CHEMISTRY MIDDLE SCHOOL

What physical property makes metal pots good for cooking?

Answers

Answer 1
Answer:

Answer is: heat conductivity.

Thermal conductuction is the transfer of heat through physical contact. Thermal conduction is the transfer of heat by microscopic collisions of particles. Heat spontaneously flows from a hotter to a colder body.

The process of heat conduction depends on four basic factors: the temperature gradient, the cross section of the materials involved, their path length and the properties of those materials.

Metallic bond increace electrical and thermal conductivity.  

Metals conduct heat, because when free moving electrons gain energy (heat) they vibrate more quickly and can move around.  
Answer 2
Answer: Metal pots are good for cooking because they have heat conductivity.

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How is gamma radiation different from other types of electromagnetic radiation? It has higher energy and higher frequency. It has higher energy and lower frequency. It has lower energy and higher frequency. It has lower energy and lower frequency.
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A pea plant had purple flowers. What alleles for flower color could the sex cells carry?

Which are always the first waves of an earthquake to be detected?

Answers

Answer:

The first kind of body wave is the P wave or primary wave.

Explanation:

This is the fastest kind of seismic wave, and, consequently, the first to 'arrive' at a seismic station.

Which of the following energy changes occurs as a bow is drawn and released?1. gravitational potential to chemical potential
2. magnetic potential to kinetic
3. elastic potential to kinetic
4. kinetic to thermal

Answers

Answer: The correct answer is 3.

Explanation: As the bow is drawn and released, it will experience a change in elastic potential energy to kinetic energy.

Elastic potential energy is defined as the amount of potential energy which is stored as a result of the deformation of the object which has some elasticity in it. For Example: Stretching of a spring, Drawing of a bow, etc..

Kinetic energy is the energy of the object which is possessed as a result of its motion.

When the bow is drawn, it first had some elastic potential energy and when it is released it had some kinetic energy in it.

Conclusion: The correct answer is 3.
3. elastic potential to kinetic
Mechanical energy is the top suject while it has two types: Kinetic energy which is the energy in motion and potential energy which is the energy in reserve. The measure of both energy in motion and reserve is called Joules. Joules then is the International System of Measurement unit for energy, this is mainly used to account for scaling energy in all aspects. 

This reaction describes cellular respiration. C6H12O6 + 6O2 → 6CO2 + 6H2O Which compounds are the reactants and which are the products? A. reactants: C6H12O6 + 6O2 products: 6CO2 + 6H2O B. reactants: 6CO2 + 6H2O products: C6H12O6 + 6O2 C. reactants: 6CO2 + C6H12O6 products: 6H2O + 6O2 D. reactants: 6H2O + 6O26CO2 + C6H12O6 products: 6CO2 + C6H12O6

Answers

Answer: The correct answer is Option A.

Explanation:

In a chemical equation, the chemical species are termed as reactants or products.

Reactants are defined as the species which react in the reaction and are written on the left side of the reaction arrow.

Products are defined as the species which are produced in the reaction and are written on the right side of the reaction arrow.

For the given chemical equation:

C_6H_(12)O_6+6O_2\rightarrow 6CO_2+6H_2O

The chemical species written on the left side of the arrow are C_6H_(12)O_6\text{ and }6O_2. They are considered as reactants.

The chemical species written on the right side of the arrow are 6CO_2\text{ and }6H_2O. They are considered as products

Hence, the correct answer is Option A.
The reactants are C6H12O6 (Glucose) and 6O2 (Oxygen) and the products are 6CO2 (Carbon Dioxide) and 6H20 (Water)

If a substance has a large mass and a small volume what can you conclude about it

Answers

I could conclude, based on that information, that the density of the substance is quite high.
You can conclude that the substance has a very high density! 

A rock at the top of a 30 meter cliff has a mass of 25 kg. Calculate the rock’s gravitational potential energy when dropped off the cliff. Assuming that energy is conserved and there is no air friction and gravity is 9.8 m/sec., at the bottom of the cliff the rock’s potential energy is completely converted to kinetic energy. Use the formula for kinetic energy to calculate the rock’s speed at the bottom of the cliff. Show all calculations.

Answers

Lets see:-

We have our formula for potential energy, which we are trying to solve for, 

PE = mgh  or  potential energy = mass * gravity * height

So we know that PE all depends on these. 

Height :  30 meters
Mass : 25 kg
Gravity (which is always constant) : 9.8 m/s/s

Now add into formula. 

PE = 25*30*9.8 
PE = 7350 Joules

Answer: PE = 7350 Joules

Now calculate speed:-

7,350 joules/12.5 kg  =  speed-squared
 588 m²/s²  =  speed-squared
 about 24.248 m/s

What is the shortest half life

Answers

Answer:

Hey!

Your answer is element A

Explanation:

Using the graph, the element A's emission of radioactive particles ends approximately after 6 years...

A HALF-LIFE IS "HALF" OF THAT TIME PERIOD!

So if the radiation goes for 6 years the half-life is 6 divided by two which gives you 3 years!

The rest however have a longer half-life...

Because they all end at 14 yrs so their half-life in 7 years!

HOPE THIS HELPS!!
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Locate the element xenon (Xe) on the periodic table and click on the square. What class of element is xenon found in? A)nonmetal B)halogen c)noble gas D)alkali metal