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JulijaS [17]
3 years ago
12

Chris is about to do an experiment to measure the density of water at several temperatures. His teacher has him prepare and sign

a safety contract before beginning the experiment.
Which item is most likely part of the safety contract?

A. Understand how to deal with water safely in the lab.
A. Bring an electronic copy of the MSDS on a personal laptop.
A. Do not discuss the experiment with other students in the lab.
A. Inspect the glassware for cracks or chips prior to beginning the lab.
Physics
2 answers:
Marina86 [1]3 years ago
7 0
Inspect the glassware for cracks or chips prior to beginning the lab.
swat323 years ago
5 0

the answer is D have a nice day.

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An organ pipe open at both ends has two successive harmonics with frequencies of 220 Hz and 240 Hz. What is the length of the pi
Harman [31]

Answer:

The  length is  l  =  8.6 \  m

Explanation:

From the question we are told that

   The frequencies of the two successive harmonics are f_1 =  220 \ Hz ,  f_2  =  240 \  Hz

   The speed of sound in the air is  v_s  =  343 \  m/s

Generally the frequency of a given harmonic is mathematically represented as

     f_n  =  \frac{n  v  }{2l}

Here  n defines  the position of the harmonics

Now since the position of both harmonic is not know but we know that they successive then we can represented them mathematically as

    220  =  \frac{n v}{2l}

and  

     240  =  \frac{(n+1) v}{2l}

So

   \frac{(n + 1 ) v}{2l} - \frac{n v}{2l}  =  240-220

=>  \frac{v}{2l}  =  20

=>   l  =  8.6 \  m

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3 years ago
What is the main reason for using a data table for collecting data?
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Answer:

to make calculation more easy to get

Explanation:

if you are using chart or calculate Thermodynamic problems you will not never solve this problem with out using data table for thermodynamic

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3 years ago
When dissolved into water, a molecule of potassium chloride ___________.
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Explanation:

4 0
2 years ago
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How to do this question
Anna71 [15]

Answer:

(a) 10 m/s

(b) 22.4 m/s

Explanation:

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g = v²/r

v = √(gr)

v = √(10 m/s² × 10.0 m)

v = 10 m/s

(b) Energy is conserved.

Initial kinetic energy + initial potential energy = final kinetic energy

½ mv₀² + mgh = ½ mv²

v₀² + 2gh = v²

(10 m/s)² + 2 (10 m/s²) (20.0 m) = v²

v = 22.4 m/s

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3 years ago
object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object and the image is​
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Answer:

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