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tankabanditka [31]
3 years ago
9

Identify the conditions for an inelastic collision in a closed system. Check all that apply.

Physics
2 answers:
jeyben [28]3 years ago
6 0

Answer:  Energy is conserved.

Momentum is conserved

One object may be stationary before an inelastic collision.

Explanation:

goldfiish [28.3K]3 years ago
3 0

teo objects hit and stick together

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A migrating robin flies due north with a speed of 12 m/s relative to the air. The air moves due east with a speed of 6.7 m/s rel
mafiozo [28]

Here it is given that speed of migrating Robin is 12 m/s relative to air

so we can say that

\vec v_{ra} = 12 m/s North

so it will be

Let North direction is along Y axis and East direction is along X axis

\vec v_{ra} = 12\hat j

also it is given that speed of air is 6.7 m/s relative to ground

\vec v_a = 6.7 \hat i

now as we know by the concept of relative motion

\vec v_{ab} = \vec v_a - \vec v_b

\vec v_{ra} = \vec v_r  - \vec v_a

now by rearranging the terms

\vec v_r = \vec v_{ra} + \vec v_a

\vec v_r = 12 \hat j + 6.7 \hat i

now we need to find the speed of Robin which means we need to find the magnitude of its velocity which we found above

So here we will say

v_r = \sqrt{12^2 + 6.7^2}

v_r = 13.7 m/s

so the net speed of Robin with respect to ground will be 13.7 m/s

7 0
3 years ago
Why bananas are curved
Vinil7 [7]
Because they built:different
6 0
3 years ago
Read 2 more answers
Preschool girls and boys do not differ in the amount of muscle they have<br> 1) True<br> 2) False
Marina86 [1]

Explanation:

False...............

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3 years ago
An electric power plant uses energy from burning coal to generate steam at 450∘C. The plant is cooled by 20∘C water from a nearb
Goryan [66]

Answer:

40 MJ (D)

Explanation:

Quantity of heat (Qh) = 100 MJ

temperature of steam (Th) = 450°c = 450 + 273 = 723 K

emperature of water (TI) = 20 °c = 20 + 273 = 293 k

efficiency = (Qh-Qi)/Qh = (Th-Ti)/Th

 \frac{100x10x^{6}-Qi }{100x10^{6}} = \frac{723-293}{723}

100x10^{6} - Qi= 0.5947 x 100 x 10 ^{6}

100x10^{6} - (0.5947 x 100x10^{6}) = Qi

Qi = 40.5 MJ equivalent to 40 MJ (D)

6 0
3 years ago
You do a certain amount of work on an object initially at rest, and all the work goes into increasing the object’s speed. If you
EleoNora [17]

Answer:

\sqrt{2}v

Explanation:

The work done on the object at rest is all converted into kinetic energy, so we can write

W=\frac{1}{2}mv^2

Or, re-arranging for v,

v=\sqrt{\frac{2W}{m}}

where

v is the final speed of the object

W is the work done

m is the object's mass

If the work done on the object is doubled, we have W' = 2W. Substituting into the previous formula, we can find the new final speed of the object:

v'=\sqrt{\frac{2W'}{m}}=\sqrt{\frac{2(2W)}{m}}=\sqrt{2}\sqrt{\frac{2W}{m}}=\sqrt{2}v

So, the new speed of the object is \sqrt{2}v.

3 0
3 years ago
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