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2 years ago

Which part of the curve shows:

Physics

2 answers:

Scorpion4ik [409]2 years ago

7 0

Answer:

O - A : acceleration

A - B : zero acceleration

B - C : deceleration

C - S : zero velocity

Explanation:

acceleration is velocity over time, meaning that the slope of the graph is showing acceleration

AVprozaik [17]2 years ago

5 0

Answer / Explanation:

acceleration is essentially increasing in velocity. [acceleration is literally velocity over time]

So, we can see acceleration on this velocity/time graph (the y-axis is representative of velocity).

Meaning that...

When we increase in velocity, that is acceleration. [A]

When we stay at the same velocity, that is zero acceleration. [B]

<em>> (we are not increasing {acceleration} or decreasing {deceleration} in velocity/ acceleration over time)</em>

When we decrease in velocity, that is deceleration. [C]

When we have <em>no</em> velocity (velocity = 0), that is zero velocity. [D]

So, this curve is already in order of A-B-C-D.

(origin/0 to A = acceleration)

(A to B = zero acceleration)

(B to C = deceleration)

(C to S = zero velocity)

hope this helps!!

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A convex lens with a focal length of 10 cm is located 30 cm away from a

zloy xaker [14]

Answer: 15 cm

Explanation:

According to the Lens Equation we have the following:

$\frac{1}{f}=\frac{1}{v}+\frac{1}{u}$ (1)

Where:

$f=10 cm$ is the focal length

$u=30 cm$ is the distance between the candle (the object) and the lens

$v$ is the distance between the image and the lens

Isolating $v$ :

$v=\frac{uf}{u-f}}$ (2)

Solving:

$v=\frac{(30 cm)(10 cm)}{30 cm-10 cm}}$ (3)

Finally:

$v=15 cm$ This is where the image is located

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3 years ago

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Aloiza [94]

The answer is A. Photosynthesis
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3 years ago

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Sauron [17]

Answer:

An electron has a negative electric charge.

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4 years ago

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Consider a 20 cm thick granite wall with a thermal conductivity of 2.79 W/m·K. The temperature of the left surface is held const

kozerog [31]

Answer:

The right wall surface temperature and heat flux through the wall is 35.5°C and 202.3W/m²

Explanation:

Thickness of the wall is L= 20cm = 0.2m

Thermal conductivity of the wall is K = 2.79 W/m·K

Temperature at the left side surface is T₁ = 50°C

Temperature of the air is T = 22°C

Convection heat transfer coefficient is h = 15 W/m2·K

Heat conduction process through wall is equal to the heat convection process so

$Q_{conduction} = Q_{convection}$

Expression for the heat conduction process is

$Q_{conduction} = \frac{K(T_1 - T)}{L}$

Expression for the heat convection process is

$Q_{convection} = h(T_2 - T)$

Substitute the expressions of conduction and convection in equation above

$Q_{conduction} = Q_{convection}$

$\frac{K(T_1 - T_2)}{L} = h(T_2 - T)$

Substitute the values in above equation

$\frac{2.79(50- T_2)}{0.2} = 15(T_2 - 22)\\\\T_2 = 35.5^\circC$

Now heat flux through the wall can be calculated as

$q_{flux} = Q_{conduction} \\\\q_{flux} = \frac{K(T_1 - T_2)}{L}\\\\q_{flux} = \frac{2.79(50 - 35.5)}{0.2}\\\\q_{flux} = 202.3W/m^2$

Thus, the right wall surface temperature and heat flux through the wall is 35.5°C and 202.3W/m²

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3 years ago

Which statement correctly describes the classification of chemical reactions into different categories?(1 point) Not all reactio

VMariaS [17]

Answer:

its a

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