Example of weathering and erosion:
- The ocean beating up against the cliff of a wall and slowly wearing away rock
- A river flowing through river banks and the bank slowly stretching apart further and further as time goes on
- Water freezes in a crack on a rock. As the water freezes, the crack expands on the rock.
- A plant is planted in the same spot every year and slowly breaks up the soil.
- Acid rain slowly breaks down the structure of a building.
Chemical properties are observed when matter or substance changes to form a new kind of matter or substance.
<h3>What is Chemical properties?</h3>
This is the term used to describe the ability of a substance or matter to react and form new substance. Chemical properties are used during chemical reaction to be able to control the reaction and get a certain product
we can conclude that chemical properties are observes during chemical reaction to ascertain the new substance or matter to be formed
Read more on chemical properties here: brainly.com/question/17436856
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Answer:
(a). The weight of spacecraft at height 6450 km is .
(b). The weight of spacecraft at height 33700 km is 182.46 N.
Explanation:
Given that,
Radius of earth = 6450 km
Weight of spacecraft = 7070 N
We need to calculate the weight of the spacecraft at a height 6450 km above Earth’s surface
Using formula of weight
Where, W = weight of spacecraft
h = height
Put the value into the formula
(b). We need to calculate the weight of spacecraft at height 33700 km
Using formula of weight
Hence, (a). The weight of spacecraft at height 6450 km is .
(b). The weight of spacecraft at height 33700 km is 182.46 N.
Roemer used the diameter of the earth's orbit in his calculation of the speed of light.