Answer:
14,250 years old.
Explanation:
First, multiply the two lifetimes. - 11,400.
Then, divide 5,700 in half for the 0.5 lifetime. - 2,850.
Lastly, add them all up. - 11,400 + 2,850 = 14,250 years old.
sorry if incorrect <3
thats what i understood XD
What part of the sun do we see from earth?
Answer:
photosphere
Explanation:
photosphere
There are 3 main layers of the Sun that we can see. They are the photosphere, the chromosphere and the corona. Together they make up the "atmosphere" of the Sun. The part of the Sun that glows (and that we see with the naked eye) is called the photosphere
Answer:
There are 3 main layers of the Sun that we can see. They are the photosphere, the chromosphere and the corona. Together they make up the "atmosphere" of the Sun. The part of the Sun that glows (and that we see with the naked eye) is called the photosphere.
Explanation:
Yes, that's right a layer of the sun is called Corona
Coincidence, I think not
Identify the error in the following statement:
A scientific theory is well-substantiated, fact-based, and unchangeable.
O A. Scientific theories can change as scientists continue to test ideas and gather evidence.
Please help me on this! I’ll mark you the brainliest
B. The statement is describing a hypothesis rather than a scientific theory.
O
C. A scientific theory is not well-substantiated.
D. A scientific theory is not fact-based.
Velocity and speed are both measurements of how fast something is moving however velocity is different from speed because
A) velocity and speed are the same thing
B) velocity is usually faster than speed
C) The velocity of an object also tells us the direction something is moving
D) velocity is how fast something is changing its speed
Answer:
C
Explanation:
Velocity is a vector quantity I.e it has magnitude and direction
Speed on the other hand is a scalar quantity I.e it has only magnitude
An atom has 17 protons, 18 neutrons and 17 electrons. What is the charge of its electron cloud?
Answer:
Neutral. There are equal amounts of protons or positively charged parts and electrons or negatively charged parts. The neutrons have no net charge which means this atom of chlorine is neutral.
Explanation:
Why would you expect soap to taste bitter
Answer:
It is basic
Explanation:
Soaps are always basic, and basic compounds have a bitter taste.
why must we include units with a measurement?
Answer:
Units are used to show if a certain calculation is on track.
Explanation:
For example, 5.1 inches is way shorter than 5.9 inches.
Looking at the periodic table, which of theses elements has the smallest atomic radius (A. Sodium B. potasaium C. Hydrogen D. LithIum)
Answer:
The answer is C. Hydrogen
Explanation:
It has a radius of 53 pm calculated.
Explain why mixtures can be separated by physical methods, such as sieving and distillation.
bhag bhag aaya sheer
Answer:
i dont undersstand lol
Explanation:
Explanation:
bhag bhag aaya sheer
..........
9.Magnetization of iron is a physical change.
A true
B false
Answer:
This is true.
Explanation:
Magnetization of iron is a physical change and not a chemical change as there is no change of state, no change of temperature, no smell and no evolution of gas.
Water, air, buildings, food, and everything visible and invisible have mass and takes up space. What is the word used to describe anything that has mass and takes up space?
Answer:
Matter
hope this helps
Answer:
matter
Explanation:
Did the test
How many kilograms does 300 cg of cheese weigh?
Answer:
300 centigrams of cheese would weigh 0.003 kilograms.
Explanation:
7. Compared with our'Sun, the star Belelgeuse is
smaller, hotter, and less luminous
smaller, cooler, and more luminous
larger, hotter, and less lumulous
larger, cooler, and more luminous
Answer:
Larger, cooler, and more luminous.
Betelgeuse is red in color, and that means that the surface of it is cooler than the sun (bluish white is hottest, and red is lowest). It is also common knowledge that it is larger, so the correct option would be D. Hope this helped :)
Muscles, bones, skin, and
organs are all mainly made up of
(PICK
ONE) -> Fats Fiber Minerals | Protein.
Answer:
The answer is Protein.
In which layer of Earth's interior is the inferred temperature
6,000°C?
Answer:
outer core
Explanation:
the outer core is estimeted to be 6,000 C
Which of the following substances cannot be separated?
O homogeneous mixture
heterogeneous mixture
element
O compound
Answer: Elements.
Explanation: Homogeneous and heterogeneous is just if a mixture is uniform or not. Mixtures and always be separated. Compounds are elements that combined which can be broken down again. So I say the logical answer is an element since it's pure and cannot be broken down into other elements or more of it's self.
Help fast. If 1500 joules of energy is used to heat 50g of water with a temperature of 20°C, then what will the final temperature be? (Water’s specific heat is 4.18 j/g°c)
Answer:
27°C
Explanation:
q = 1500 J
m = 50g
c = 4.18 J/g°C
q = m·c·ΔT
ΔT = [tex]\frac{1500J}{50g*4.18\frac{J}{gC} } = 7C[/tex]
ΔT = final temperature - initial temperature
Final temp = 20 + 7 = 27°C
what state of matter of a substance depends on how the particles in that substance
Answer:
Solids is the answer hope this helps
wave has a frequency of 5hz and a wavelength of 25 m/s.
what is the speed of the wave
Answer:
125m/s
Explanation:
speed= wavelength×frequency
= 25×5
=125
The speed of the wave will be 125 m/s.
What is speed?The magnitude of an object's rate of change of position with time, or the magnitude of change of position for each unit of time, is its speed; it can be considered as a scalar quantity.
Speed = wavelength × frequency
Calculation of speed is shown below:
It is given that wavelength = 25 m/s, frequency = 5 hz.
Speed can be calculated by using the formula:
Speed = wavelength × frequency
speed = 25m/s × 5 hz
speed = 125 m/s
To know more about speed.
https://brainly.com/question/7359669.
#SPJ2
which three elements have the most similar chemical properties
Answer:
K, Rb and Cs
Explanation:
Answer:
krypton, bromine, and argon
What are some uses we might have for standing waves?
What is the difference between a physical and a chemical property? (please hurry)
Answer:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. ... A chemical property describes the ability of a substance to undergo a specific chemical change.
Explanation:
An element has a shiny metallic appearance and is both ductile and malleable. In which section of the diagram would the element most likely be found?
A.
1.
B.
2.
C.
3
D.
4
Answer:
Section 2 on the diagram (Option B)
Explanation:
These metals can be shiny, ductile, malleable, and are good conductors of heat and electricity.
Heat capacity of a material is dependent upon the material's mass.
True or false?
Hello
Answer:
True.This quantity is known as the specific heat capacity (or simply, the specific heat), which is the heat capacity per unit mass of a material. Experiments show that the transferred heat depends on three factors:
(1) The change in temperature,
(2) the mass of the system.
(3) the substance and phase of the substance.
How many inches/second are in
1.73 meters/minute?
A. 68.1 in./s
B. 0.0288 in./s
C. 1.14 in./s
D. 2.64 in./s
Answer:
1.73 meters / minute = 1.14 inches / second
Explanation:
The number of inches present in 1.73 meters/minutes is equal to 1.14 inches/seconds.
What is conversion factor?Conversion factor is a quantity which is get multiplied or divided with an any other given quantity to convert the given quantity into any other quantity.
Given quantity = 1.73 m/min
We know that, 1 meter = 39.37 inches
1.73 m/min = 1.73 × 39.37 = 68.11 inches/min
Also we know that, 1 min = 60 min to convert the above quantity into sec we should divide that by 60 as:
68.11 inches/min = 68.11 / 60 = 1.135 inches/sec (1.14)
Hence the required quantity is 1.14 in./s.
To know more about conversion factor, visit the below link:
https://brainly.com/question/97386
How many electrons are shared between one nitrogen
atom and one carbon atom
Where is chemistry used?
A. In all areas of life
B. Only in the food industry
C. Mostly in medicine
D. Mostly in manufacturing
Answer:
A
Explanation:
chemistry is used in all areas of life
Answer: A
Explanation:
just got it right
If 5,800 j of energy are applied to a 15.2 kg piece of lead, by how much does the temp change if the specific heat of lead is 0.128
Answer:
The answer will be 2.98K
Explanation:
Using the formula:
Q = mc∆T
Q= 5,800 (heat in joules)
m= convert 15.2kg to g which is 15200g (mass in grams)
c= 0.128 J/g °c (Specific heat capacity)
∆T= what we need to find (temperature change)
5800J = 15200g x 0.128 x ∆T
= 2.98K
true or false forming a hypothesis is the first strip of the scientific method
Answer:
True (probably)
Explanation:
I think it's true since creating hypothesis is the start of almost every scientific activities that we usually know. Please correct me if I'm wrong.
How is particle motion related to thermal equilibrium?
Answer:
With billions of moving particles colliding into each other, an area of high energy will slowly transfer across the material until thermal equilibrium is reached (the temperature is the same across the material).