How to understand physics

Action and reaction forces will cancel because they are pushing on the same object toward each other. True or False

A car travels past a sign at 8:52 pm it travels at a constant speed 1,000 meters down the road and gets to another stop sign at 8:57 pm. What was the car's speed between the signs?

Who was the first person to prove the curvature of the earth?

Calculate the efficiency of a fossil-fuel power plant that consumes 380 metric tons of coal each hour to produce useful work at the rate of 720 MW. The heat of combustion of coal (the heat due to burning it) is 28 MJ/kg.

Which type of power station has the fastest start up time? Coal, natural gas, nuclear or oil?

A 6 kg table has a net force of 15 N acting on it. What is the magnitude of the acceleration of the table?

What would a drummer do to make the sound of the drum give a note of lower pitch?

Um atleta correu 400 metros em 80 segundos. Qual é sua velocidade média?

An object at free fall near the Earth's surface experiences constant velocity. True or false?

Ian walks 2km to his best friends house, the. Walks. 5km to the library. Then makes a 2.5 km walk home. The entire walk took 3 hours. What is his average speed in km/h?