An alien spacecraft flies directly over a football stadium at a speed of 0.50c. if the proper length of the field is 100 yards, what field length is measured by the crew of the alien spacecraft?

How do oceanographers define salinity? A - number of grams of chlorine per liter of water. B - number of milligrams of dissolved soduim per milliliter of water. C - number of grams of dissolved sulfur salt per kilogram of water.

1) How much work does it take to accelerate a 8.2 kg object from rest to 19 m/s?

A car rounds a flat curve and experiences a centripetal force directed toward the center of the curve and perpendicular to the direction of its motion.

Cars with hybrid and electric motors what?

Two examples of ways that physicists model the physical world

What conversion factor is needed to change from kilometres to meters

What does the law of universal gravitation state?

Estimate the smallest possible period of a satellite in a circular orbit around earth. (mass and radius of earth is 5.98 x 1024 kg and 6.37 x 106 m. the universal gravitational constant g = 6.67 x 10-11 n. m2/kg2.)

What happens along a stationary front? a. Cold air rises over warm air. b. The flow of air is neither toward the warm air mass nor toward the cold air mass. c. Air moves so rapidly upward that hurricanes form. d. Wind stops completely.

Which of the following is a vector quantity (a) mass (b) speed (c) time (d) acceleration