Which of the following is evidence that supports the big bang theory? A. Light from other galaxies always travels at the same speed, which shows that the galaxies are moving away from Earth. B. Light from other galaxies sometimes takes thousands of years to reach Earth, which shows that the galaxies are moving away from Earth. C. Light from other galaxies shows that light elements formed before heavier elements. D. Light from other galaxies appears shifted toward the red end of the spectrum, which shows that the galaxies are moving away from Earth.

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant