what caused light to appear bent when it refracts ?
Answer:
Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density). This change of direction is caused by a change in speed. ... When light enters a more dense substance (higher refractive index), it 'bends' more towards the normal line.
Gold can be pounded out to make a foil only a few atoms thick because of
A. Metallic Bonds
B. Ionic Bonds
C. Valence Bonds
D. Covalent Bonds
Answer:
A. Metallic Bonds
Explanation:
Metallic bonding is a type of chemical bonding that arises from the electrostatic attractive force between conduction electrons and positively charged metal ions.
The large number before a molecule in a chemical formula is called a _______________.
O subscript
O coefficient
O equation
Answer:
Subscript
Explanation:
The little number you see to the right of the symbol for an element is called a subscript. That number indicates the number of atoms of that element present in the compound. When balancing an equation, you can change the coefficients but not the subscripts.
hope this helps! if not, it's got to be coefficient or equation
how are heat, temperature, and thermal energy related?
Answer:
Heat, temperature, and thermal energy are related because they all work with each other.
Explanation:
First of all, everything start's off with temperature. It starts off low. But when heat is added to it, it rises and the temperature goes up. This causes thermal energy to the objects touching it. The hotter it is the faster the particles move and the more kinetic energy they have.
A homogenerous mixture is a mixture where you can see the different parts.
True
or
False
Answer:
the nwser is false
Explanation:
Its false becuase Homomogeneous means "One" and if you can see different parts of it then its not homogeneous. hope this helps!
How do neutral metal atoms form ions?
Answer:
Neutral atoms can be turned into positively charged ions by removing one or more electrons. ... Atoms that gain extra electrons become negatively charged. A neutral chlorine atom, for example, contains 17 protons and 17 electrons. By adding one more electron we get a negatively charged Cl- ion with a net charge of -1.
Gasoline contains chemical potential energy. When you place gasoline in a car, you use up the gasoline and have to refill your gas
tank. How can a teacher state that energy can neither be created nor destroyed in light of this observation?
A)
The teacher is only talking about chemical reactions.
B)
The teacher is stating a theory and not an actual law.
0)
This is an exception to the law of conservation of energy.
D
The energy must be converted into different forms like motion and heat
How many CARBON atoms are present in 2C3H8O3 ?
Answer:
b
Explanation:
I need more help on the other chart please
Calculating pH
see chart below
Answer:
2, acidic, 5, acidic
Explanation:
pH = -log[H+], where [H+] is the concentration of H+.
Using the data in the table, you can calculate the pH:
-log[1e-2] = 2
-log[1e-5] = 5
To find out whether it is acidic, basic, or neutral, use a pH scale. Anything less than 7 is acidic, anything over is basic. Knowing this, both (except the middle, which you did correctly) are acidic.
;)
A bag contains 3 red marbles, 3 blue marbles and 1 green if a marble is drawing from the bag at random what is the chance of the marble being blue
Answer:
three-seventh
Explanation:
A gas occupies occupies a volume of 0.2 L at 76 mmHg. What volume will the gas occupy at 760 mmHg?
Answer:
0.02
Explanation:
To solve this problem we use the Boyle's law equation
P1V1 = P2V2
P1 = 76mmHg
V1 = 0.2L
P2 = 760mmHg
V2 = unknown
Substituting values into the equation;
76mmHg * 0.2L = 760mmHg * v2
15.2 = 760V2
Divide through by 760 to get v2
15.2/760 = 0.02
So the gas will occupy a volume of 0.02 at 760mmHg
What would happen to the position of the equilibrium when the following
changes are made to the equilibrium system below?
250 (8) - 250_(g) + O2(g)
Sulfur trioxide is removed from the system.
A. Shifts Left
B.Shifts Right
HElPpp AsAPp I’ll mark you as brainlister!!
A gas has a volume of 900.0 mL at 35.0°C and 400.0 atm. What would the volume of the gas be at 258 °C and 700.0 atm of pressure?
Answer:
887 ML
Explanation:
yup
When liquid H2O is chemically separated in a scientific investigation it forms H2 gas and O2 gas. If the number of hydrogen and oxygen molecules does not change through the equation, then the mass will
Select one:
decrease from reactants to products.
stay the same from reactants to products.
increase from products to reactants.
increase from reactants to products.
Solve for final product and show work for Na + NO3 ?
Sodium (Na) is atomic number 11, so it has 1 valency
While Nitrate (NO₃) has valency 1
Sodium has an extra electron while nitrate needs an extra electron, sodium gives its electron to nitrate and forms a bond,
NaNO₃ (Sodium nitrate)
Happy to help :)
100 cm3 of the copper sulfate solution contains 1.8 g of copper sulfate.
Calculate the mass of copper sulfate in 25 cm of this copper sulfate solution.
Answer:
The mass of copper sulfate in 25 cm³ of the copper sulfate solution is 0.45 g
Explanation:
The given parameters are;
The volume of the copper sulfate solution = 100 cm³
The mass of the copper sulfate in the solution = 1.8 g
Therefore, the mass of copper sulfate in 25 cm³ of the solution is given as follows;
The mass of copper sulfate in 100 cm³ of the solution = 1.8 g
The mass of copper sulfate in 1 cm³ of the solution = 1.8 g/100 = 0.018 g
Therefore;
The mass of copper sulfate in 25 × 1 = 25 cm³ of the solution, m = 25×0.018 g = 0.45 g
∴ The mass of copper sulfate in 25 cm³ of the solution, m = 0.45 g
The heart, arteries, and veins are all part of what body system?
Answer:
The circulatory system.
Explanation:
All of them are in charge of pumping blood and oxygen throughout the body, which is the job of the circulatory system.
C + O2 + CO2
What type of reaction occurs when carbon dioxide is formed from carbon and oxygen?
Answer:
combustion reaction.Explanation:
It is a combination reaction as carbon combines with oxygen to form carbon dioxide. It is a combustion reaction as carbon is burnt in the presence of oxygen.
21. What is an electron energy level?
Ture or False: air has its components spread evenly, so it is considered a homogenous mixture.
Answer:
True.
Explanation:
The composition of a mixture is varied by altering the proportions of its constituents. True. Solutions are heterogeneous since the ratio of solute to solvent does not remain the same throughout the solution.
What causes circulation of air
The circulation of wind in the atmosphere is driven by the rotation of the earth and the incoming energy from the sun. Wind circulates in each hemisphere in three distinct cells which help transport energy and heat from the equator to the poles. The winds are driven by the energy from the sun at the surface as warm air rises and colder air sinks.
Answer: The circulation of wind in the atmosphere is driven by the rotation of the earth and the incoming energy from the sun. Wind circulates in each hemisphere in three distinct cells which help transport energy and heat from the equator to the poles.
Explanation:
Why aren’t dominant genes ALWAYS more common?
Answer:
selective breeding
Explanation:
Example: pretend that rabbits can only be brown or black and black is dominant. If only the brown rabbits reproduce it will eventually be more common Hope this helps
The question and options are below {the attachment}
I don't have much time, so please help me!
TIME REMAINING
36:00
Answer:
i think its B
Explanation:
Based on what you have read about wind turbines and dams, how does a generator work? A loop of Answer spins in a Answer field, producing Answer current. Item
Based on what you have read about wind turbines and dams, how does a generator work? A loop of ______ spins in a ______ field, producing ______ current.
Answer:
Wire
Magnetic
Electric
Explanation:
The generator works on the principle of converting mechanical energy into electrical energy.
For example in a wind turbine generator, the mechanical energy is the wind that pushes the blades of the turbine directly that leads to conversion of this it's linear motion to the rotary motion required to make rotor of the generator to spin. Finally, the harder the wind pushes, the more the mechanical energy applied and consequently, the more electrical energy can be generated.
Now, all generators work because of the effect of the magnetic field moving past an electrical coil.
Thus, the movement of a magnet across a single loop of wire produces a voltage that is induced within the wire loop as a result of the magnetic field produced by the magnet.
As a voltage is induced across the wire loop, electrons begin to flow around the loop thereby generating electric current.
can anyone help me with the last question.
it whould help me a ton
Radioactivity is the -------------- disintegration of an atomic nucleus that releases energy to become stable *
a. Extraordinary
b. Normal
c. Ordinary
d. Spontaneous
Answer:
The answer is spontaneous.
Which led to the formation of oceans after water on Earth’s surface evaporated?
Answer:
Explanation:
En tiempos de la formación de la Tierra, el planeta se encontraba a una elevada temperatura, por lo que no le resultaba posible retener ningún tipo de atmósfera. La ausencia de nubes de vapor de agua y océanos en la tierra primigenia era causa directa de su temperatura, ya que el agua se encontraba combinada con los materiales rocosos.
what happens to the electrons in an ionic bond and a covalent bond?
Answer:
In ionic bonding, atoms transfer electrons to each other. Ionic bonds require at least one electron donor and one electron acceptor. In contrast, atoms with the same electronegativity share electrons in covalent bonds, because neither atom preferentially attracts or repels the shared electrons.
Answer:
In ionic bonding,
atoms transfer
electrons to each
other. Ionic bonds
require at least one electron
donor and one electron
acceptor. In contrast, atoms
with the same electronegativity
share electrons in covalent
bonds, because neither atom
preferentially attracts or repels
the shared electrons.
can someone list these in correct order? from least brigehst to brightest?