Which example illustrates a chemical change?

A sound wave has a frequency of 425 Hz. What is the period of this wave

Give two examples of work being done on a baseball

Which best compares simple machines with compound machines? Both make work easier, but compound machines consist of two or more simple machines. Both make work easier, but compound machines have less mechanical advantage than simple machines.

The mass of an electron is ... A. equal to the mass of the proton and the neutron B. not significant to the overall mass of the atom C. higher than the mass of the proton or the neutron

You arrive at an intersection with traffic lights that arent working because of a power outage. what do you do

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