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2 years ago

Which law states that energy is neither created nor destroyed? a. Law of Conservation of Mass

Physics

2 answers:

Brrunno [24]2 years ago

7 0

Answer:

C. Law of Conservation

Softa [21]2 years ago

5 0

Answer:

c. Law of Conservation of Energy

Explanation:

Multiple choice

Which law states that energy is neither created nor destroyed?

<u> Law of Conservation of Energy</u>

the law of conservation of mass -- is that a mass can neither be created nor destroyed in a chemical reaction

newtons law of motion -- shows the relationship between the forces and motion of an object

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our friend is constructing a balancing display for an art project. She has one rock on the left (ms=2.25 kgms=2.25 kg) and three

Licemer1 [7]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The torque produced by the pile of rocks is $\tau = 35.63\ N \cdot m$

The distance of the single for equilibrium to occur is $r_s =1.62 \ m$

Explanation:

From the question we are told that

The mass of the left rock is $m_s = 2.25 \ kg$

The mass of the rock on the right $m_p = 10.1 kg$

The distance from fulcrum to the center of the pile of rocks is $r_p = 0.360 \ m$

Generally the torque produced by the pile of rock is mathematically represented as

$\tau = m_p * g * r_p$

Substituting values

$\tau = 10.1 * 9.8 * 0.360$

$\tau = 35.63\ N \cdot m$

Generally we can mathematically evaluated the distance of the the single rock that would put the system in equilibrium as follows

The torque due to the single rock is

$\tau = m_s * g * r_s$

At equilibrium the both torque are equal

$35.63 = m_s * r_s * g$

Making $r_s$ the subject of the formula

$r_s = \frac{35.63 }{m_s * g}$

Substituting values

$r_s = \frac{35.63 }{2.25 * 9.8}$

$r_s =1.62 \ m$

6 0

3 years ago

The effects of repeated temperature changes within the cracks in rocks can cause ______ weathering.

Snezhnost [94]

C. Mechanical, because temperature can cause solid objects to expand and contract, causing rocks to split apart.

4 0

2 years ago

Read 2 more answers

A balloon is expanded to the same volume as that of a human head. Do an order-of-magnitude estimate of the volume of this balloo

cestrela7 [59]

Answer:

Volume of balloon = 1000 cm^3

Explanation:

The head of a normal person can be assumed as a sphere with radius 10 cm.

Volume of sphere $=\frac{4}{3} \pi r^3$ , where r is the radius.

We have approximate radius = 10 cm.

Approximate volume of head $=\frac{4}{3} \pi r^3=\frac{4}{3} *\pi* 10^3=4188cm^3$

In the given options the closest value to the approximate volume is 1000 cm^3.

So, volume of head = Volume of balloon = 1000 cm^3

4 0

2 years ago

How do skiers slide across the ice?

Eduardwww [97]

The ice and how the blades are made

7 0

2 years ago

Taigas, tundra and tropical rainforests share what common abiotic component?

e-lub [12.9K]

Answer:

water

Explanation:

hope this helps

6 0

2 years ago