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vaieri [72.5K]
2 years ago
5

9.(7 +1) Line I 9.7 +9.1 Line 2 The expression was rewritten using the Distributive Property 9. (7 + 1) equals 9. 7 which equals

63 9.7+ 9.1 equals 7 + 1 which equals 63. Submit Answer attempt 1 out of Privacy Policy Terms of Service​
Physics
1 answer:
zhenek [66]2 years ago
3 0

Answer:

Sorry

Explanation:

I really don't know what to say about this question I am not sure what to say about this

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Consider the two moving boxcars in Example 5. Car 1 has a mass of m1 = 65000 kg and a velocity of v01 = +0.80 m/s. Car 2 has a m
Amiraneli [1.4K]

Answer:

1.034m/s

Explanation:

We define the two moments to develop the problem. The first before the collision will be determined by the center of velocity mass, while the second by the momentum preservation. Our values are given by,

m_1 = 65000kg\\v_1 = 0.8m/s\\m_2 = 92000kg\\v_2 = 1.2m/s

<em>Part A)</em> We apply the center of mass for velocity in this case, the equation is given by,

V_{cm} = \frac{m_1v_1+m_2v_2}{m_1+m_2}

Substituting,

V_{cm} = \frac{(65000*0.8)+(92000*1.2)}{92000+65000}

V_{cm} = 1.034m/s

Part B)

For the Part B we need to apply conserving momentum equation, this formula is given by,

m_1v_1+m_2v_2 = (m_1+m_2)v_f

Where here v_f is the velocity after the collision.

v_f = \frac{m_1v_1+m_2v_2}{m_1+m_2}

v_f = \frac{(65000*0.8)+(92000*1.2)}{92000+65000}

v_f = 1.034m/s

8 0
3 years ago
Is electrical conductivity?
expeople1 [14]

Answer:

can't tell if this is question, it is not written correctly

Explanation:

Electrical conductivity is the measure of a material's ability to allow the transport of an electric charge. Its SI is the siemens per meter, (A2s3m−3kg−1) (named after Werner von Siemens) or, more simply, Sm−1. It is the ratio of the current density to the electric field strength.

8 0
3 years ago
A granite monument has a volume of 25,365.4 cm. The density of granite is 2.7 g/cms. Use this information to calculate the mass
olchik [2.2K]

Answer:

m = 68,486,6 g is the answer.

Explanation:

To calculate mass you use formula:

m= V*r

To avoid remembering this formula you can see the type of unit on each given variable. We can see that we have g/cm^3 and cm^3. If we multiply them, we negate cm^3 and cm^3 and we are left with g which is unit for mass.

Hope I helped! ☺

8 0
3 years ago
What is efficiency?<br>​
tatyana61 [14]

Explanation:

the state or quality of being efficient or able to accomplish something

5 0
3 years ago
A bar on a hinge starts from rest and rotates with an angular acceleration α = 15+4t, where α is in rad/s2 and t is in seconds.
Arisa [49]

Answer:

230.53°

Explanation:

α = angle in rad / t^2

t =2mins = 2 × 60 = 120sec.

α = angle in rad / 2^2

α = angle in rad / 16

15+4(2) = angle in rad /4

23 = angle/4

23× 4 = angle in radian

92 = angle in radian

But π rad = 180°

1 rad = 180 /π

Therefore

92 rad = 92 ×180/π = 5270.53°

This value is far more so we subtract from 360° continuously till we get a value less than 360°

5270.53- (360×14) =5270.53- 5040

230.53°

3 0
3 years ago
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