The Cenozoic Era is best described as the era in which

A perfectly elastic collision is a collision: Between two springs. That conserves thermal energy. That conserves kinetic energy. That conserves potential energy. That conserves mechanical energy.

Air escapes from a balloon at a rate of 2 60 () 1 R t t   3 ft / min, where t is measured in minutes. How much air (in 3 ft) escapes during the first minute?

Which of the following states that absolute zero cannot be reached A. the first law of thermodynamics B. the second law of thermodynamics C. the third law of thermodynamics D. the second and third laws of thermodynamics

How would you describe the magnetic field produced by a current in a straight wire? A. the lines of force run parallel to the wire B. the lines of force run perpendicular to the wire C. the lines of force run circles around the wire

How does the surface of a material affect the color of a material

How the properties of sound waves change as they spread out in a spherical pattern

If legos are plastic can they be recycled?

At an accident scene on a level road, investigators measure a car's skid mark to be 93 m long. It was a rainy day and the coefficient of friction was estimated to be 0.35.

How does a shorter wavelength affect the frequency of a wave?

Which property of a filled balloon would be unchanged on the moon where there's no air and less gravity? A. mass B. weight C. volume D. density