Answer:
Mass would be 14 amu
Explanation:
How/when is gold used
Answer:
Gold has been used to make ornamental objects and jewelry for thousands of years. Gold nuggets found in a stream are very easy to work and were probably one of the first metals used by humans. Today, most of the gold that is newly mined or recycled is used in the manufacture of jewelry.
Question 9 of 10
What type of force slows down a skydiver?
A. Gravity
B. Friction
C. Air resistance
O D. Magnetic force
Answer:
C air resistance is the answer
Hello please help ty
Answer:
C
B
D
A
Could I please have BRAINLIEST.
Convert 1.350 atm into mmHg
Answer:
1026
Explanation:
Pressure
1.35
Standard atmosphere
=
1026
Millimetre of mercury
Formula
multiply the pressure value by 760
Answer:
multiply the pressure value by 760
A metal block with a temperature of 30°C is placed inside a bowl of water with a temperature of 45°C. Which of the following will occur when the metal block is placed inside the Bowl water?
Answer: The water will cool down
Explanation:
Both the water and the metal block will reach Thermal equilibrium which is a state where neither of them will be transferring energy (heat) to the other because they are now of the same temperature.
For instance, if you put a cold can in water to warm it up, the water will keep reducing in temperature while the cold can increases in temperature until both the can and the water have the same temperature.
The same logic applies here. The metal block is cooler than the water so the water will cool down and the metal block will get more heat until both of them achieve a temperature somewhere between the temperatures that both the water and the block started off with.
Identify the difference between natural and artificial dyes.
HURRY I WILL GIVE 50 PTS
The dependent variable is the variable that is measured during an experiment and can also be seen as the “data.”
A. True
B. False
Answer:
A
Explanation: because it change as so do ur data
Answer:
True
Explanation:
Earth's gravitational potential energy: GPE = mgh = Gravity (9.81m/s2)
Mass (kg) x Height (m)
Kinetic energy: KE=
- 2 mu?
How would you calculate the gravitational potential energy of a 2 kg bottle of
soda falling off of a kitchen table that is 0.76 m tall?
A.
(2) 0.76)
9.8
O B. 20.76)(2)
O c. 120762)
D. (2)(0.76)9.8
Answer:
(2)×(9.8)×(0.76)
Explanation:
Given data:
Mass of bottle = 2 kg
Given height = 0.76 m
Gravitational potential energy of bottle = ?
Solution:
Formula:
Gravitational potential energy = mgh
g = 9.8 m/s²
Now we will put the values in formula.
Gravitational potential energy = 2kg×9.8 m/s²×0.76 m
Gravitational potential energy = 14.896 kg.m².s⁻²
j = kg.m².s⁻²
Gravitational potential energy = 14.896 j
All of the following are ways energy is transferred EXCEPT ______.
use of batteries
movement of waves
movement of objects
movement of heat
Answer:
use of batteries
Explanation:
while im not 100% on this, I know the energy transferred between objects is heat and all three of the other answers cause heat or movement of objects and batteries do not.
Energy can be transformed from one form to the other and can tranfered from one medium to the other. All the given are ways through which energy is transferred except the movement of objects.
What is energy conservation?Energy can neither be created nor be destroyed. Thus total energy of a system will be conserved. However, energy can be transformed from one form to the other.
For example in batteries the chemical energy is converted into electrical energy where, the energy is transferred to different electrical components.
Similarly, the electrical energy is converting to mechanical energy and we make the devices working. When an object stays at rest the energy stored in it is called potential energy.
The energy generated by virtue of motion of a body is called kinetic energy. Therefore, movement of an object results in the transformation of potential energy into kinetic energy. But here the energy is not transferred to any other thing.
Movement of heat is the transfer of thermal energy.Movement of waves is the transfer of energy. Thus option C is correct.
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An atom emits a photon with energy 7.13 electronvolts (eV). What is the wavelength of the photon?
a. 279 nm
b. 174 nm
c. 114 nm
d. 108 nm
Answer:
Option (b) "174 nm"
Explanation:
Energy of emitted photon is 7.13 eV.
We need to find the wavelength of the photon.
1 eV = 1.6 × 10⁻¹⁹ J
Energy of a photon is given by :
[tex]E=\dfrac{hc}{\lambda}[/tex]
Where, [tex]\lambda[/tex] is wavelength of the photon
Putting all the values,
[tex]\lambda=\dfrac{hc}{E}\\\\\lambda=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{7.13\times 1.6\times 10^{-19}}\\\\\lambda=1.74\times 10^{-7}\ m\\\\\text{or}\\\\\lambda=174\ nm[/tex]
So, the wavelength of the photon is 174 nm.
the following isotope has
How far is one nautical mile?
Does a hypothesis need to be correct for an experiment to be a success? Explain why or why not?
Answer:
No it does not need to be correct to be a success. It would just need to be reasonable and possible for you to do so that you dont hypothesize that animals are actually human because that is unlogical and impossible
Explanation:
Answer:
No, of course not.
Explanation:
The goal of a hypothesis is for the researchers to determine whether or not they accurately guessed what would happen in their experiment. The fact that the hypothesis was right or wrong has no effect other than if the researchers had a correct educated guess.
Cooperative relationships occur between
O A. members of different species
O B. members of the same species
O C. members of any species that live together
Answer:
B MEMBERS OF THE SAME SPECIES
I HAVE NO EXPLANATION BECAUSE THIS IS EASY
How can you tell the most abundant isotope?
A. It has the largest mass.
B. Its mass is farther from the average.
C. It’s mass is closest to the average.
Answer:
C: the mass is closest to the average
At a school carnival, Suki watch the clown fill balloons from a metal tank of helium gas she never knew that helium balloons could be filled from a tank light days. She had no clue that gases could be held in a tank, she's only seen gas and balloons. Which property of the helium gas changes as it moves into the balloon?
A. Color
B. Mass
C. Smell
D. Volume
Answer:
b
Explanation:
Is this right?
Can you please help
Thanks
Answer:
yes, I think
Explanation:
given 1kg= 2.20 lbs, how many kilograms are in 338 kg
Answer:
154
Explanation:
The negatively-charged particle without a real mass that exists outside the nucleus
Electrons should be your answer!
2. Matter can be described and classified by its observable properties. One property of solids, liquids, and gasses is they all have volume. Which statement best defines the volume of an object?
A. The amount of space that matter occupies
B. The amount of matter in an object
C. The measure of the force of gravity on an object
D. The number of grams in one cubic centimeter
3.When matter changes from a solid to liquid or from liquid to gas, what kind of change takes place?
A.Chemical change
B. Physical change
C. Thermal change
D. Energy change
4. Darius tears a page of newspaper into pieces to start a campfire. What kind of changes taking place as the paper is torn?
A. A change in matter
B. A change in the substance
C. A change in physical property
D. A change in chemical property
5. Mina is attending cooking school, where she prepares a different mixtures of ingredients. She works with homogenous and homogenous mixtures. Today she is using honey and salsa. What kind of mixtures are these ingredients?
A.Neither is a mixture.
B. They’re both homogenous
C. One is homogenous and the other is heterogeneous.
D. They are both heterogeneous.
When a substance has large or strongly extracted particles, they do not flow freely. For example, water flows very quickly compared to honey. Which property of liquids does the example illustrate?
A. Surface tension
B. viscosity
C. Amorphousness
D. Crystallinity
Volume is amount of space that matter occupies ,when matter changes from solid to liquid to gas, physical change takes place,tearing of paper is change in physical property ,honey is homogenous and salsa is heterogenous ,property of liquid which is described is viscosity.
What are physical changes?
Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.
Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.
They involve only rearrangement of atoms and are often characterized to be changes which are reversible.
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If we have only one globe with a sun, which two seasons can it be?
FALL AND WINTER
Answer:
is it fall and winter................
Explanation:
In addition to hot surface temperatures, which characteristic makes Mercury different from Earth?
A. Mercury has rings.
B. Mercury has no moon.
C. Mercury has slow revolutions.
D. Mercury has an atmosphere of carbon dioxide.
HURRY PLS ITS AN EXAM AND ITS TIMING ME
Answer:
Mercury has no moon, too close to the sun
Explanation:
Mercury has no moon which makes it different from earth.
Difference between mercury and earth.The earth has moon but mercury does not.The percentage of carbon dioxide present in atmosphere of mercury is greater than the earth.The mercury has slow revolution as compare to the earth.The mean temperature of mercury is greater than the earth.To learn more about Earth here.
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What is the mass of a 350 cm3 sample of pure silicon with a density of 2.336 g/cm3?
Answer:
The answer is
817.6 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume of silicon = 350 cm³
density = 2.336 g/cm³
It's mass is
mass = 350 × 2.336
We have the final answer as
817.6 gHope this helps you
Answer:
817.6g
Explanation:
The formula is [ m = dv ] where d = density and v = volume.
m = 2.336*350
m = 817.6
Best of Luck!
How does the electron-cloud model describe electrons? (1 point)
The anci position of an electron can be known.
An electron can be found at certain distances from the nucleus. An electron has a high probability of being in certain regions.
Each electron follows a specific path around the nucleus.
Answer:
An electron has a high probability of being in certain regions.
An ionic bond is a bond between a Cation (Metal) and an Anion (nonmetal)
True
False
Which material will heat the fastest?
Answer:
Lead
Explanation:
Lower the specific heat faster it will heat, meaning liquid will heat up slowly than any other material mentioned above. Thus lead will heat up faster
I have a mixture of rocks,
sand, and water. I pass it
through a screen. What is left
on top of the screen and what
has fallen through the screen?
The Rocks have remained on top of the screen, while the sand and water have passed through it.
Explain the four basic types of chemical reactions. Be sure to include a sample equation for each type. Describe how rate relationships and activation energy are important in chemical reactions.
A. How well do the continents fit together?L
I
What is the electron configuration for helium (He)?
A. 1s1
B. 1s2
C. 1s22s1
D. 1s22s2
Answer :
B. 1s2
this is your answer....
The electronic configuration is the system of the electron distribution in the shells of the atom. The electronic configuration for He is 1s² as it is a noble gas. Thus, option B is correct.
What is electronic configuration?The electronic configuration is the depiction of the electrons in the orbital level of the atoms around the nucleus. The electrons are distributed in the four orbitals namely, s, p, d, and f.
The orbitals have different sub-levels and can accommodate a different number of electrons. The electronic configuration of helium atom with atomic number 2 can be written as, 1s².
The s orbital can accommodate only two electrons in them and helium having only two electrons gets completely filled. Helium being the inert gas has the most stable configuration.
Therefore, 1s² is the electronic configuration of He.
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