A batter hits a home run in which the ball travels 110 m horizontally with no appreciable effects of air. If the ball left the bat at 50° above the horizontal just above ground level, how fast was it hit?

What will be an ideal response?


33 m/s

Physics & Space Science

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Which of the following statements about open clusters is true?

A) All stars in the cluster will evolve similarly. B) All stars in the cluster have approximately the same mass. C) All stars in the cluster are approximately the same color. D) There is an approximately equal number of all types of stars in the cluster. E) All stars in the cluster are approximately the same age.

Physics & Space Science

Which of the following is TRUE?

A) The center of the universe is located at a point about 200 Mpc from us in the center of a cluster of galaxies. B) We measure a redshift for roughly half of the galaxies that we observe, and for the others we measure a blueshift. C) It is possible for galaxies that are very distant to actually move through space at a speed several times the speed of light. D) A redshift occurs when a photon loses energy and slows down as it moves through space. E) We see distant galaxies as they were billions or even tens of billions of years ago.

Physics & Space Science

Chris and Jamie are carrying Wayne on a horizontal stretcher. The uniform stretcher is 2.00 m long and weighs 100 N. Wayne weighs 800 N. Wayne's center of gravity is 75.0 cm from Chris. Chris and Jamie are at the ends of the stretcher. The force that Jamie is exerting to support the stretcher, with Wayne on it, is

A. 250 N. B. 300 N. C. 350 N. D. 400 N. E. 550 N.

Physics & Space Science

The coldest temperatures for people in the Southern hemisphere are experienced during

spring. fall. summer. winter.

Physics & Space Science