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kap26 [50]
3 years ago
6

Calculate the displacement of a motorcycle that accelerates forward from rest to 7.0 m/s in 3.5 s.

Physics
1 answer:
Harrizon [31]3 years ago
3 0

Answer:

12.25 meters

Explanation:

s=1/2(v+u)t

s= displacement

v= final velocity

u= initial velocity

t= time

7m/s+0m/s divide by 2= 3.5 m/s velocity  Times 3.5 seconds=  12.25 meters

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The beautiful Multnomah Falls in Oregon are approximately 206m high. If the Columbia river is flowing horizontally at 2.90m/s ju
zhenek [66]

Answer:

The overall velocity of the water when it hits the bottom is:

v_f=63.61\ \frac{m}{s}

Explanation:

Use the law of conservation of energy.

Call it instant [1] to the moment when the water is just before reaching the falls.

At this moment its height h is 206 meters and its velocity  horizontally v_i is v_i = 2.90m/s.

At the instant [1] the water has gravitational power energy E_g

E_g = mgh

The water also has kinetic energy Ek.

E_k = 0.5mv_i ^ 2

Then the Total E1 energy is:

E_1 = mgh + 0.5mv_i ^ 2

In the instant [2] the water is within an instant of touching the ground. At this point it only has kinetic energy, since the height h = 0. However at time [2] the water has maximum final velocity v_f

So:

E_2 = 0.5mv_f ^ 2

As the energy is conserved then E_1 = E_2

mgh + 0.5mv_i ^ 2 = 0.5mv_f ^ 2

Now we solve for v_f.

gh + 0.5v_i ^ 2 = 0.5v_f ^ 2\\\\9.8(206) + 0.5(2.90) ^ 2 = 0.5v_f 2\\\\v_f^2 = \frac{9.8(206) + 0.5(2.90) ^ 2}{0.5}\\\\v_f = \sqrt{\frac{9.8(206) + 0.5(2.90) ^ 2}{0.5}}\\\\v_f=63.61\ \frac{m}{s}

7 0
3 years ago
Gunther needs a 75% concentrated solution. When making his solution at room temperature, he could only make a solution that was
jolli1 [7]

Answer:

Heat the solution, dissolve the solute, and let it cool verifying nothing settled out.  

Explanation:

7 0
3 years ago
Read 2 more answers
When an object is fully converted into energy the amount of energy liberated is
EleoNora [17]

Answer:

Mass, m = 4 kg

Explanation:

<u>Given the following data;</u>

Energy = 3.6 * 10^17 Joules

We know that the speed of light is equal to 3 * 10⁸ m/s.

To find the mass of the substance;

The theory of special relativity by Albert Einstein gave birth to one of the most famous equation in science.

The equation illustrates, energy equals mass multiplied by the square of the speed of light.

Mathematically, the theory of special relativity is given by the formula;

E = mc^{2}

Where;

  • E is the energy possessed by a substance.
  • m is the mass.
  • c is the speed of light.

Substituting into the formula, we have;

3.6 * 10^{17} = m * 300000000^{2}

3.6 * 10^{17} = m * 9*10^{16}

m = \frac {3.6 * 10^{17}}{9*10^{16}}

Mass, m = 4 kg

8 0
3 years ago
What quantity is represented by the slope of the graph?
Alecsey [184]
6.0 is the answer. hope this helps ya
6 0
4 years ago
Two pieces of pure copper are shown below. The two pieces must have the same ?
Gnesinka [82]
Visibly you can see that the two copper are different sizes so the mass and volume are different. No information is given about the temperature but they are side by side so you can assume they're both room temp. The density is a ratio of mass per volume. The density will remain the same unless the two are different purities or physical states.
5 0
3 years ago
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