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The hour hand on a certain clock is 9.0 centimeter long. Determine the tangential speed of the tip of this hand?
A 67 kg person sits on a 3.5kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.8 cm in diam. Determine the pressure exerted on the floor by each leg of the chair; Assume the weight is evenly distributed.
a small excursion boat with a flat deck bobs up and down excuting simple harmonic motion due to the waves on a lake.
A hollow non-conductiong sphere has a uniform charge density ?. The inner and outer radius of the sphere are r1 and r2m respectively. What is the total charge of this sphere
A metal sphere has an outer radius of R2= 20 cm. The inside is hollow up to a radius of R1= 10 cm, with the inside empty(vacuum). The total mass of the sphere is 2 kg. The sphere is fully submerged underwater? What is the total force on the sphere?
a string vibrates at its third-harmonic frequency. the amplitude at a point 30 cm from one end is half the maximum
A rock is thrown from the roof of a building, with an initial velocity of 10.0 m/s at an angle of 30.0 ° above the horizontal. What is the height of the building
You're designing a speaker, and you want the tweeter to handle almost everything above 1100 Hz, and woofer to handle almost everything below Hz. Find the capacitance that satisfies the design criteria
A boy pulls a box with a mass of 30 kg with a force of 25 N at 30 deg angle in the North East direction. Ignoringfriction, what is the acceleration of the box? What is the normalforce exerted on the box by the ground?
A jet airplane in level flight has a mass of 8.65 104 kg, and the two wings have an estimated total area of 94.0 m2. what is the speed of the air over the wings
A cyclist pedals a bicycle. The driving wheel accelerates from the rest to an angular speed of 6.4 rev/s in 3.8 revolutions. What is the angular acceleration of the wheel
A fire truck emitting a siren frequency of 1500 Hz speeds by you at 20.0 m/s (~45 mph). calculate the frequency of the siren as the engine approaches
A bucket filled with dirt of mass 20 kg is suspended by a rope that hangs over a pulley of mass 30 kg and radius 0.25 m. What is the speed of the bucket
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