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The drawing shows an A-shaped ladder. Both sides of the ladder areequal in length. This ladder is standing on a frictionlesshorizontal surface, and only the crossbar (which has a negligiblemass) of the “A” keeps the ladder from collapsing. Theladder is uniform and has a mass of 27.0 kg. Determine the tension in the crossbar of the ladder.
As the police car approaches a brick wall it emits a sound at 800Hz. The speed of the car is 100km/h. Find the beat frequency recorded by the driver of the police car
The speed of a bullet as it travels down the barrel of a gunis given by v=-50000t2-300t where v is in km/s and t inseconds The acceleration of the bullet as it leaves the gun is zero.
the crate shown is held against wedge b by a spring. the spring is 96.0 of its original uncompressed length l2.75m and
For ideal gas CO2, it is compressed from an initial state of 120Kpa, 340k to a final state of 900kpa, 1200k. Determine the specific entropy change
Three positive particles of equal charge +11 uC, are located at the corners of an equilateral triangle of side 15.0 cm. calculate direction of the net force on each particle
an object is located 13.0 cm in front of a convex mirror the image being 6.50 cm behind the mirror. a second object
A 494 g air-track glider attached to a spring with spring constant 7.5 N/m is sitting at rest on a frictionless air track. What is the period of the subsequent oscillations
A researcher observes hydrogen emitting photons of energy 2.55eV. What are the quantum numbers of the two states involved in the transition that emits these photons
Suppose manufactures increase in size of compact disks. By what factor will the moment of inertia increase
Calculate the inductance of a solenoid with 275 turns if the length of the solenoid is 30 cm and its radius is 2.5 cm
A 1.4cm tall object is 4.0cm from a concave mirror. Ifthe image is 4.0cm tall, how far is it from the mirror
A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9 x 10^7 m. What would be the magnitude of the gravitational force exerted on the satellite by the planet if the radius of the orbit were increased to 3.6 x 10^7..
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