Answer:
Explanation:
Giant impact has resulted into formation of celestial bodies such as moon.
Moon was formed years after the Earth was formed. When Earth collided with very big size bodies, there was vaporization of chunks of the planets in to the space. Gravity plays its role and bounded those particles together thus forming moon.
This formation explains Moon is made up of lighter elements and contains too little iron where as Mercury was formed with the rest of the planets and just like earth, its core is formed first which is of iron and then collected the lighter elements to form crust and mantle.
Though both Moon and Mercury were the result of giant impacts yet they have different elements because mercury was made earlier and its is closer to moon hence it collected heavy elements such as iron to for the formation where as moon is the result of collision of Earth and other Mars- sized body hence its constituent particles are different that of mercury.
Crushing pressure. Human bodies are used to air pressure. The air pressure in our lungs, ears and stomachs is the same as the air pressure outside of our bodies, which ensures that we don't get crushed. Our bodies are also flexible enough to cope when the internal and external pressures aren't exactly the same.
Answer:
the SI unir of enery is joule
(,I hope this helps yoy)
Explanation:
1.If the displacement of an object is zero,the speed must be zero.
Not true
2.(your answer is true)
3.false
4.true
In physical science, there are two types of quantities. The scalar quantity and the vector quantity. The scalar quantity has only the magnitude while the vector quantity has both the magnitude and direction. Displacement is the distance from the starting point to the end point of an object.
The distance traveled by an object can be calculated by the equation,
D = s x t
where D is the distance, s is the speed, and t is time.
Note to convert the given dimensions properly to be able to cancel units from numerator and denominator of the fraction.
D = (100 km/h)(7.5 min)(1 h/60 min) = 12.5 km
This means that the object was just back to the original point. Hence, the displacement is equal to ZERO.
