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pickupchik [31]
3 years ago
7

Which of the following items best embodies the physical property of conductivity?

Physics
2 answers:
Sladkaya [172]3 years ago
7 0
C is the correct answer

docker41 [41]3 years ago
6 0
C because a skillet conducts thermal energy from the stove to your food
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A 3.5 kg object moving at 8.1 m/s in the positive direction of an x axis has a one-dimensional elastic collision with an object
Tamiku [17]

Answer:

So the mass of the second object M will be 1.951 kg    

Explanation:

We have given mass of the first object m_1=3.5kg and its velocity v_1=8.1m/sec

Mass of the second object m_2=M  it is at rest so its velocity v_2=0

From conservation of momentum we know that

Initial momentum = final momentum

So m_1v_1+m_2v_2=(m_1+m_2)v

3.5\times 8.1+M\times 0=(3.5+M)5.2

28.35=18.2+5.2M

M = 1.951 kg

8 0
3 years ago
Since vectors always have positive magnitudes, the sum of two vectors must have a magnitude greater than the magnitude of either
Natasha2012 [34]

Answer:

False.

Explanation:

Yes the magnitude of a vector is always positive , but a vector consists of

  • magnitude
  • direction

when two vectors are added their direction may be opposite to each other For example-

a=3i+3j

b=3i-6j ,

then their resultant

r=b+a\\r=3i+3j+3i-6j\\r=6i-3j

This resultant vector's x and y component equal to y and x component of vector b so its magnitude will be equal to magnitude of vector b.

Therefore, the resultant magnitude not necessary equal to the magnitude of either vector.

6 0
3 years ago
PHYSICS HW HELP PLS!! explain how you got it too thank you! :)
Gnesinka [82]

Answer:

Explanation:

Can you please place the square roots in a proper manner so I may assist you?

5 0
3 years ago
How many watt-hours does a 80 watt light bulb use if it runs for 3.5 hours?
coldgirl [10]

Answer:

5 I Think

Explanation:

3 0
3 years ago
How is the acceleration of a car traveling on an elevated air track related to the angle of elevation and the height of elevatio
vitfil [10]

on a given inclined we know that net force is given by

F_{net} = - mgsin\theta

here we know that

F_{net} = ma

so here we have

ma = - mg sin\theta

a = - gsin\theta

so here acceleration depends directly on angle of inclination

now we also know that if height of the inclined is H and its length is L

then we can write

sin\theta = \frac{H}{L}

so the acceleration is given as

a = - g*\frac{H}{L}

so acceleration also depends directly on height of the inclined plane

4 0
3 years ago
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