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The Earth is 4.543 billion years old
and we find out by scientific techniques of radiometric dating
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By dating the rocks in the ever-changing crust, as well as neighbors such as the moon and visiting meteorites, scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years.
Answer:
A watershed is land that contributes water to a stream, river, lake, pond, wetland or other body of water
A watershed often contributes water to lakes or streams.
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B.They can change the distance over which you apply a force.
C.They can change the direction in which you apply a force.
D.They can change the amount of force you exert.
this is science
The correct answer is B. They can change the distance over which you apply a force.
The incorrect statement about simple machines is A. They can change the amount of work done on an object. Simple machines do not change the total amount of work; instead, they offer a mechanical advantage by changing the force and distance relationship.
The statement that is not true of simple machines is:
A. They can change the amount of work done on an object.
Simple machines are designed to make work easier by changing the force and distance relationship. However, they do not change the amount of work done on an object because the product of the force applied and the distance over which it is applied (work) remains constant, according to the law of conservation of energy. A simple machine can change the direction of the force, change the amount of force exerted, and change the distance over which the force is applied, which are the benefits of its mechanical advantage.
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A cross between two white-coated cats would result in
A.
white-coated kittens or brown-coated kittens.
B.
white-coated kittens with brown spots.
C.
white-coated kittens only.
D.
brown-coated kittens only.
A cross between two white-coated cats would result in white-coated kittens only. Thus, the correct option for this question is C.
Inheritance may be defined as a process through which characters are transferred from one generation to the next generation. It is also known as heredity. It builds the base for genetics and genetic cross.
According to the context of this question, the allele for a brown coat (B) is dominant to the allele for a white coat (b), i.e. B > b. Now, if a white coat (bb) is crossed with a white coat (bb), it never produces a brown-coat kitten. It is because B is required in order to express dominant traits in progenies.
Therefore, a cross between two white-coated cats would result in white-coated kittens only. Thus, the correct option for this question is C.
To learn more about Inheritance, refer to the link:
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Explanation:
motion means displacement or change in the position of an object over time. It can be described in terms of displacement, distance, velocity etc. ... eg pushing a block is an example of linear motion, opening a door is an example of rotation, rotating stone with attached thread is an example of a circular motion.