and 353°C. It absorbs 21004 J of energy per cycle from the hot reservoir. What is the mechanical power output of this engine
a motor is designed to operate on 132 v and draws a current of 9.4 a when it first starts up. at its normal operating
During a solar eclipse, the Moon, Earth, and Sun all lie on the same line, with the Moon between the Earth and the Sun. What force is exerted by the Sun on the Moon?
Suppose the mica is 1.5 thick (and therefore fills the space between the plates).The charges on the plates are equal and opposite and of magnitude 380.
A piece of sandston with a bulk volume of 1.3 cc is contained ina 5-cc cell filled with helium at 760 mm Hg. Temperature ismaintained constant and the cell is opened to another evacuatedcell the same volume. The final pressure in the two vesselsis 33..
A monochromatic light source emits a wavelength of 490 nm in air. When passing through a liquid, What is the liquid's index of refraction
A uniform steel beam has a mass of 1860 kg. On it is resting half of an identical beam, What are the vertical support forces
The boiling point of liquid nitrogen is 77.3 K at atmospheric pressure. What is this temperature on the Celsius scale? What is this temperature on the Fahrenheit scale
Heavy rains have flooded your professor's basement to a depth of 6 cm. This basement is 12 m by 10 m in area. You have a hose of diameter 1.7 cm and can run the hose from the water in the basement
A boy is trying to retrieve his toast from a toaster using a metal knife. He touches one of the wires inside, which is connected to 120 V. What is the current through his body
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