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3 years ago

What is the acceleration of the the object during the first 4 seconds?

Physics

1 answer:

AVprozaik [17]3 years ago

6 0

Answer:

Velocity (m/s) over time (s) graph

We could write out our average acceleration as:

a = Δv/ Δta=Δv/Δta, equals, Δ, v, slash, Δ, t

a = (15 m/s - 0 m/s) / 0.2 seconds

a = 15 m/s / 0.2 seconds

a = 75 m/s / second

Explanation:

What this formula is telling us is that if we know the acceleration of an object, and the ... we can plug in our acceleration of 12.5 m/s2 for a, and 4 seconds for t.

Velocity (m/s) over time (s) graph

We could write out our average acceleration as:

a = Δv/ Δta=Δv/Δta, equals, Δ, v, slash, Δ, t

a = (15 m/s - 0 m/s) / 0.2 seconds

a = 15 m/s / 0.2 seconds

a = 75 m/s / second

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A light ray passing from medium 1 to medium 2 is bent away from the perpendicular normal to the boundary surface. What happens t

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Answer:

The answer is a for Plato users.

Explanation:

Since the angle of the refracted ray moves away from the normal, it must be traveling in a faster medium.

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3 years ago

Read 2 more answers

Which type of acceleration would be best if you were merging onto the interstate?

kondaur [170]

Answer:

If merging onto an interstate, it is best to merge at the speed of the moving traffic.

Explanation:

As a driver, you cannot always count on the other drivers to see you wanting to merge onto the interstate, and even if they see you, they might not be willing to stop just so you merge, therefore it is best advised to look for a gap in the traffic and merge at the traffic speed.

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3 years ago

A 2.0 m length of wire is made by welding the end of a 120 cm long silver wire to the end of an 80 cm long copper wire. Each pie

Levart [38]

Explanation:

Resistivity of silver wire = $1.47 e-8 ohm meter$

Resistivity of copper wire = $1.72 \mathrm{e}-8 \text { ohm meter }$

Resistance = Resistivity *length/cross sectional area

$R=\rho_{L / A}$

So,

$\begin{aligned}&I=A\left(V / P_{A g} L_{A g}+P_{C u} L C_{U}\right)\\&1=8104 \mathrm{A}\end{aligned}$

For E calculation

For copper

E = resistivity * current density

E = Resistivity * current/area

$E=4.9298 \mathrm{V} / \mathrm{m}$

For silver

$E=4.213 \mathrm{V} / \mathrm{m}$

Potential difference $=E^{*} L$

For silver

Potential difference = $4.213^{*} 1.2=5.055 \mathrm{V}$

For copper

Potential difference = $3.9438 \mathrm{V}$

7 0

2 years ago

Dara ran on a treadmill that had a readout indicating the time remaining in her exercise session. When the readout indicated 24

Anastasy [175]

Answer:

97 minutes and 12 seconds

Explanation:

Let x be the total time

From the first statement

$\frac{10}{100}x=24\times 60+18\\\Rightarrow 0.1x=1458\\\Rightarrow x=\frac{1458}{0.1}\\\Rightarrow x=14580\ seconds$

Total time of Dara's exercise is 14580 seconds

40 %

$\frac{40}{100}\times 14580=5832\ seconds$

$\frac{5830}{60}=97.2\ minutes=97+0.2\times 60\\ =97\ minutes\ and\ 12\ seconds=1\ hour\ 37\ minutes\ and\ 12\ seconds$

Time when she had completed 40% was 1 hour 37 minutes and 12 seconds

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3 years ago

The aluminum alloy (2024-t6) absorber plate is 6 mm thick and well insulated on its bottom. the top surface of the plate is sepa

Xelga [282]

The aluminum alloy(2024-T6; k=180 W/m!K,) absorber plate is 6 mm thick and well insulated on its bottom. The top surface of the plate is separated from a transparent cover plate by an evacuated space. The tubes arespaced a distance L of ...

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3 years ago