2 years ago

In a chemical reaction, the mass of the reactants is 13,3 grams. Which of the

Physics

1 answer:

Pachacha [2.7K]2 years ago

7 0

Answer:

my assuytyyhyyyyyy gftdrrdtiifyb tvhyvth rv b yy

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sofa

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because the sofa is heavy and the amount of friction is high due to the amount of opposite friction is pushing it back

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3 years ago

A projectile is launched horizontally at a speed of 45.0 m/s from a

Free_Kalibri [48]

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answer will be c: 1.5 seconds :)

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2 years ago

A crane lifts a 400 N crate full of baked beans 15 m. How much work was done by the crane?

damaskus [11]

Answer:

6000 J

Explanation:

work = F x S

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3 years ago

Please Help! 30 points! ASAP PLZ :)

Savatey [412]

The best logical answer is A

5 0

3 years ago

Read 2 more answers

Cho lực F ⃗=6x^3 i ⃗-4yj ⃗ tác dụng lên vật làm vật chuyển động từ A(-2,5) đến B(4,7). Vậy công của lực là:

Natasha2012 [34]

The work done by $\vec F$ along the given path C from A to B is given by the line integral,

$\displaystyle \int_C \mathbf F\cdot\mathrm d\mathbf r$

I assume the path itself is a line segment, which can be parameterized by

$\vec r(t) = (1-t)(-2\,\vec\imath + 5\,\vec\jmath) + t(4\,\vec\imath+7\,\vec\jmath) \\\\ \vec r(t) = (6t-2)\,\vec\imath+(2t+5)\,\vec\jmath \\\\ \vec r(t) = x(t)\,\vec\imath + y(t)\,\vec\jmath$

with 0 ≤ t ≤ 1. Then the work performed by F along C is

$\displaystyle \int_0^1 \left(6x(t)^3\,\vec\imath-4y(t)\,\vec\jmath\right)\cdot\frac{\mathrm d}{\mathrm dt}\left[x(t)\,\vec\imath + y(t)\,\vec\jmath\right]\,\mathrm dt \\\\ = \int_0^1 (288(3t-1)^3-8(2t+5)) \,\mathrm dt = \boxed{312}$

7 0

2 years ago