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wlad13 [49]
3 years ago
12

Is it possible to have a negative change in energy? Explain.

Physics
1 answer:
xxMikexx [17]3 years ago
6 0
Yes because if energy could have a positive change why can you not have a negative change
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What city was destroyed by an earthquake in 1923?
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I know that Tokyo commonly has several earthquakes, due to the fact that it lies on top of a fault line and that Tokyo has several tsunamis, like they did a few years ago. Several thousand were killed and went missing.
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Which of the following equations are balanced correctly?
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Answer:

It looks like A is the correct answer.

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4 years ago
A 34,000-lb airplane lands on an aircraft carrier and is caught by an arresting cable. The cable is inextensible and is paid out
Firlakuza [10]

Answer:

  F = 153637 lb

Explanation:

Let's use the kinematic equations to find the airplane's braking speed

       v² = v₀² + 2 a d

The final speed is zero

       a = - v₀² / 2d

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       v₀ = 110 mi / h (5280 ft / 1 mile) (1 h / 360 s) = 161.33 ft / s

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6 0
4 years ago
Use the equation d=m/v. If a rock has a density of 2g/cm^3 and a volume of 8cm^3, what is the mass?
Ray Of Light [21]

Answer:

The mass is 16 [g]

Explanation:

We have to remember the formula that defines density, which mentions that the density is equal to mass divided by the volume.

Density = mass / volume\\where:\\density = 2[\frac{g}{cm^{3} } ]\\Volume = 8 [cm^{3}]

Now we clear the mass:

mass= density*volume\\mass = 2[\frac{g}{cm^{3} }]*8[cm^{3} ]\\mass = 16 [g]

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