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Akimi4 [234]
4 years ago
14

how could you measure the amount of elastic potential energy in a streched rubber band? think about the definition of energy whe

n planning your investigation
Physics
1 answer:
irina1246 [14]4 years ago
6 0
<h2>The elastic potential energy gained by the rubber band is the work done by you in elongating it. Positive work is done on the rubber band, so it gains energy. While work is done by you (i.e. negative work is done on you), so you lose some energy. The total energy is conserved. </h2><h2> </h2><h2>In simple words, the energy gained by the rubber band is the energy lost by you while elongating it.</h2>
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Which compares the thermal energy found in a piece of coal with the thermal energy found in a newly opened coal mine?
9966 [12]

<span>The thermal energy found in a piece of coal is lesser than in the thermal energy in a newly opened coal mine. The newly opened coal mine requires a greater thermal energy to really open it due to its solid structure. Whereas in a piece of coal, it only requires a lesser amount of thermal energy to extract it.</span>

4 0
4 years ago
if you throw a rock straight up at a speed of 19m/s. How long goes it take the ball to reach its maximum height?
Scrat [10]

Answer:

It requires <u>1.9 seconds</u> to reach maximum height.

Explanation:

As per given question,  

Initial velocity (U) =19 m/s

Final velocity (V) = 0 m/s

\text { Taking acceleration due to gravity }(a)=10 \mathrm{m} / \mathrm{s}^{2}

Maximum height = S

Time taken is "t"

<u>Calculating time taken to reach maximum height:</u>

We know that time taken to reach the maximum height is calculated by using the formula V = U + at

Substitute the given values in the above equation.

Final velocity is “0” as there is no velocity at the maximum height.

0=19+10 \times t

-19=10 \times t

\frac{-19}{10}=t

t = 1.9 seconds.

The time taken to reach maximum height is <u>1.9</u> seconds.

<u>Calculating maximum height</u>:

\text { Consider the equation } V^{2}-U^{2}=2 a S

Solving the equation we will get the value of S

0-19^{2}=2 \times(-10) \times \mathrm{S} .(-\text { is due to opposite of gravity) }

-361 = -20S

Negative sign cancel both the sides.

\mathrm{S}=\frac{361}{20}

S = 18.05 m

Maximum height is 18.05 m  .

3 0
3 years ago
What is the momentum of a 121.1-kg fullback running at a velocity of 3.091 m/s?
Anarel [89]

Using the formula p=mv for momentum your answer would come out to be: p=374.32 kgm/s

p=121.1*3.091

3 0
3 years ago
which of the following are true for gravity? check all that apply. a. gravity is the force that holds objects on the surface of
Pani-rosa [81]
I believe answer the only correct answer is A. Only from thinking of how gravity works with the natural world around us. Plus answer d doesnt makes sense, and c is false. And lastly if you throw a bowling ball and soccer ball over a bridge at the same time, they will fall at the same rate, only thing that would delay them is if one had more air resistance than the other.
8 0
3 years ago
Read 2 more answers
The Voyager I spacecraft has traveled farther than any other man-made object, and in August 2012 it entered into interstellar sp
Margarita [4]

Answer:

17 h

Explanation:

The command sent to the Voyager I is a radio wave signal, which travels at the speed of light:

c=3.0\cdot 10^8 m/s

The distance between the Voyager I and the Earth is

d=1.8\cdot 10^{13} m

So, the time taken for the signal to reach the probe is

t=\frac{d}{c}=\frac{1.8\cdot 10^{13} m}{3\cdot 10^8 m/s}=60,000 s

Consindering that the number of seconds in 1 hour is

60\cdot 60 = 3600 s

Then the time elapsed converted into seconds is

t=\frac{60000 s}{3600 s}=16.7 h \sim 17 h

3 0
3 years ago
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