3 years ago

Which of the following variables are conserved?

Physics

1 answer:

olganol [36]3 years ago

8 0

Answer: C

Explanation:

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Convert the following in to SI units without changing its values<br> a. 4000 g <br>b. 2.4 km

lana66690 [7]

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i believe i explained this answer properly in my last answer but it would be 4kg and 2400m as these are the SI units for these values.

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Out of aluminum,copper,steel,and glass.Which material do you think will be the best thermal conductor?

Nastasia [14]

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3 years ago

A sled of mass m is coasting on the icy surface of a frozen river. While it is passing under a bridge, a package of equal mass m

sweet [91]

Answer:B

Explanation:

Given

mass of Sled is m

another package of mass m is thrown on it

Suppose u be the initial velocity of sled

conserving momentum

$mu=2mv$

$v=\frac{u}{2}$

where v is the final velocity

Initial kinetic energy $=\frac{1}{2}mu^2$

Final Kinetic Energy $=\frac{1}{2}(2m)\cdot (\frac{u}{2})^2$

Final Kinetic Energy $=\frac{1}{2}\times \frac{1}{2}mu^2$

Final kinetic Energy is half of initial

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3 years ago

Two boys with masses of 40 kg and 60 kg stand on a horizontal frictionless surface holding the ends of a light 10-m long rod. Th

zlopas [31]

When they meet the 40-kg boy would have moved a distance of 6 m.

<h3>Distance moved by the 40 kg boy</h3>

Apply the principle of center mass;

Take the 40 kg mass as the reference point;

X(40 kg) = (40kg x 0 + 60kg x 10 m)/(40 kg + 60 kg)

X(40 kg) = (600)/(100)

X(40 kg) = 6 m

Thus, when they meet the 40-kg boy would have moved a distance of 6 m.

Learn more about distance here: brainly.com/question/2854969

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2 years ago