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3 years ago

Dimension of specific heat capacity

Physics

1 answer:

Luden [163]3 years ago

3 0

Answer:

The specific heat of a substance (per unit of mass) has dimension L. T. Θ−1, or (L/T)2/Θ. Therefore, the SI unit J/K/kg is equivalent to metre squared per second squared per kelvin (m2 K−1 s−2).

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The sound intensity of a certain type of food processor in normally distributed with standard deviation of 2.9 decibels. If the

Maru [420]

Answer: $(48.41,\ 52.19)$

Explanation:

The confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : $n=9$

Sample mean : $\ovreline{x}=50.3\text{ decibels}$

Standard deviation : $\sigma=2.9\text{ decibels }$

Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}=z_{0.025}=1.96$

Now, the 95% confidence interval estimate of the (true, unknown) mean sound intensity of all food processors of this type :-

$50.3\pm (1.96)\dfrac{2.9}{\sqrt{9}}\\\\\approx50.3\pm1.89\\\\=(50.3-1.89,\ 50.3+1.89)=(48.41,\ 52.19)$

6 0

3 years ago

(a) A hole of 1 cm in diameter is drilled in a plate of steel at 20°C. What happens to the diameter of the hole as the steel is

Anestetic [448]

When heat is applied to a substance/material or steel in our case, a series of changes will occur, one of which is Expansion.

Hence the hole will expand from 1cm to a diameter that is greater.

Thermal expansion refers to the expansion or contraction of the dimensions of the solid, liquid or gas when their temperature is changed.

<h3>Types of Expansion</h3>

Linear expansion
Areal expansion and
Volumetric volume.

Learn more about expansion here:

brainly.com/question/1166774

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3 years ago

Suppose that during any period of ¼ second there is one instant at which the crests or troughs of component waves are exactly in

kolezko [41]

<h3><u>Answer;</u></h3>

A. 4

<h3><u>Explanation;</u></h3>

<em><u>The period of a wave or periodic time is the time taken for a complete oscillation to occur. </u></em>For example its is the time taken between two successive crests or troughs.
<em><u>The beats or oscillation that occur in one second represents the frequency. Frequency is the number of complete oscillations or beats in one second in a wave.</u></em>
Frequency, measured in Hertz is given by the reciprocal of the periodic time.
Thus; <u><em>Frequency or beats per second = 1/(1/4) = 4</em></u>
<u><em>Hence , 4 beats per second</em></u>

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4 years ago

Calculate the amount of work done if you use a 100N force to push a 50kg box 5m across the kitchen floor.

irinina [24]

So if the formula for work is force times displacement times cosine(theta), you'd plug in the numbers

100x5 (since there's no angle in the problem, cosine(theta) isn't used

100x5 = 500

So the answer would be B.

Hope that helps!

6 0

3 years ago

Read 2 more answers

People hoping to travel to other worlds are faced with huge challenges. One of the biggest is the time required for a journey. T

Elena L [17]

Answer:

It would take 8.22037 hrs away. Wouldn't it?

Explanation:

Because

4.11016

= 8.22037

5 0

4 years ago

Dimension of specific heat capacity​

Dimension of specific heat capacity