The chemical name for laughing gas is dinitrogen oxide. The two elements found in a sample of this gas are

You spot a plane that is 1.37 km north, 2.71 km east, and at an altitude 4.65 km above your position. (a) How far from you is the plane? (b) At what angle from due north (in the horizontal plane) are you looking?

A boy pushes a toy car with the force of 50N. The force of friction as the car moves is 5N. What is the net force on the car

On the Celsius scale what temperature does water boil

How are scientific methods used to answer a question?

A wave has a frequency of 440 hz and a wavelength of 0.77m. What is the velocity of the wave

Steam moves into a cylinder of a steam engine at a constant pressure and does 2.34 J of work on a piston. The diameter of the piston is 3.4 cm and the piston travels 4.6cm. What is the pressure of the steam?

Identify each type of simple machine.

A car's speedometer reads 20 m/s after accelerating, from a standing start, for 25s. What was the magnitude of its acceleration?

What happens to the period of a pendulum and the period of a spring as the amplitude of the oscillation increases? Briefly give an explanation for this relationship.

The element that is most abundant in earth is