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2 years ago

9

What kind of simple machine is a shovel

2 answers:

Minchanka [31]2 years ago

8 0

I think a shovel is a wedge simple machine.

Aneli [31]2 years ago

5 0

It is a tool for digging, lifting and moving bulk materials such as: snow, sand, gravel, etc.

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Explain how to produce a longitudinal wave on a spring that has large energy. There are two answers; one involves wavelength and

melamori03 [73]

Compressions are regions of high pressure due to particles being close together
rarefactions are regions of low pressure due to particles being spread further apart
Longitudinal waves are often demonstrated by pushing and pulling a stretched slinky spring

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2 years ago

Water acts as a solvent.<br> a. True<br> b. False

Talja [164]

True. Water acts as a solvent as the solute dissolves into water.

7 0

2 years ago

A bond between a nonmetal and a nonmetal is called a(n)

Pani-rosa [81]

Answer:

answer: B

Explanation:

becaucse it is B

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2 years ago

Read 2 more answers

The true absorbance for a 1.0 x 10 −5 M solution is 0.7526. If the percentage stray light for a spectrophotometer is 0.56%, calc

Korvikt [17]

Answer:

The percentage deviation is $\Delta M = 1.87$ %

Explanation:

From the question we are told that

The concentration is of the solution is $C = 1.0*10^{-5} M$

The true absorbance A = 0.7526

The percentage of transmittance due to stray light $z = 0.56$ % $=\frac{0.56}{100} = 0.0056$

Generally Absorbance is mathematically represented as

$A = -log T$

Where T is the percentage of true transmittance

Substituting value

$0.7526 = - log T$

$T = 10^{-0.7526}$

$= 0.177$

$= 17.7$ %

The Apparent absorbance is mathematically represented

$A_p = -log (T +z)$

Substituting values

$A_p = -log(0.177 + 0.0056)$

$= -log(0.1826)$

= 0.7385

The percentage by which apparent absorbance deviates from known absorbance is mathematically evaluated as

$\Delta A = \frac{A -A_p}{A} * \frac{100}{1}$

$= \frac{0.7526 - 0.7385}{0.7526} * \frac{100}{1}$

$\Delta A = 1.87$ %

Since Absorbance varies directly with concentration the percentage deviation of the apparent concentration from know concentration is

$\Delta M = 1.87$ %

6 0

2 years ago

What is used to measure the distance of nearby stars??

Allisa [31]

Light years? if you are talking about the distance to the star.

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2 years ago