Answer:
I'd say telescope
Explanation:
A microscope is used to observe particles that cannot be seen with the naked eye
Answer:
its fiber optics. the other answers don't make sense.
Explanation:
Calculate the speed.
1. If a car travels 800m in 30 seconds how fast is it going?
Answer:
s = 26.7 m/s
Explanation:
Given data:
Distance travel = 800 m
Time taken = 30 sec
Speed of car = ?
Solution:
Formula:
S = d/t
s = speed
d = distance
t = time
by putting values.
s = 800 m/ 30 s
s = 26.7 m/s
What is the MOST important factor in the changing of the seasons?
A. the earth’s tilt toward the sun
B. the heating and cooling of land
C. the Earth’s distance from the sun
D. the amount of rainfall received
Answer:
A. the earth’s tilt toward the sun
Explanation:
The most important factor in the changing of the seasons on the earth is the earth's tilt towards the sun.
This causes the differences in the amount of insolation which is incident on the earth surface. Throughout the year, as the earth continues to spin, it receives different amount of solar radiation all year round.
The sun is always overhead around the equator. Such regions of the world receives direct insolation and are mostly constrained to a wet and dry season.
Areas above the equator have the sun at an angle. The diffused sunlight present distinct seasons all year round.
If an object has zero velocity, will the object be in motion? Why or why not?
Answer:
The object will not be in motion
Explanation:
An object at rest has zero velocity - and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force. ... Objects resist changes in their velocity.
Answer:
Yes it can be in motion
Explanation:
Even though it stopped, i.e the velocity is zero, the acceleration would be the acceleration due to gravity, 9.8 m/s. Acceleration can only be calculated over a period of time. This means, even if the motion of the body changes after infinitesimally small period of time, the object will have an acceleration.
Mitochondria ideas ......... help it due in 2 mins
Answer:
Mitochondria are the structures within cells that produce energy. The mitochondria modulate cell metabolism, reactive oxygen species (ROS) genesis, cell apoptosis, and the universal second messenger, calcium. An example of mitochondria is what regulates metabolism in human cells.
Explanation:
How many atoms will there be in 5.00 g of gold. (Use ^ to show the exponent in scientific notation. For example, 4 X 1011 should be written 4 X 10^11. Include the unit "atoms" in your answer.
Answer:
1.53x10^22 atoms of Au
Explanation:
To find the atoms of gold we need first, to convert the mass of gold to moles using molar mass of gold (196.97g/mol). Then, these moles must be converted to number of atoms based on definition of moles (1 mole = 6.022x10²³ atoms).
Moles Au:
5.00g Au * (1mol / 196.97g) = 0.0254 moles of Au
Atoms of Au:
0.0254 moles * (6.022x10²³ atoms / 1 mole) =
1.53x10^22 atoms of AuWill mark brainliest
Which statement describes a compound machine?
It is made up of more than one simple machine.
It makes work more difficult.
It has movement in only one direction.
It can only be acted on by one force.
Answer:
It is made up of more than one simple machine.
Explanation:
i did test and got it right
Answer:
It is made up of more than one machine, the reason this is right is because when you think of compound you think of more than one right so yeah that's how I got my answer.
Explanation:
initial consentretion
What is initial concentration?
High initial concentration of spilled oil has a negative effect on the biotransformation process that causes a significant lag phase of about 2–4 weeks. Even after biostimulation, at least a week is needed for microorganisms to adapt and the entire bioremediation process may require months and even years to be completed (Atlas, 1995; Zahed et al., 2010a). The rates of uptake and mineralization of many organic compounds by a microbial population depend on the concentration of the compound (Olivera et al., 1997; Rahman et al., 2002).
Which statement correctly describes what atoms and molecules are made
of?
о
A. Atoms are made of molecules, and molecules are made of
protons, neutrons, and electrons.
B. Molecules are made of protons and neutrons, and atoms are
made of electrons and protons.
C. Atoms are made of protons and electrons, and molecules are
made of neutrons and electrons.
D. Molecules are made of atoms, and atoms are made of protons,
neutrons, and electrons.
Answer:
D
Explanation:
Answer:D. Molecules are made of atoms, and atoms are made of protons,neutrons, and electrons.
Explanation:
How does your body generate heat
Answer: Thermogenesis:Your body's muscles, organs, and brain produce heat in a variety of ways. For example, muscles can produce heat by shivering. Hormonal thermogenesis: Your thyroid gland releases hormones to increase your metabolism. This increases the energy your body creates and the amount of heat it produces.
Explanation:
Genetic material (DNA) can be found in:
O animal cells only.
O both plant and animal cells.
O neither plant nor animal cells.
O plant cells only.
Answer:
Genetics is a branch of biology concerned with the study of genes, genetic variation, and heredity in organisms. Though heredity had been observed for millennia, Gregor Mendel, a scientist and Augustinian friar working in the 19th century, was the first to study genetics scientifically.
hydrated CoCl2 is a deep purple color. After being heated for a long time, it turns into its anhydrous form, which is sky blue. Is this a chemical or physical change
Answer:
Physical change
Explanation:
It is a physical change because a physical change involves alteration in physical properties or appearance in color, sizes e.t.c but no new substances is formed. From the question, CoCl2 undergo a physical change because it's physical property which is color changed , its composition is not altered or no new substances is formed during the reaction.
(03.07 LC)
What type of organic compound contains a nitrogen atom bonded to one, two, or three carbons
Answer:
Amines
Explanation:
The organic compound which contains nitrogen atom bonded to one, two or three carbons are the amines.
Amines are known to show an appreciable level of basicity. They are often regarded as the derivatives of ammonia that where one or two or three hydrogen atoms have been replaced by alkyl or aryl groups. Amines are classified into primary, secondary and tertiary on the basis of the number of substituted hydrogen atoms.what kind of reaction is 2C2H6 + 7O2 = 4CO2 + 6H2O
Answer:
A combustion reaction
Explanation:
C
organic compound(contains carbon) reacts with oxygen to give out carbon dioxide and water is a complete combustion.
Group 17 is called the halogen family, and the group to its right is called the noble gases. How are these elements alike and how are they different?
Explanation:
The halogen family and noble gases are similar in just one particular way, they are groups of non-metals. All members of these two groups are categorized as non-metals.
Here are some of the differences between them;
Halogens have 7 electrons in their outermost shell whereas noble gases have 8 electrons in theirs. Halogens are highly reactive elements, noble gases are non-reactive. Halogens are made up of electronegative elements where as noble gases are neither electropositive nor electronegative.how are dogs born? (10 points)
Answer:
Most puppies are born head first but some come tail first. Puppies are born inside a thin sac, which the mother will remove, enabling them to breathe. After each puppy, your dog should pass an afterbirth (placenta), which they often eat.
Explanation:
how much of the solar energy is absorbed by a surface of snow? How much solar energy does a dark forest absorb?
The density of water is 1 g/cm3(1 gram per cubic centimeter); using this fact as a reference & Table c , how would you determine if an object sinks or float
Answer:
Explanation:
Any densities less than 1g/cm3 will float, while objects with densities over 1g/cm3 will sink.
How many grams of Gold are in 6.7moles of gold?
URGENT!
Answer:
1319.669 g OR 1.3*10^3 g
Explanation:
[tex]6.7*\frac{196.97}{1} =1319.699[/tex]
How many atoms in:
1. PbF3 -
2. Pb2O3 -
Answer:
The correct answer is 1) 257 and 2) 135
Explanation:
List the subtances in the bar chart in order of increasing melting point (lowest melting point first)
Q4: Ethanol has a boiling point of 78°C.Water has a boiling point of 100°C.
Describe how distillation is used to separate a mixture of ethanol and water.
Explanation:
A mixture of ethanol and water can easily be separated by distillation. Distillation separation technique utilizes the differences in boiling point of a mixture of two liquids.
Since water has a higher boiling point compared to alcohol, it makes it easier for the process of distillation to occur
In the distillation flask, the mixture is heated to a set temperature. At the boiling point of alcohol, the first fraction of this component begins to rise in the mixture and it is collected over the condenser. The remaining fraction will then be water.1.Write the balanced chemical equation for the complete combustion of C5H 12 in excess oxygen.
2. Write the balanced chemical equation for the incomplete combustion of C5H 12 in a limited supply of oxygen.
Answer:
C5H12 + 8 O2 ---> 5 CO2 + 6 H2O
Explanation:
any combustion reaction reacts with oxygen to form carbon dioxide and water.
So you would write C5H12 + O2 ----> CO2 + H2O
(oxygen is a diatomic therefore it gets a 2 subscript)
next you just have to balance this equation (Combustions are the WORSE to balance so here you go!)
C5H12 + 8 O2 ---> 5 CO2 + 6 H2O
In which of the following areas will soil erosion be greatest?
Answer:
Erosion happens at the tops of mountains and under the soil. Water and chemicals get into the rocks and break them up through those mechanical and chemical forces. Erosion in one area can actually build up lower areas. Think about a mountain range and a river.
A weather balloon is inflated to a volume of 2200 L or 2.2 x 103 L with 374 g of helium. What is the density of helium in g/L
Answer:
The answer is 0.17 g/LExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{374}{2200} = \frac{17}{100} \\ [/tex]
We have the final answer as
0.17 g/LHope this helps you
Answer:
0.17 I am 100% sure :)
how many molecules are in 6.9 moles of CO2?
Some species can reproduce sexually or asexually.
In which two situations is sexual reproduction advantageous?
A. When no individuals of the same species are available for mating
OB. When many individuals of the same species are available for
mating
C. When the individuals live in a stable environment in which they
thrive
I D. When the individuals live in an environment that suddenly
changes
Answer:
c
Explanation:
Answer:
C. When the individuals live in a stable environment in which they
thrive
D. When the individuals live in an environment that suddenly
changes
Explanation:
pls mark as brainliest :)
Why Basalt and gabbro are denser than granite and
obsidian?
Answer:
What do you think causes some rock types to have higher densities than others? (Assuming there are no air pockets in the rock, the types of minerals will determine the density. Granite contains lots of quartz and feldspar - both fairly light minerals, whereas basalt and gabbro are made of heavier minerals.)
Explanation:
Given the following isotopes of strontium, calculate the average atomic mass.
43.65% strontium at a mass of 87.05 amu, and 48.24% of strontium at a mass of 87.93 amu and 8.11% of strontium at a mass of 87.50 amus.
Answer:
87.5198
Explanation:
(43.65 * 87.05) + (48.25 * 87.93) + (8.11 * 87.50) = 8751.98
8751.98 / 100 = 87.5198
Some properties of matter depend on how much matter there is. Put an X next to all of the statements you think are true about properties of matter.
Answer:
Its B and D :)
Explanation:
I saw the answer key.
the sum of the atomic mass values of the atoms in a chemical formula is known as ____________.
Answer:
I believe this is called the 'molar mass'
