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2 years ago

Hi I need help with the question in the image, step by step. ASAP!, thank you.

Physics

1 answer:

sergeinik [125]2 years ago

7 0

The heating curve is a representation of temperature change for a body with time as shown on cartesian axes.

<h3>What is a heating curve?</h3>

The heating curve is a representation of temperature change for a body with time as shown on cartesian axes.

The point A represents the steady increase in the temperature of the solid. The point B shows the point of fusion, at this point, the solid is transformed into liquid. The point C shows the temperature rise with time as the liquid is heated. The point D shows the process of vaporization which converts the liquid to gas. The point E shows when the substance now exists in the gas phase.

Learn kore about heating curve:brainly.com/question/10481356

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A cowboy fires a silver bullet with a muzzle speed of 200 m/s into the pine wall of a saloon. Assume all the internal energy gen

tigry1 [53]

Explanation:

KE = q

½ mv² = mCΔT

ΔT = v² / (2C)

ΔT = (200 m/s)² / (2 × 236 J/kg/°C)

ΔT = 84.7°C

8 0

3 years ago

Two diamonds begin a free fall from rest from the same height 0.9 s apart. How long after the first object begins to fall will t

Kay [80]

<h2>The time taken is 1 second </h2>

Explanation:

Suppose the first diamond falls for t seconds

The downward displacement S₁ = u t + $\frac{1}{2}$ g t²

here u = 0 , because it was at rest initially

Thus S₁ = $\frac{1}{2}$ g t² I

Similarly second diamond moves for time ( t - 0.9 ) sec

The distance covered by it is

S₂ = $\frac{1}{2}$ g (t - 0.9 )²

The separation between the two is 13 m

Thus S₁ - S₂ = 13 m

$\frac{1}{2}$ g t² - $\frac{1}{2}$ g t² + 0.9 g t - 0.4 g = 13

or 9 t = 13 - 4 = 9

Hence t = 1 sec

8 0

3 years ago

While running a 100m race, a runner runs from the 20m to 30m mark in 77 frames of a video record. If the video camera recorded d

Marrrta [24]

Answer:

Speed of the runner during video interval is 6.49 m/s

Explanation:

According to the problem,

Number of frames recorded by camera in 1 second = 50

Time takes by camera to record 1 frame = (1/50) s

Time taken by camera to record 77 frames, t = $\frac{1}{50}\times 77$ s

Distance covered by the runner during the video recording, d = 10 m

Speed, v = $\frac{Distance}{time}=\frac{d}{t}$

Substitute the values of d and t in the above equation.

v = $\frac{10}{\frac{77}{50} }$

v = 6.49 m/s

3 0

4 years ago

A rod made up of certaon metall which had coefficiebt of volume expansion is 33×10^-6 per celsius degrer.The rod is 100 meter lo

Irina-Kira [14]

Answer:

100.11 m

Explanation:

Given:

Coefficient of volume expansion, $\alpha_{v}=33\times10^{-6}$ /°C.

Initial length of rod, $l=100 m$

Change in temperature, ΔT= $(90-(-10))=100$ °C

We know that,

$\alpha_{v}=3\alpha_{L}\\\alpha_{L}=\frac{\alpha_{v}}{3}\\\alpha_{L}=\frac{33\times10^{-6}}{3}=11\times10^{-6}$ /°C

Here, $\alpha_{L}$ is the coefficient of linear expansion.

Now, we know that,

Change in length (Δl) is given as,

$\Delta l=\alpha_L\times L\times\Delta T$

Plug in all the values and solve for $l$ .

This gives,

$\Delta l=11\times10^{-6}\times 100\times100\\\Delta l=0.11 \textrm{ m}$

Therefore, the length of rod after expansion is $L+\Delta l=100+0.11=100.11$ m.

4 0

3 years ago

¿Qué entiendes por un fenómeno eléctrico?

Inessa05 [86]

Answer:

English

Electrical phenomena are commonplace and unusual events that can be observed and that illuminate the principles of the physics of electricity and are explained by them. Electrical phenomena are a somewhat arbitrary division of electromagnetic phenomena

Los fenómenos eléctricos son eventos comunes e inusuales que se pueden observar y que iluminan los principios de la física de la electricidad y son explicados por ellos. Los fenómenos eléctricos son una división algo arbitraria de los fenómenos electromagnéticos.

6 0

3 years ago