D only..
A is pure compound
B is mixture of compound and element
C is mixture of compounds
D is mixture of elements
A spring scale is a type of weighing scale, it works because it uses a spring that is proportional to the distance that the spring is from its resting position.
It’s C. 4.68 N
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Answer:
The correct option is: Recency effect
Explanation:
Serial position effect is a concept that describes the <u>effect of the position of an item in a sequence on its recall accuracy</u>. According to this theory, in a sufficiently long list of items, an individual is more likely to recall the first and the last items with greater accuracy than the middle items.
There are two types:
<u>1. Recency effect</u>: <u>The items in the end of the list or series are recalled first and more accurately.</u>
<u>2. Primacy effect</u>: The items in the beginning of the list or series are recalled first and more accurately.
In the given example, Jaden can only recall the abbreviation for the <u>last 5 elements in a list of 30 elements</u>. This tendency is known as Recency effect.
Answer:- The speed of the satellite is 7.6
.
Solution:- It's a unit conversion problem that could be solved using dimensional analysis which is also known as train trail method.
The given speed of the satellite is 17000 miles per hour and we are asked to convert it to kilometers per second.
given:
1 Kilometer = 0.62 mile
1 hour = 3600 second
Let's use this given info and plug in the values to make the set up as:

= 7.616
We round the answer to two significant figures, since the given number(17000) has only two significant figures.
Hence, the speed of the satellite is 7.6
.