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If our sun/solar system was formed in a dense cluster (as opposed to a sparse cluster) where are the rest of the stars. Is it possible to find any of them? How can radioisotopes be used to determine we were blasted by a supernova billions of years ago? What are radioisotopes and which ones were found/studied?
Two point charges totaling 9.00 µC exert a repulsive force of 0.250 N on one another when separated by 0.537 m. What is the charge on each
The Sun is approximately a sphere of radius 6.963 105 km, at a mean distance a = 1.496 108 km from the Earth. calculate its surface temperature
A space traveler weighs 535 N on earth. What would the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth.
A certain gyroscope consists of a uniform disk with a 56 cm radius mounted at the center of an axle that is 13 cm long and of negligible mass. what is the precession rate
An electric motor with a 2.7-hp output drives a machine with an efficiency of 35%. What is the energy output of the machine per second
An unstretched spring is 13.0 cm long. When you hang an 845 g weight from it, it stretches to a length of 16.0 cm. What is the force constant (in N/m) of this spring
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
What is the electric potential energy in joules of two electrons separated by 1.33 nm, What would be it be if the separation was doubled
A 4.1-kg bucket of water is raised from a well by a rope. find the force exerted by the rope on the bucket
A molecule of DNA (deoxyribonucleic acid) is 2.35 µm long. The ends of the molecule become singly ionized: Determine the effective spring constant of the molecule
A circular loop in the plane of a paper lies in a 0.85 T magnetic field pointing into the paper. The loop's diameter changes from 20.5 cm t0 5.6 cm in 0.55 s, What is the magnitude of the average induced emf
A 5.0- kg block oscillates with an amplitude of 0.090 m on a light spring of constant k = 28.0 N/m. What is the maximum value of the block's velocity
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