How much can humans differentiate temperature?

The distance between earth and mars is 51 G meters. What is the minimum RTT for a link between Earth and Mars if speed of light is 3 * 108 meters/second.

What is the most important use of an element's atomic number?

What is an example of a chemical change that occurs as part of the rock cycle A) lava cools and condenses on the Earths surface B) sedimentary rocks are worn away by water erosion C) igneous rocks are cracked and broken into smaller pieces by

A wool cloth becomes positively charged as it A) loses electrons B) gains protons C) loses protons D) gains electrons

a family backpacking at Yosemite national park took 5 hours to climb a mountain trail 7.5 km long. what was the family's average speed

While floating in space a 100.-kg robot throws a 0.800-kg wrench at 12.0 m/s toward its human partner working on the spaceship. How fast will the robot recoil?

What is the order of magnitude of the speed of light

A car is going 60.0 mi/h and has to stop in 6.0 seconds. What is the car's acceleration?

Stable system where forces cancel eachother out

A 1000-kg car is traveling north at 20.0 m/s. A 1500-kg car is traveling north at 36.0 m/s. The 1500-kg collides with the rear of the 1000 - kg car and they lock together.