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Question1
A 24 {rm g}, 3-cm-diameter thin, hollow sphere rotates at 30rpm about a vertical, frictionless axis throughout its center. A 4g bug stands at the top of the sphere. He then walks along surface of the sphere until he reaches its “equator.” 30 {rm rpm} about a vertical, frictionless axis through its center. A 4 {rm g} bug stands at the top of the sphere. He then walks along the surface of the sphere until he reaches its “equator.”
When he reaches the equator, the sphere is rotating at how many rpm?
Question2
A boat heading due north crosses a 168-m wide river with the speed of 10.0 km/h relative to the water. The water in river has a uniform speed of 5.00 km/h and flows due East.
(a) What is velocity of the boat relative to the shore?
(b) How long does it take a boat to cross the river?
(c) How for downstream does a boat end up?
A 2.5kg block slides along a frictionless surface at 1.6m/s. A second block, sliding at a faster 4.0m/sPh, what was the mass of the second block
A tube is open only at one end. A certain harmonic generted by the tube has a frequency of 470Hz. The next higher harmonic has a frequency of 555Hz. The speed of sound in air is 343m/s.
A vector has an x-component of ?30.0units, Find the magnitude and direction of the vector
Two polarizers are oriented at 48° to each other and polarized light incident on them. what was the initial polarization direction of the incident light
In a television set the power needed to operate the picture tube comes from the secondary of a transformer. Find the current in the primary
Illustrate what is the coefficient of static friction between the chair and the floor? What is the coefficient of kinetic friction between the chair and the floor?
What is new angular speed of the merry-go-round
Find the moment of inertia of the plate for an axis that lies in the plane of the plate, passes through the center of the plate, and is perpendicular to the axis in part A
One of the loudest sounds in recent history was that made by the explosion of Krakatoa on August 26-27, what was the decibel level on Rodriguez Island
Your forehead can withstand a force of about 6.0kN before fracturing while your cheekbone can only withstand about 1.3 kN. what is the magnitude of the balls deceleration
What is the pressure at the bottom of a swimming pool which is 12ft deep and contains fresh water.
Jupiter emits radio waves and also visible light (reflected Sunlight). Which of the following statements about the light we detect from Jupiter is true.
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