Which of the following is the best definition of vectors

it takes 29.5 minutes to walk with an average velocity of 1.2 m/s to the north from the bus stop to the museum entrance what is your displacement

In which part of the atmosphere does temperature decrease with increasing height?

Which of the following changes igneous or sedimentary rock into metamorphic rock? A. heat and pressure B. heat and weathering C. water and weathering D. water and pressure

Describe the energy change in the particles of a substance during melting. A) The kinetic energy of the particles remains unchanged. B) Absorbed energy results in the change in potential energy.

In the deep space between galaxies, the density of atoms is as low as 106 atoms/m3, and the temperature is a frigid 2.7 K. What is the pressure (in Pa) ?

How many layers of material were the roads made of? a. two c. four b. three d. five

Red light has a shorter wavelength than yellow light.

Approximately what is the parallax angle of a star that is 20 light-years away?

If the Earth and distant stars were stationary (motionless) in space, what would we observe about the wavelength from these stars? A. Wavelengths measured would match the actual wavelengths emitted. B.

Two fire trucks with sirens speeds towards and away from an observer. Which statement is true involving the Doppler effect observed by the observer?