Answer:

Answer:

Yes

Explanation:

According to law of conservation of mass, it can neither be created or destroyed. It remains constant. It can change to energy. This can be explained using Einstein's mass energy relation. E= mc^2.

So, the changes such as burning cannot be reversed do obey law of conservation of mass. Suppose wood is burnt. The mass of wood converts into energy and ashes.

Answer:

yes!!! Everything follows the law of

conservation of mass, no matter what

Which of the following changes can happen when the forces on an object are unbalanced?a. The object speeds up b. the object slows down c. the object changes direction d. all of the above

A 0.05-kg car starts from rest at a height of 0.95 m. Assuming no friction, what is the kinetic energy of the car when it reaches the bottom of the hill? (Assume g = 9.81 m/s2.)

Why is the work output always less than the work input?

Which layer of the Earth contains most of the Earth's mass?A.outer coreB.crustC.inner coreD.mantle

Calate the force nessacy to accerate a 0.14 kg hardball at a rate of 100 m/s

A 0.05-kg car starts from rest at a height of 0.95 m. Assuming no friction, what is the kinetic energy of the car when it reaches the bottom of the hill? (Assume g = 9.81 m/s2.)

Why is the work output always less than the work input?

Which layer of the Earth contains most of the Earth's mass?A.outer coreB.crustC.inner coreD.mantle

Calate the force nessacy to accerate a 0.14 kg hardball at a rate of 100 m/s

**Answer:**

**f(t) = 28,7 [N]**

**Explanation: IMPORTANT NOTE: IN PROBLEM STATEMENT CHARGES ARE IN C (COULOMBS) AND IN THE DIAGRAM IN μC. WE ASSUME CHARGES ARE IN μC.**

**The net force on +q₂ is the sum of the force of +q₁ on +q₂ ( is a repulsion force since charges of equal sign repel each other ) and the force of -q₃ on +q₂ ( is an attraction force, opposite sign charges attract each other)**

**The two forces have the same direction to the right of charge q₂, we have to add them**

**Then**

**f(t) = f₁₂ + f₃₂**

**f₁₂ = K * ( q₁*q₂ ) / (0,1)²**

**q₁ = + 8 μC then q₁ = 8*10⁻⁶ C**

**q₂ = + 3,5 μC then q₂ = 3,5 *10⁻⁶ C**

**K = 9*10⁹ [ N*m² /C²]**

**f₁₂ = 9*10⁹ * 8*3,5*10⁻¹²/ 1*10⁻² [ N*m² /C²]* C*C/m²**

**f₁₂ = 252*10⁻¹ [N]**

**f₁₂ = 25,2 [N]**

**f₃₂ = 9*10⁹*3,5*10⁻⁶*2,5*10⁻⁶ /(0,15)²**

**f₃₂ = 78,75*10⁻³/ 2,25*10⁻²**

**f₃₂ = 35 *10⁻¹**

**f₃₂ = 3,5 [N]**

**f(t) = 28,7 [N]**

**Answer:**

facts

**Explanation:**

The atoms/ particles that are in the gas have gotten energy from the heat, because of that, they zoom around the container, putting pressure on it :) hope it helps :)

The **kinetic energy** of the squirrel with a mass of 0.9 Kg running with a **speed** of 4 m/s is 7.5 J.

**Kinetic energy **of an object is a form of energy generated by virtue of the motion of the object. Kinetic energy is dependent on the mass and **velocity **of the body.

When a body starts to move its potential energy starts to convert to kinetic energy and the **kinetic energy** will be maximum at the highest speed. When the object slow down and pause in a position it gains potential energy again.

The kinetic energy KE = 1/2 mv²

Given mass = 0.9 Kg

velocity = 4 m/s.

KE = 1/2 0.9 Kg × 4² m/s

= 7.5 J

Therefore, the kinetic energy of the **squirrel** is 7.5 J.

To find more on **kinetic energy**, refer here:

#SPJ2

**Answer:**

A). Option A

B). Option B

C). Option B

**Explanation:**

Speeding up, slowing down, and changing direction ... like moving along a curve ... are all changes in velocity. They're also all accelerations.

the strength and vitality required for sustained physical or mental activity. It's a noun and not to be rude but isn't there such thing as online dictionary, and... A dictionary

Energy is a property of objects, transferable among them by interactions, which can be converted into different forms but not created or destroyed.

Group - similar reacting properties.

SIMILAR not identical

Period - ever increasing proton number

Answer 2: elements in the same period have the same amount of energy levels (in which electrons orbit around the atomic nucleus)elements in the same group have the same number of valance electrons (which are found in the outer most energy level)

SIMILAR not identical

Period - ever increasing proton number

Answer 2: elements in the same period have the same amount of energy levels (in which electrons orbit around the atomic nucleus)elements in the same group have the same number of valance electrons (which are found in the outer most energy level)