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A bag of cement weighing 275 N hangs in equilibrium from three wires as suggested in the figure below. Two of the wires make angles θ1 = 56.0° and θ2 = 42.0° with the horizontal. Assuming the system is in equilibrium, find the tensions T1, T2, and T3 in the wires. T1 = N T2 = N T3 = N
A jet plane lands with a speed of 114 m/s and can accelerate at a maximum rate of ?4.20 m/s2 as it comes to rest. what is the minimum time needed before it can come to rest
The space shuttle is in a 300km -high circular orbit. It needs to reach a 610km -high circular orbit to catch the Hubble Space Telescope for repairs, How much energy is required to boost it to the new orbit
A ball of mass 0.25 kg is attached to a string 0.750 m long. The ball is swung in a pendulum-type motion such that it has a speed of 6.40 m/s, What is the corresponding tension in the string
What is the frequency of ultrasound in a medium if he wave length is 3.0 x 10^-3 m and velocity is 1300 mm/ms.
A 50 kg ballet dancer stands on her toes during a performance with four square inches (26.0 cm2) in contact with the floor. What is the pressure exerted by the floor over the area of contact (a) if the dancer is stationary and (b) if dancer is lea..
A 1128 kg car and a 2210 kg pickup truck approach a curve on the expressway that has a radius of 272 m. find the normal force on the truck to the highway surface
Wire 1 and 2 are made of the same metal. What is the ratio p2/p1 of the resistivities of the two wires
A 100 block on a frictionless table is firmly attached to one end of a spring with = 27 . The other end of the spring is anchored to the wall. A 22 ball is thrown horizontally toward block with a speed of 5.5.
In an X-ray tube electrons strike a tungsten target (W or "wolfram") after being accelerated through a potential difference V0. Estimate the minimum value of V0 required to observe the Kalpha peak.
Suppose that electrical energy costs about $0.098/(kW · hour), If the electric potential provided by the electric company was 120 V, what was the average current in all circuits in the author's house
Two equally charged, 1.00 {\rm g} spheres are placed with 2.00 {\rm cm} between their centers. What is the magnitude of the charge on each sphere
A 11.0 cm -diameter compressed-air tank is 70.0 cm tall. The pressure at 30.0 degrees C is 130 atm. How many moles of air are in the tank
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