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timurjin [86]
3 years ago
12

Collision practice

Physics
1 answer:
NikAS [45]3 years ago
6 0

Answer:

v_f=4\:\mathrm{m/s\: in\:Biff's\:direction}

Explanation:

Using the Law of Conservation of Momentum, we can set up the following equation:

m_2v_2-m_1v_1=m_fv_f, where m_1v_1 is Bruce's momentum and m_2v_2.

Plugging in given values, we get:

90\cdot7-45\cdot2=(90+45)v_f, \\v_f=\frac{540}{135}=\fbox{$4\:\mathrm{m/s}$}.

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Which of the following is not true? A) The energy of the sun comes from nuclear fusion. B) The fuel for nuclear fusion comes fr
denpristay [2]

Answer:

Option B) The fuel for nuclear fusion comes from sea water

Explanation:

Nuclear fusion can not be carried out by using any type of water as water is composed of stable water molecules (H_{2}O which is quite difficult to be decayed by any simple method.

Moreover, fusion reactions demands the combination of nuclei of lighter elements for which it makes use of the heavy isotopes of Hydrogen that are Deuterium and Tritium as fuel to carry out the nuclear fusion.

4 0
3 years ago
One object (LaTeX: m_1m1) has a mass of 2 kg and moves with a speed of 9 m/s to the right. Another object (LaTeX: m_2m2) has a m
defon

Answer:

The correct answer is B

Explanation:

The moment of an object is the product of its mass by velocity, it is described by the equation

          p = mv

In this problem they give us the most body and speeds before and after the crash. We must define an environment with both bodies so that the forces during the crash have been internalized and the moment is preserved

         Δp = pf -p₀

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         Δp = 2 9 -2 1.5

         ΔP = 14.8 m/s

The correct answer is b

7 0
3 years ago
WILL BE BRAINLIEST <br> HELP!!!
ivolga24 [154]

Answer:

(8.0÷6.0)×10[(-2)-(-3)]

6 0
3 years ago
The velocity field of a flow is given by V = 3x2ti+[4y(t-1)+3x2t] j m/s, where x and y are in meters and t is in seconds. For fl
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Answer:

See explanations

Explanation:

Given that,

Electric field E=135V/m

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The energy stored in an electric field is given as

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And E is the electric field

Then,

U=½×8.85×10^-12×135²

U=8.06×10^-8J/m³

Then, the energy stored in 1m³ of air is 8.06×10^-8 J/m³

6 0
4 years ago
According to the Theory of Continental Drift, what did the Earth’s continents look like 255 million years ago? What is the name
dmitriy555 [2]
The name of this landmas is known as <em></em>Pangaea, was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It formed approximately 300 million years ago and began to break apart after about 100 million years. 

Theres an image of how this supercontinet looked

3 0
3 years ago
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