Planet with a density so low that it could float on water

A farm tractor tows a 4080 kg trailer up a 14.5° incline at a steady speed of 3.0 m/s. what force does the tractor exert on the trailer? (ignore friction.)

The forces that hold different atoms or ions together are

Radioactive isotopes Select one: a. have an excess number of electrons. b. behave the same chemically, physically, and biologically as other isotopes. c. have an excess number of neutrons. d. are produced when substances are exposed to radiation. e.

Laura thinks that the oak tree has the largest leaves of all the trees at the playground. How could she best test her prediction? A. Measure the height of each of the trees at the playground. B.

A car travelling with 20 m/s, comes to halt after travelling 18 m. Find the time taken by the car to stop.

What evidence is there of life in a mini habitat?

A hole is drilled to the center of the earth and a ball is dropped into it. When the ball is at the earth's center, compared with their respective values at the earth's surface,

What is the development of static?

Methane gas absorbs red light, and methane clouds reflect blue light, giving Uranus and Neptune their distinctive blue colors. Why do Uranus and Neptune have methane clouds, but Jupiter and Saturn do not

A brick is released with no initial speed from the roof of a building and strikes the ground in 2.50 s, encountering no appreciable air drag.