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An astronaut measures her mass by means of a device consisting of a chair attached to a large spring. The period of oscillation she undergoes when set into motion is used to determine her mass. If the spring constant is 1250 N/m and 27 seconds is required for her to undergo 10 full oscillations what is the mass of the astronaut and chair?
Two 9.0 cm--diameter metal plates are 1.2 cm apart are charged to 12.5 nC . They are suddenly connected together by a 0.218mm, What is the maximum current in the wire
Suppose a star the size of our Sun (R0 = 695,500 km) rotates at a speed of 1.0 revolution every 12 days. If it were to undergo gravitational collapse to a neutron star of radius 11 km, what would its new rotation speed be? (rad/s)
One end of a 5.0 m long light string is attached to the ceiling and a small rock of mass m is attached to the other end of the string. What is the mass m of the rock
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, How fast are the waves traveling
A 5.17-g bullet is moving horizontally with a velocity of +340 m/s, where the sign + indicates that it is moving to the right, What is the velocity of the second block after the bullet imbeds itself
A 10 kg balloon is filled with helium. Its volume is 200 cubic meters. How much gold can it carry in air? How much gold can it carry in water?
An artificial satellite circling the Earth completes each orbit in 142 minutes. Find the altitude of the satellite
q1. identical samples containing 32p are measured for a period of 1 hr in a counter having an efficiency of 44 percent
The magnetic force exerted on a 3.0-m segment of straight wire is 1.9 N. What is the angle between the wire and the magnetic field
A car traveling on a flat (unbanked), circular track accelerates uniformly from rest with a tangential acceleration of 2.20 m/s2. The car makes it one quarter of the way around the circle before it skids off the track. From these data, determine the ..
The radar system transmits 18.75 GHz from a circular antenna with a diameter 2.3m. at a range of 6.2km, what is the smallest distance that two speedboats can be from each other and still be resolved as two objects?
A 1.23-kg box slides up an incline plane with a speed of 8.6 m/s. If the angle of the plane with respect to the horizontal is 11 degrees, how long will it take for the box to come to rest
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