Answer:
Science is the information gathered through study.
Explanation:
Answer:Observation of the physical world.
Explanation:
Express the following numbers in scientific notation:
1. 0.00125
2.
2,000,000,000
3. 796,000
Express the following numbers in scientific notation
How many grams are in 160 lbs ?
what method is suitable to determine whether barium is more reactive than calcium
Answer:
by looking at the number of electrons in the outermost shell of an atom determines its reactivity (the number on top of the column)
Explanation:
calcium and barium are both in column 2, since barium is located further in the column, it's more reactive
plus barium also have a larger mass than calcium
Can someone help me with this i don't understand it.
Answer:
The subscript next to the letter "C" will always tell you the number of carbon atoms.
. Identify each of the following statements as being most similar to a hypothesis, a law, or a theory. Explain your reasoning.
(a) Falling barometric pressure precedes the onset of bad weather.
(b) All life on earth has evolved from a common, primitive organism through the process of natural selection.
(c) My truck’s gas mileage has dropped significantly, probably because it’s due for a tune-up.
(a). law (states a consistently observed phenomenon, can be used for prediction); (b). theory (a widely accepted explanation of the behavior of matter); (c). hypothesis (a tentative explanation, can be investigated by experimentation)
What is law, hypothesis and theory ?A law is defined as the verified statement that will always be true for the specified conditions.A hypothesis is defined as the generalized statement that is not based upon any verification or test. Basically, a hypothesis is a guess that we have to verify through test or experimentation.A theory is defined as an in-depth information about a verified fact or observed phenomenon.Learn more about law here ;
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What would it take for Americans today to favor a greater reliance on nuclear power as a source of electricity
Answer:
yes
Explanation:
mmmm
The following properties are either physical or chemical. Which one is different from the rest based on those two categories?
Answer:
Boiling point: physical
Density: physical
Ductility: physical
Heat of combustion: chemical
Explanation:
Chemical properties can only be analyzed by putting the substance through a chemical reaction, such as combustion.
Physical properties can be analyzed without altering the substance chemically. With that in mind:
Boiling point is the physical property, density is the physical property, ductility is also a physical property but combustion of heat is a chemical property.
What is physical and chemical property?A physical property is the characteristic of a substance or compound that is observed without any change in the identity of the particular substance.
The physical properties of a substance is its colour, hardness, density, and melting as well as boiling points.
A physical property is a characteristic of matter that involves in physical change and physical changes are reversible and there is no production of any new substance.
The chemical change is the property of a substance due to which new substances are formed and it is non reversible change.
The chemical properties are flammability, toxicity, heat of combustion, coordination number, enthalpy of formation, and oxidation states.
Therefore, Boiling point is the physical property, density is the physical property, ductility is also a physical property but combustion of heat is a chemical property.
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What is wind?
(1 Point)
air that moves upward
air that moves downward
air that moves from high pressure to low pressure
air that moves from low pressure to high pressure
Answer:
air that moves from high pressure to low pressure
Comprised of protons, neutrons, and electrons.
Answer:
The atom
Explanation:
The following properties are either physical or chemical. Which one is different from the rest based on those two category? A.) Density B.) Appearance C.) Color D.) Reactivity
Answer:
A.)physical B.)physical C.)physical D.)chemical
How do we know atoms exist if we can’t see them?
Answer:
Explanation:
Because it's in your hands and there so small that a scientist would need a full scan from the body
What is the mass of a neutron?
A) 1/2,000 amu
B) 1 amu
C) 2,000 amu
D) 1/200 amu
Answer:
B) 1 amu
Explanation:
b. 239/94 Pu 4/2 He +
Answer:
im thinking its 362x
Explanation:
An acetaminophen suspension for infants contains 80 mg/0.80 mL suspension. The recommended dose is 15 mg/ kg body weight. How many mL of th is suspension should be given to an in fant weighing 14 lb? (Assume two significant figures.)
Answer:
the answer is 35mg and 58ml
Determine which physical properties are being described.
a. Copper wire is used to transfer electricity.
b. There are 19.3 grams of gold in one cubic centimeter.
c. Iron turns to liquid at 1,534.85°C. Silver is very easy to bend.
d. Fluorite is a green crystal.
Answer:
Explanation:
a. Copper wire is used to transfer electricity.
Physical property : Electrical conductivity .
b. There are 19.3 grams of gold in one cubic centimeter.
Physical property : Density
c. Iron turns to liquid at 1,534.85°C.
Physical Property : Melting point
d. Fluorite is a green crystal.
Physical property : Colour .
Answer:
Explanation:
A: Conductivity
B: Density
C: Melting point
D: Hardness
E: Color
what is symbol, molecule, electrovalent compound?
Answer:
the abbreviation form of full name is called symbol.
the smallest unit of cimpound is called molecule.
Jim went for a 3.75 hour run. How many minutes did he run?
The weight of a cup with water is 2.58 kg the weight of the empty cup is 1.5 kg considering significant figures what is weight of the water
Answer:
The correct answer is 1.1 kg
Explanation:
From the data provided:
Weight (cup + water)= 2.58 kg
Weght (cup) = 1.50 kg
Thus, we simply calculate the difference between the full cup and the empty cup to obtain the net weight of water:
Weight (water) = Weight (cup + water) - Weght (cup)
= 2.58 kg - 1.50 kg
= 1.08 kg ≅ 1.1 kg
Answer: chemistry f sucks
Explanation:
bc it's f stupid
13. A sample of copper has a volume of 14.75 cm3. The density of copper is 8.96 g/cm3. What is the mass of this sample?
Answer:
The answer is
132.16 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 copper = 14.75 cm³
Density = 8.96 g/cm³
The mass is
mass = 8.96 × 14.75
We have the final answer as
132.16 gHope this helps you
If an automobile slows from 26 m/s to 18 m/s in a period of 4.0 s, what was the average acceleration? a. %005.7 m/s2 b. 4.0 m/s2 c. 7.0 m/s2 d. %002.0 m/s2
Answer:-2.0
Explanation:
If an automobile slows from 26 m/s to 18 m/s in a period of 4.0 s, the average acceleration is 2.0
what is acceleration ?Acceleration can be defined as the vector quantity and has both magnitude and direction, it is a second derivative of position with respect to time and it is the first derivative of velocity with respect to time.
The change in the velocity of an object called as acceleration and the Velocity is a vector quantity with both magnitude and direction.
Acceleration can be a change in the direction of an object. For example, while pressing the accelerator of car makes the car go faster.
Acceleration(a)= final velocity(v) –initial velocity(u) time(t)
The velocity at the beginning was ‘u′, and the increased to velocity, ‘v′, after "t" time .
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A wind turbine is used to convert wind energy into electricity. If you want to increase the efficiency of the turbine, which of these would most likely help increase the speed of the turbine?
Answer:
Wind turbines work on a simple principle: instead of using electricity to make wind—like a fan—wind turbines use wind to make electricity. ... water) or a generator can convert this mechanical power into electricity.
Explanation:
I hope this helps!
What is the answer: 20°C to °F?
Answer:
68 degrees fahrenheit
Explanation:
how can the existence of atoms help to explain the law of define proportions .
Answer:
Atoms of same element can combine in more than one ratio to form two or more compounds. Atoms are the smallest unit of matter that can take part in a chemical reaction. The law of definite proportions states that a chemical compound always contains exactly the same proportion of elements by mass.
Explanation:
Hope this helps :)
What is the density of a 700 kg object with a volume of 649 m3? (Density: D = D = m over v.) 0.927 kg/m3 .4543 kg/m3 1.079 kg/m3 4.543 kg/m3
Answer:
.4543
Explanation:
Answer:
0.927 i just did it on edg. 2020
Explanation:
What is the TLV for sodium hydroxide? Will mark brainliest!
Answer:
you could've googled it but here.
Explanation:
The former OSHA limit for sodium hydroxide (also known as caustic soda or Iye) was 2 mg/m3 as an 8-hour TWA. OSHA proposed a 2-mg/m3 ceiling limit for sodium hydroxide, based on the ACGIH- and NIOSH-recommended limits.
Help please! List the six steps in the scientific method. Beside them list the nine components of a lab report.
Which of the following statements describe P-waves? Select the two correct answers.
A. They are the first waves detected after an earthquake.
B. They are the most destructive earthquake waves.
C. They alternately compress and pull apart the partides in matter.
D. They can only travel through the solid rock inside Earth.
Answer: C- they alternately compress and pull apart the particles in matter
A -they ate the first waves detected after and earthquake
Explanation:
Answer:
A&C
Explanation:
APEEXX
A silver coin with a mass of 14.1g has a density of 10.5 grams
What is the volume of the coin in cm??
cm
Answer:
1.34 cubic centimeter
Explanation:
v = m/d
A mixture is made by combining 1.17 lb of salt and 3.54lb of water.What is the percentage of salt (by mass) in this mixture?
Answer:
The percentage of salt in the mixture 24.84%
Explanation:
In this problem we are required to solve for the percentage of salt in the mixture of salt and water
Step one :
We can proceed by first solving for the total mass of the mixture
Which is given as
mass of mixture =mass of salt +mass of water
Mass of mixture = 1.17+3.54
Mass of mixture = 4.71 lb
Step two :
Now let us calculate the percentage of salt present in the mixture which is
=(mass of salt/mass of mixture) *100
=(1.17/4.71)*100
=0.248*100
=24.84%
5(3x)-7y2=?,when x=3 and y =2
Answer:
17
Explanation:
We are given the equation:
[tex]5(3x)- 7y^2[/tex]
and asked to solve when x=3 and y=2. Therefore, we must plug 3 in for x and 2 in for y.
[tex]5(3(3))-7(2)^2[/tex]
Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Addition and Subtraction.
Solve the exponent first.
⇒ (2)²= 2*2=4
[tex]5(3(3))-7(4)[/tex]
Multiply 3 and 3.
⇒3*3=9
[tex]5(9)-7(4)[/tex]
Multiply 5 and 9.
⇒5*9=45
[tex]45-7(4)[/tex]
Multiply 7 and 4.
⇒ 7*4=28
[tex]45-28[/tex]
Subtract 28 from 45.
[tex]17[/tex]
5(3x)-7y² when evaluated for x=3 and y=2 is 17