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When a large star becomes a supernova, its core may be compressed so tightly that it becomes a neutron star, with a radius of about 10 km (about the size of a typical city). If a neutron star rotates once every 0.75 seconds,
(a) what is the speed of a particle (in km/s) on the star's equator and
(b) what is the magnitude of the particle's centripetal acceleration?
What is the coefficient of kinetic friction between the crate and the floor. what height will the stream of water strike.
A telephoto lens with focal length of 120mm has f-numbers ranging from f/2.8 to f/22, What is the diameter of the lens aperture at f/2.8? in millimeters
A particle moves along the x-axis according to the equation x(t) = 2.0 + 3.0t2 - 1.0t3, where x is in meters and t is in seconds. What is the position of this particle when it achieves its maximum speed in the positive x-direction? What is its spe..
How several 90-rm W, 120-rm V light bulbs can be connected to a 20-rm A, 120-rm V circuit without tripping the circuit breaker.
During exercise, a person may give off 145kcal of heat in 20min by evaporation of water (at 20?C)from the skin. How much water has been lost
federal statute requires that a car's bumper be designed to withstand a 2.50 mph (1.12m/s) collision with an immovable object without damage to the body of the car. Calculate the average force on a bumper
An inductor has a 56.6-? reactance when connected to a 60.0-Hz source. What is the maximum current in the inductor
It is expected to measure an X-ray peak which occurs at an angle of around 31.6g. Alter viewing the scale and pointer, with what accuracy w ill you quote the result?
A Ferris wheel is moving at an initial angular velocity of 1.0 rev/53 s. If the operator then brings it to a stop in 2.8 min, what is the angular acceleration of the Ferris wheel
q1. a demented scientist creates the new temperature scale the z scale. he decides to call the boiling point of
A man walks at 3 m/s on a still day along the line between two fire stations. Find the apparent frequency of each whistle
A projectile is shot from the edge of a cliff h = 105 m above ground level with an initial speed of v0 = 145 m/s at an angle of 37.0° with the horizontal. Find the maximum height above the cliff top reached by the projectile
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