The emission spectrums are known for the elements below.

1 answer:

4 0

Answer: Hello your question is incomplete, I was able to find the question online but I am unable to attach it due to plagiarism rules

answer : Lithium and Potassium

Explanation:

The elements that are in the unknown sample are : Lithium and Potassium

An Emission spectrum is used to determine the composition of a material and it is distinctively different for each element that us found on the period table

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A speed-time graph is shown below:

alexandr1967 [171]

Answer:

<em>The average acceleration of the object is 0.5 cm/s^2</em>. Answer: A)

Explanation:

<u>Average Acceleration</u>

The average acceleration of a moving object is the rate at which the speed changed over time in a specific period. It can be calculated as follows:

$\displaystyle \bar a=\frac{v_f-v_o}{t}$

Where vf is the final speed, vo is the initial speed and t is the time.

The speed-time shows the speed starts at 0 cm/s and ends at 4 cm/s over the 8 seconds period. The average acceleration is:

$\displaystyle \bar a=\frac{4-0}{8}=0.5$

The average acceleration is 0.5 cm/s^2

A) Correct. The average acceleration is 0.5 cm/s^2

B) Incorrect. The average acceleration is 0.5 cm/s^2

C) Incorrect. The average acceleration is 0.5 cm/s^2

D) Incorrect. The average acceleration is 0.5 cm/s^2

3 0

3 years ago

PLEASE HELP ASAP.

kifflom [539]

Volume of the original block (V) of length (l), width (w) and height (h) is given by the following equation

$V = l*b*h$

hence volume of original block, V = (6)(4)(10) = $240 cm^{3}$

Now say we cut this block in two equal parts, than the length of new block will be $6/2 = 3 cm$ ; where as its width and height will be same as of original block i.e. 4 cm and 10 cm respectively.