What type of substance is always made up of a single type of atom?

Two forces (4N and 3N) pull your the left, while a 12N force pulls to the right. What is the net force

True or false the Richter scale describes the effects of an earthquake on people, buildings, and land at a given location.

Find the average velocity if the takeoff velocity of an airplane on a runway is 300 km/hr with an acceleration of 1 m/s2. A) 30 sec B) 41.7 sec C) 72.2 sec D) 83.33 sec

A 275-kilogram object starts from rest and accelerates on level ground up to a speed of 41 meters per second over 49.3 meters. It continues at that speed for another 15 meters.

Which of the following wavelength regimes are primarily observed using Space based telescopes rather than Earth based telescope? A. Radio B. Infrared C. Visible D. Ultra violet E. X ray F. Gamma ray

What is a sedimentary rock consisting of material that was precipitated from water

The path of a beam of light from the sun to your eye when you are wearing sunglasses

The element that is most abundant in earth is

What is true about coal as an energy source

A car is moving with a speed of 22 m/s. The driver then brakes, and the car comes to a halt after 6.5 s. What is the distance covered by the car after the driver brakes, until it comes to a stop? A) 36 m B) 72 m C) 140 m D) 210 m