Answer:
Look it up
Explanation:
If you don't know then look it up
a horizontal row on the periodic table is called a______________________? Please help !!!!!!!!
Answer:
Period
Explanation:
horizontal is a period and verticle is a group
Answer: There called periods.
Which describes an atom that has fewer neutrons than protons and more electrons than protons?
1. Negative Compound
2. Positive Compound
3. Positive Ion
4. Negative Ion
Help!
Answer:
3. Negative Ion
a negative Ion has more electrons then protons and there are more electrons
hope this helped ^^
Nick wanted to see how high an ice cube would float in different temperatures of water. Identify the dependent variable.
A. amount of water
B. height of ice cube
C. size of ice cube
D. temperature of water
E. temperature the ice cube was at its' highest height
Answer:
B. height of ice cube
Explanation:
The height of the ice cube depends on the fifferent emperatures tof the water. You just need to remember that the dependent variable is dependent on the independent variable.
Use the chemical reaction to answer the question. CaCO3→CO2+CaO A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown.
What is the total mass of the products?
A. 10 grams
B. 15 grams
C. 30 grams
D. 60 grams
Use the chemical reaction to answer the question. Fe+O2→Fe2O3 What happens to atoms of Fe and O2 during the reaction?
A. They are lost.
B. They maintain their properties.
C. They are rearranged.
D. They gain mass.
What is most likely to occur during a chemical reaction?
A. Molecules of the original substance are lost.
B. Mass is conserved.
C. The original substance maintains its properties.
D. New atoms are created.
Use the chemical reaction to answer the question. NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2 A student mixes baking soda (NaHCO3) and acetic acid (HC2H3O2) to produce a chemical reaction shown.
Which statement about the reaction is correct?
A. There are more H atoms after the reaction.
B. The atoms of the reactants are regrouped during the reaction.
C. Atoms of Na are destroyed during the reaction.
D. Some atoms gain mass after the reaction.
Use the chemical reaction to answer the question. 2H2+O2→2H2O There are four atoms of hydrogen (H) before the reaction.
How many atoms of hydrogen are present after the reaction?
A. 5
B. 4
C. 2
D. 8
PLEASSSSSSSE ANSSSSWER ALL THE QUESTIONS------------
The total mass of products obtained in the reaction; CaCO3→CO2+CaO is 30 grams. Given the reaction; Fe+O2→Fe2O3, atoms of Fe and O2 are rearranged during the reaction. During a chemical reaction, mass is conserved. Given the reaction NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2, we can see that the atoms of the reactants are regrouped during the reaction. Given the reaction 2H2+O2→2H2O, there are four atoms of hydrogen before and after the reaction.
According to the law of conservation of mass, atoms are neither created nor destroyed in a chemical reaction. Similarly, mass is neither created nor destroyed.
This means that the number of atoms of each element before and after the reaction must remain the same. A chemical reaction only involves the rearrangement of atoms in reactants to form products.
The total mass of reactants must be equal to the total mass of products according to the law of conservation of mass.
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MATCH THEM TOGETHER 4. diffraction 5. interference 6. constructive interference 7. destructive interference 8. standing wave 9. resonance a. interaction of two waves that results in a wave with a larger amplitude b. a wave that appears to stay in one place c. increase in amplitude that occurs when external vibrations match an object’s own natural frequency d. interaction of two waves that results in a wave with a smaller amplitude e. the bending and spreading out of waves around the edge of a barrier f. interaction between two waves that meet
Answer:
Explanation:
a. is constructive interference
b. is standing wave
c. is resonance
d. is destructive interference
e. is diffraction
f. is interference
Hope this helped :)
hey can someone help me with this please I have two other ones I need help with also
Answer:yea
Explanation:
1)156
2)341
3)262
4)3242
5) my friend
Justin usually blows his nose using Kleenex tissues. His snot keeps leaking through the tissue. He decided he is going to create an experiment to find out if there is something better. What is his dependent variable?
A. amount of tissue
B. Kleenex
C. mass of the snots the tissue can hold
D. type of tissue
E. Justin
Answer: c
Explanation:
Dependent Variable is what you measure, he's measuring the amount of snot that can be held
This atom is an __________ of the other atom.
Answer: carbon
Explanation:
because i took notes on atoms last week
2. Calculate the following net forces.
a. Two people push a couch across a room. One pushes with 30 N. The other pushes with 50 N.
b. An uncle plays tug-of-war with his niece and nephew. The uncle pulls one side of the rope with a force of 95 N. The niece and nephew pull the other side of the rope with a force of 40 N and 45 N.
c. Two friends push their friend on a swing with a combined force of 15 N and 20 N.
Text to speech
Answer:
A. The net force is 80 N.
B. The net force is 10 N going more towards the Uncle than the children.
C. The net force is 35 N.
Explanation:
Net force is the sum of the amount of force on either one side (addition) or two sides (subtraction).
Force is an external agent which is responsible for changing a body's state of rest or motion. It is the push or pull on an object. The net forces acting on the body are 80 N, 10 N and 35 N.
What is a net force?The sum of all the forces acting on an object is defined as the net force. The net force is able to accelerate a mass. The net force is known as a term which is used in a system when there is a significant number of forces.
When we apply a force on a body, apart from the applied force, there are many other forces acting like gravitational force, frictional force and the normal force.
The net force acting on a body is given as:
Fnet = F₁ + F₂ + F₃ + .....Fₙ
a. Fnet = 50 + 30 = 80 N
b. Fnet = 95 - (40 + 45) = 10 N
c. Fnet = 20 + 15 = 35 N
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What is the mass number of an atom?
Answer:
it’s total number of protons and neutrons
I need this ASAP! Thank you!
Answer:
35
Explanation:
You look at it straight and at the lowest point the liquid fills to.
Tiffany was investing how fast it took Hayden to react to different sounds. Identify the dependent variable.
A. different sounds
B. how fast Hayden reacted
C. playing the trumpet over and over
D. Hayden
Answer:
B
Explanation:
I think
Identify two characteristics shared among transverse waves, longitudinal waves, and surface waves.
Answer: For transverse waves, the waves move in perpendicular direction to the source of vibration.
For longitudinal waves, the waves move in parallel direction to the source of vibration .
They are similar within the sense that energy is transferred within the kind of waves.
Explanation:
The shared characteristics between traverse, longitudinal and surface waves include :
Traverse, longitudinal and surface waves are all mechanical waves They only transport energy without transporting matter.Mechanical waves are simply waves which requires a material medium to propagate. They include longitudinal, surface and traverse waves.
Also, all three waves transfer energy through a medium without the transfer of materials or matter in the medium.
Therefore, all three waves are mechanical waves and do not transfer matter.
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Tiffany was investing how fast it took Hayden to react to different sounds. Identify the independent variable.
A. how fast Hayden reacted
B. different sounds
C. playing the trumpet over and over
D. how much time it took Hayden to react
E. Hayden
Answer:
B. Different sounds
Explanation:
The independent variable is the variable that changes. So B is the independent variable because the sounds are what change.
Different sounds are the independent variable. Hence, option B is correct.
What is the independent variable?It is a variable that stands alone and isn't changed by the other variables you are trying to measure.
The independent variable is the variable that changes.
So B is the independent variable because the sounds are what change.
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Even though the process of calling someone requires that a signal go across many miles, a call happens very quickly. How can that be?
A telephone signal uses radio waves which travel at the speed of light.
Traditional communication between people was a Herculean task before the advent of technology. It was quite difficult to pass messages from one point to another.
However, when you call a person on phone, the signal travels across miles speedily because telephone communication makes use of radio waves which are electromagnetic waves and travel at the speed of light.
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i need help on this question ASAP
Answer: well because
they have a different mass but the triangles have all the same acceleration the house is going to have more force added to it.
Explanation:
what is the symbol for halogen on the periodic table? can u please help me????
Answer:
the halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).
Explanation:
what is nitrogen metal nonmetal metalloid PLEASE HELP ME!!!!!!!!!!
Answer:
nonmetal
Explanation:
Are the forces on an object in motion balanced? Why or why not?
Answer:
An object's motion can be changed by unbalanced forces. Balanced forces do not change the motion of an object. The motion of an object will not change if the forces pushing or pulling the object are balanced. An object that is sitting still will stay still if the forces acting on it are balanced.
