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3 years ago

10

A model airplane moves twice as fast as another identical model airplane. compared with the kinetic energy of the slower airplan

e, the kinetic energy of the faster airplane is

1 answer:

Papessa [141]3 years ago

6 0

Twice as fast, so multiply the kinetic energy of the slower plane by two.

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The energy equivalent of the rest mass of an electron is

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Answer:energy times mass

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3 years ago

Let’s calculate Ms Jackson’s acceleration as she comes to a stop. Remember that the formula for acceleration is the change in ve

Natali [406]

Answer:

$-1.5 m/s^2$

Explanation:

The acceleration of an object is equal to the change in velocity of the object divided by the time taken for the object to change the velocity:

$a=\frac{v-u}{t}$

where:

u is the initial velocity

v is the final velocity

t is the time taken for the velocity to change from u to v

For Ms Jackson in this problem, we have:

u = 6 m/s (initial velocity)

v = 0 m/s (final velocity)

t = 4 s (time elapsed)

Substituting into the equation, we find the acceleration:

$a=\frac{0-6}{4}=-1.5 m/s^2$

And the negative sign indicates that the direction of the acceleration is opposite to the direction of motion.

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3 years ago

There has been a lot of attention given to Jupiter’s moon Europa as a possible site where life might be found. What do you think

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Therefore, with this data, we can see that technologically advanced telescopes are potent optical instruments that can be used to observe the presence of different compounds including water on the surface of a planet or its satellites such as in the case of Europe which is a satellite of Jupiter.

Learn more about the Webb telescope here:

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1 year ago

How would the number 56,780,000,000 be written in scientific notation?

kipiarov [429]

5.678 * 10^10 is the answer

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4 years ago

If a spring is stretched 4m from its starting length when 20n of force is applied, then how much work (in joules) is done by the

lys-0071 [83]

ANSWER:

250 J

STEP-BY-STEP EXPLANATION:

F = 20N is required to stretch the spring by 4 meters

We know that the force is equal to:

$F=k\cdot x$

We solve for k (spring constant):

$k=\frac{F}{x}=\frac{20}{4}=5\text{ N/m}$

The work done in stretching the spring is given by the following equation (in this case the stretch is 10 meters:

$\begin{gathered} W=\frac{1}{2}k\cdot x^2 \\ \text{ Replacing} \\ W=\frac{1}{2}\cdot5\cdot10^2 \\ W=250\text{ J} \end{gathered}$

The work required is 250 joules.

5 0

2 years ago