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3 years ago

What is meant by the term ""quartz"" written on watches?

1 answer:

3 0

Answer: Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz clocks and watches are at least an order of magnitude more accurate than mechanical clocks.

Explanation:

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What circumstances are usually presented by the prosecution to bear on the issue of whether a killing was premeditated or with m

aleksklad [387]

The prosecutionusually attempts to establish either malice aforethought or premeditation by introducing avariety of evidentiary facts and sets of circumstances bearing on the defendant’s motive and state of mind; which include the defendant’s previous relationship with the victim, threats,quarrels, the defendant’s expressions of ill will towards the victim either before, at the timewounds inflicted, if there were prior attacks against the victim by the defendant, and what

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4 years ago

Explain in detail, how you solved the following problem: The first two terms of a sequence are 10 and 20. If each term after the

KIM [24]

Answer:

$T_{2020} = 15$

Explanation:

Given

$T_1 = 10$

$T_2 = 20$

Each term after the second term is the average of all of the preceding terms

Required:

Explain how to solve the 2020th term

Solve the 2020th term

Solving the 2020th term of a sequence using conventional method may be a little bit difficult but in questions like this, it's not.

The very first thing to do is to solve for the third term;

The value of the third term is the value of every other term after the second term of the sequence; So, what I'll do is that I'll assign the value of the third term to the 2020th term

This is proved as follows;

From the question, we have that "..... each term after the second term is the average of all of the preceding terms", in other words the MEAN

$T_{n} = \frac{\sum T{k}}{n-1} ; where: k = 1 .... n -1$

Assume n = 3

$T_{3} = \frac{T_1 + T_2}{2}$

Multiply both sides by 2

$2 * T_{3} = \frac{T_1 + T_2}{2} * 2$

$2T_{3} = T_1 + T_2$

Assume n = 4

$T_{4} = \frac{T_1 + T_2 + T_3}{3}$

$T_{4} = \frac{(T_1 + T_2) + T_3}{3}$

Substitute $2T_{3} = T_1 + T_2$

$T_{4} = \frac{2T_3 + T_3}{3}$

$T_{4} = \frac{3T_3}{3}$

$T_{4} = T_3$

Assume n = 5

$T_{5} = \frac{T_1 + T_2 + T_3 +T_4}{4}$

$T_{5} = \frac{(T_1 + T_2) + T_3 +(T_4)}{4}$

Substitute $2T_{3} = T_1 + T_2$ and $T_{4} = T_3$

$T_{5} = \frac{2T_3 + T_3 +T_3}{4}$

$T_{5} = \frac{4T_3}{4}$

$T_{5} = \frac{(5-1)T_3}{5-1}$

Replace 5 with n

$T_{n} = \frac{(n-1)T_3}{n-1}$

(n-1) will definitely cancel out (n-1); So, we're left with

$T_{n} = T_3$

Hence,

$T_{2020} = T_3$

Calculating $T_3$

$T_{3} = \frac{10 + 20}{2}$

$T_{3} = \frac{30}{2}$

$T_{3} = 15$

Recall that $T_{2020} = T_3$

$T_{2020} = 15$

3 0

4 years ago

What is the difference between pure breeding and true breeding

pav-90 [236]

True bred organism will have a pure genotype (genetic expression of trait ) and will only produce a certain phenotype. True bred is sometimes also called pure bred . If you take two true breeding pea planfs - say one is yellow and one that id green - and cross them, you would end up with only yellow offspring.

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3 years ago

Many people consider research papers challenging and profoundly dry. If you could write a research paper about any topic, in any

Harlamova29_29 [7]

Answer:

i would find something about how our career paths are kinda determined from childhood. Like how you are as kid has a big reflection on the career you choose.

Explanation:

5 0

3 years ago

PLS HELPPPPP

andriy [413]

Answer:

M=0.09 mol/L

Explanation:

M=mol/volume

M=0.06 mol/0.656 L(convert 656 ml to L by ÷ by 1000)

M=0.09 mol/L

3 0

3 years ago