PHYSICS MIDDLE SCHOOL

Mr. D needs to create a lever with a mechanical advantage of 0.4. If he is going toapply his force 2 meters from the fulcrum, how far away must his load be from the
fulcrum to get the correct mechanical advantage?

Answers

Answer 1
Answer:

Answer:

The distance of load from fulcrum is 5 m.

Explanation:

Given:

Mechanical advantage, MA = 0.4

Distance of force from fulcrum is, \textrm{Effort arm}=2\ m

Distance of load from fulcrum is, \textrm{Load Arm}=?

We know that, Mechanical advantage of a machine is the ratio of the effort arm and load arm.

So, Mechanical advantage is given as:

MA=\frac{\textrm{Effort Arm}}{\textrm{Load Arm}}\n\n0.4=\frac{2}{\textrm{Load Arm}}\n\n\textrm{Load Arm}=(2)/(0.4)=5\ m

Therefore, the distance of load from fulcrum is 5 m.

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While performing an experiment involving a reaction between two chemicals, the scientist observes that the reaction container has become warm. The observation is an example of:

Answers

Explanation:

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In an endothermic reaction, heat is absorbed by the reactant molecules. In this type of reaction, energy of products is more than the energy of reactants.

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John and Daniel are playing tug-of-war together. John is exerting 10 N of force. Daniel is exerting 12 N of force. What is their net force

Answers

We assume that they're pulling in opposite directions ...
that's how this game works.

Daniel completely cancels out John's whole 10N, and he
still has 2N left over.

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​How are particles in motion and temperature related?​
How does a thermometer work?

​What are temperature scales, list them and give examples?

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Please try to answer them as best as you can. There are five questions, and I hope you will be able to answer them all. I really appreciate your help. Thank you!!!

Answers

1) How are particles in motion and temperature related?

Temperature is the measure of heat. The kinetic energy of particles in motion is determined by the temperature.  The higher the temperature, the higher the kinetic energy of the particles (basically, the hotter it is the faster the particles move).

2) How does a thermometer work?

A thermometer measures the average kinetic energy of the particles around the thermometer.  As seen in 1), the kinetic energy defines the temperature, so measuring the energy of the particles can show you the temperature of the object.

3) What are temperature scales, list them and give examples.

Temperature scales are pretty much systems with which we compare different temperatures.  The three widely used temperature scales today are Fahrenheit, Celsius, and Kelvin. All three are used in different countries and mainly for different purposes. Fahrenheit is used only in the United States and a few other countries around the world, while Celsius is excepted by nearly the entire rest of the world. Kelvin is used primarily in the scientific setting.

4) Define volume.

Volume is pretty much the amount of three-dimensional space an object or substance takes up.  For example, a liter is a unit of measurement of volume.  A two-liter bottle of soda means it contains the amount of soda that fills up 2-liters worth of three-dimensional space.

I hope this helped.

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Answers

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Answers

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Answers

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