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3 years ago

What feature of a chemical equation represents the law of conservation of matter?

2 answers:

7 0

Answer is: balanced equation.
Law of conservation of matter claims that in any system that is closed to the transfer of matter, the amount of matter in the system stays constant.
Balanced equation states that same number and type of atoms after the chemical reaction must present as before the chemical change.

Wittaler [7]3 years ago

4 0

The idea that, on each side of the equation (reactants and products), there are the same numbers of atoms of each constituent element shows that matter is conserved. There is the same mass of reactants at the beginning of an equation as there are products when the reaction completes.

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A carpenter lifts a 10-kg piece of wood to his shoulder 1.5 m above the ground. He then sets the wood on his truck at 1.0 m abov

FinnZ [79.3K]

Answer:

500Joules

Explanation:

Kinetic energy = 1/2mv²

m is the mass of the wood

v is the velocity

Given

Mass = 10kg

Velocity v = 10m/s

Substitute into the formula and get KE

KE = 1/2 * 10 * 10²

KE = 1/2 * 1000

KE = 500Joules

Hence the kinetic energy of the wood during delivery is 500Joules

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3 years ago

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The vertical force f acts downward at A on the two membered frames. Determine the magnitude of the two components of F directed

galben [10]

Answer:

The magnitude will be "353.5 N". A further solution is given below.

Explanation:

The given values is:

F = 500 N

According to the question,

In ΔABC,

⇒ $\angle BCA = (90-30)$

⇒ $=60^{\circ}$

then,

⇒ $\angle BAC=(180-45-60)$

⇒ $=75^{\circ}$

Now,

The corresponding angle will be:

⇒ $\angle FAC=60^{\circ}$

⇒ $\angle FAB=70+60$

⇒ $=135^{\circ}$

Aspect of F across the AC arm will be:

= $F\times cos(60)$

On putting the values of F, we get

= $500\times (.5)$

= $200 \ Newton$

Component F along the AC (in magnitude) will be:

= $F\times cos(135)$

= $500\times (-.707)$

= $-353.5 \ N \$

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2 years ago

What is the relationship between the horizontal and vertical components of velocity for a projectile launched at an angle betwee

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