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A spaceship leaves earth (event A), travels to Alpha Centauri (which is 4.4 y distance away), and then returns (event B) exactly 12.0 y later. If the spaceship's acceleration time is very short, so that it spends virtually all its time traveling at a constant speed, estimate the time measured between events A and B by the ship's clock.
Comet Halley has an orbital period of about 75 years. Determine the average distance of Comet Halley from the sun in AU
The wavelength of visible light varies from 0.40 ?m to 0.70 ?m as the color of the light changes from violet to red. Calculate the energy of a photon whose wavelength is 0.43 ?m
A star of radius 7.8 × 105 km rotates about its axis with a period of 66 days. Estimate the period of the neutron star
When a resistor is connected across the terminals of an ac generator (104 V) that has a fixed frequency, there is a current of 0.545 A in the resistor. determine the impedance of the series combination
Towns A and B in are 80.0 km apart. A couple arranges to drive from town A and meet a couple driving from town B at the lake, L. The two couples leave simultaneously and drive for 2.50 . Car 1 has a speed of 90.0 km/h. If the cars arrive simultaneous..
In the fusion of a deuterium nucleus (one proton, and one neutron) with a tritium nucleus (one proton, two netrons), the deuterium nucleus must have enough initial kinetic energy to overcome the repulsion force due to the electrostatic interaction..
A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 475 kg. find the length of time the car could run before the flywheel would have to be brought back up to speed
Before embarking on a car trip from Michigan to Florida to escape the winter cold, you inflate the tires of your car to a manufacturer-suggested pressure of 32 psi while the outside temperature is 24 °F and then make sure your valve caps are airtight..
Steel wire with mass 29 g and length 1.14 m is strung on a bass so that the distance from the nut to the bridge is 1.10 m. Compute the linear density of the string
The K-shell ionization energy of iron is 8500 eV, What is the wavelength of Kalpha X-rays emmited by iron
Because Earth's rotation is gradually slowing, the length ofeach day increases: The day at the end of 1.0 century is 1.0 mslonger than the day at the start of the century. In 16 centuries, what is the total (in hours) of the daily increases in tim..
A block of mass 12.0 kg slides fromrest down a frictionless 40.0° inclineand is stopped by a strong spring with k = 4.0*104 N/m. The block slides 3.00 m from the point of release to the pointwhere it comes to rest against the spring. When the block ..
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