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An astronaut is traveling in a space ship that has a speed of0.99c relative to the Earth. The astronaut measures hispulse rate at 75 beats per minute. Signals generated by the pulserate are radioed to Earth. What pulse rate does the Earth observer measure?
when you place a saltshaker 30 cm from your magnifying glass a real image forms 30 cm from the lens on the opposite
question a system consists of 0.697 kg of water at 80 degrees c. a paddle wheel does 42 kj of work stirring the water.
A 5.0-, 0.732- wire is used to support two uniform 235- posts of equal length, What is the frequency of the sound this wire produces
An athlete performing a long jump leaves the ground at a 34.4? angle and lands 7.65m away, What was the takeoff speed
Huck Finn walks at a speed of 0.70 across his raft (that is, he walks perpendicular to the raft's motion relative to the shore). The raft is traveling down the Mississippi River at a speed of 1.50 relative to the river bank.
The resultant displacement has a magnitude of 170 cm and is directed at an angle of 65.0° to the positive x axis. Find out the magnitude and direction of the second displacement.
A 0.99-cm-diameter microscope objective has a focal length of 2.6 mm. It is used in visible light with a wavelength of 532 nm. What is the objective's resolving power if used in air
a globular cluster at its farthest point from the galactic center is at a distance of 104 pc.what is its period of
a cowboy fires a silver bullet of mass 5g with a muzzle speed of 257 ms into the pine wall of a saloon.what is the
An empty rubber balloon has a mass of 0.0105 kg. The balloon is filled with helium at adensity of 0.181 kg/m3. what is the tension in the line
Angular speed is the increased to 10 rad/2 over the next 4 seconds. Illustrate what is the average tangential speed at the edge of the grindstone during this time
A light string can support a stationary hanging load of 24.6 kg before breaking. What range of speeds can the object have before the string breaks
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