Physics, 21.01.2021 22:20, trejo282961
5. The Doppler effect applies to light waves as well as sound waves. Astronomers use this to measure the motion of stars and galaxies. In 1929, Edwin Hubble
discovered that light from distant galaxies was shifted away from the blue end of the spectrum and towards the red end of the spectrum Red light has a longer
wavelength (and a lower frequency than blue light. What could Hubble conclude about these galaxies?
O A The distant galaxies are growing smaller
OB. The distant galaxies are growing larger
OC. The distant galaxies are moving towards the Earth
D. The distant galaxies are moving away from the Earth
Answers: 2
Physics, 22.06.2019 03:50, am2garcia5
A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c
Answers: 3
Physics, 22.06.2019 11:30, smilequi9653
Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.
Answers: 1
Physics, 22.06.2019 18:30, kayleahrayne
Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2. how much is the spring compressed x from its natural length? 1) x = v0*sqrt(k/(mg)) 2) x=v0*sqrt(m/k) 3) x=v0*((mk)/g) 4) x=v0*sqrt(k/m) 5) x=v0*(m/kg) 6) x=v0*sqrt((mg)/k) 7) x=(v0)^2/(2g) 8) x=v0*(k/(mg)) 9) x=(v0)^2/(2m) 10) x=v0*((mg)/k)
Answers: 3
5. The Doppler effect applies to light waves as well as sound waves. Astronomers use this to measure...
Mathematics, 23.01.2020 08:31
Mathematics, 23.01.2020 08:31
Mathematics, 23.01.2020 08:31
Mathematics, 23.01.2020 08:31
Mathematics, 23.01.2020 08:31