How is energy involved in physical change??
Answers
Answer:during phase chages
Step-by-step explanation:
During phase changes, energy changes are usually involved. For example, when solid dry ice vaporizes (physical change), carbon dioxide molecules absorb energy. When liquid water becomes ice, energy is released. Remember that all chemical reactions involve a change in the bonds of the reactants
Related Questions
Nina is selling three types of energy bars at a market stall.
She bought 80 Enerbars at 40p per bar and 180 Grainbars at 30p per bar from her normal supplier.
She was also given 40 Amazebars as a promotion from a new supplier.
Nina sells the bars for £2.25 and manages to sell all the Enerbars and Grainbars but only some Amazebars.
She makes a profit of £553.
How many Amazebars did she sell?
Answers
Answer:
She sold 24 Amazebars.
Step-by-step explanation:
Cost:
80 x 0.40 = 32
180x 0.30 = 54
40 x 0 = 0
Total = 86
Income
80 x 2.25 = 180
180 x 2.25 = 405
X x 2.25 = 2.25x
Total = 585 + 2.25x
How many did she sell:
553 = 585 - 86 + 2.25x
553 = 499 + 2.25x
553 - 499 = 2.25x
54 = 2.25x
54/2.25 = x
24 = x
Two positive improper fractions are multiplied.Is the product sometimes,always,or never less than 1?Explain.
Someone help me please and thank you:)
Answers
Answer:
never
Step-by-step explanation:
Positive fractions will be more then one.
Pleaseee what’s the answer?
Answers
:))))))
Answer: 1 1/6
Step-by-step explanation:
Divide 7 by 6 as you normal divide numbers.
Use the method that my 5th grade teacher called "Around the World" to help you solve it.
Look at the image below, and I hope that helps! :)
[WILL MARK BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!]
The state of colorado is 4 cm long and 3 cm wide on a map. A cartographer wants to use a scale factor of 2.5 to enlarge the map. What is the area of the enlarged map?
A:12 square cm
B:30 square cm
C:35 square cm
D:75 square cm
Answers
Answer:
D. 75 cm²
Step-by-step explanation:
We are asked to find the area of a scaled map.
What is a Scale Factor?A scale factor is a change in the size, or ratio of a shape, or object.
The value of the scale factor represents how much larger the shape or object will become.
First, let's identify what is given to us.
Given:
The map of Colorado is 4 cm long and 3 cm wide.We have to enlarge the map with a scale factor of 2.5.We should begin by enlarging the map with the given scale factor. In order to find the dimensions of the scaled map, we should multiply the given dimensions of the original map by the scale factor.
Multiply:
\(4 \times 2.5 = 10 \ cm\)
\(3 \times 2.5 = 7.5 \ cm\)
Next, we should find the area of the scaled map by multiply the dimensions together.
\(A = L \times W\)
Multiply:
\(A = 10 \times 7.5\)
\(A = 75 \ cm^{2}\)
The area of the scaled map is D. 75 cm².
please help!
Try to solve the equation below.
2x^2+18=10
Explain why this equation has no real number solutions.
Answers
Answer:
Step-by-step explanation:
The discriminant of this equation, i.e, D=\(b^{2}-4ac\) is less than 0:
D= 0-(4*2*18) --> which is clearly negative
When D is less than 0, the equation has no real number solutions.
Therefore, \(2x^{2}+18=0\) has no real roots
Answer:
Step-by-step explanation:
0 has no roots so thats one, and im just trying to complete a challenge so sorry if im wrong :( but make other person brainliest they did good job :)
What is this in simplest form
Answers
Answer:
this is the simplest form
Step-by-step explanation:
since there is a variable in the fraction, you can't simplify it any further until we know that term.
Answer:
-7y/2
Step-by-step explanation:
-7y/2 cannot be simplified any further as there are no common factors of -7y and 2
Directions: Answer the following questions after reading Act I, scene 5 of The Diary of Anne Frank.
( no randoms please
1. How is this scene the happiest they have been since going into hiding?
2. Why does Margot not want to blow out the candles? Why does Mr. Frank say they need to.
3. Explain Peter’s prank on Mr. Dussel.
4. How does everyone react to Mr. Dussel’s cat allergy?
5. What happens that makes the mood change?
6. How was this scene the most scared they have been since going into hiding?
7. Describe juxtaposition and explain how this scene is an example of juxtaposition.
8. Describe how each person reacts in the situation when they are scared.
9. List the gifts that Anne gave to each person for Hanukkah. Then show how these gifts represent Anne maturing by saying what the thought or meaning behind each gift is.
Gift Thought/meaning behind the gift
1.
2.
3.
4.
5.
6.
7.
8.
Answers
What is The Diary of Anne Frank?: It's the first, and sometimes only, exposure many people have to the history of the Holocaust.
1. How is this scene the happiest they have been since going into hiding?
In my opinion, this scene is the happiest they have been since going into hiding because the holocaust was very brutal because many individuals got executed and frightened throughout the Holocaust, and opening the gifts was a good way to temporarily forget about their problems.
2. Why does Margot not want to blow out the candles? Why does Mr. Frank say they need to?
Margot does not want to blow out the candles because they are supposed to be left to burn themselves out. Mr. Frank tells her God will understand that they need to conserve their Candles.
3. Explain Peter's prank on Mr. Dussel.
Peter was coming from his room as he was holding something in his coat which turned out to be a towel, but Mr. Dussel thought it was a cat. In the end, he was allergic to his clothes.
4. How does everyone react to Mr. Dussel's cat allergy?
Some seem to laugh at Mr. Dussel's cat allergy, but Mr. Van Dans wants to throw out Peter's cat for always eating their food. Peter said if Mr. Van Daans throws out the cat he will go out with it, but it didn't happen.
5. What happens that makes the mood change?
Something crashes below and they all freeze in horror. Peter tries to reach the lamp, but he can't so he gets up on a chair to try again but he ends up losing his balance and falling and then more steps can be heard below.
6. How was this scene the most scared
they have been since going into hiding?
Because they thought it was the Green Police or the Gestapo that have discovered their hiding place and had come to get them.
7. Describe juxtaposition and explain how this scene is an example of juxtaposition.
A writer can make readers sense of "goodness" in a particular character by placing him or her side-by-side with a character that is
predominantly "evil." In my opinion, this scene is an example of juxtaposition when Peter and Mr.
Van Dans had an argument about the cat, making Peter seem like a positive character while making Mr. Van Dans look like a negative character.
8. Describe how each person reacts in the situation when they are scared.
Mrs. Van Dans was panicking and saying to give the Green Police money
Anne was more concerned for her father because he went to check what happened below while her mother was trying to calmly put her in a state of relief. At some point, Anne asked who is going to look for Mr. Frank and Peter offered to show that he wasn't scared of any danger but Mr.
Dussel pushed Peter away in an angry tone. Mr.
Van Dans was as well calm and seemed to be more focused on what could happen next.
(I hope I did get every one right )
9. List the gifts that Anne gave to each person for Hanukkah. Then show how these gifts represent Anne maturing by saying what the thought or meaning behind each gift is.
1. Margot Frank: A crossword puzzle book / She never loses her temper.
2. Mrs. Van Dans: Hair shampoo / Mrs. Van Dans likes her hair (it doesn't seem to say in this scene, so I don't exactly know)
3. Mr. Van Dans: 2 cigarettes / Mr. Van Dans enjoys smoking (same as above)
4. Mrs. Frank: Ten hours of Anne doing what she says / Anne didn't get the time to repay her (that's what it made me believe)
5. Mr. Frank: A scarf / He found it in the first
scene
6. Mushi: A ball of paper with a string attached to it / For the cat to play with and stay entertained.
7. Peter: a safety razor / Peter was growing a mustache.
8. Mr. Dussel: earplugs / So he won't hear Anne making noise at night
Anne is maturing way faster because of the problems of what happens outside of their hiding as well. Every meaning of the gifts shows that Anne can see every little detail about people which not many kids can do.
l am sorry if l'm late, I had to do some research and listen to the audiobook of the specific scene.
I hope it was helpful! :]
An elevator goes up 7 floors and then down 4 floors. What integer represents the change in the floor level?
Answers
7-4=3
please help me i will give brainliest to first person to anwser.
Answers
First we start with the formula for cylinders v=(pi)r(squared)h filled in Thats v=(3.14)(8 squared) (8) which brings us to the answer 1607.68 but you must round to the nearest tenth aka 1607.7
Answer:
The first option, V ≈ 1607.7 in²
Step-by-step explanation:
Find the volume of the given cylinder.
\(\begin{center}\framebox{\parbox{4cm}{\textbf{Volume of a Cylinder:}\\[2ex]The volume of a cylinder with radius $r$ and height $h$ is given by the formula:\\[2ex]\center{$V = \pi r^2 h$} \\ \\}}\end{center}\)
Given:
r = 8 in
h = 8 in
π = 3.14
Find:
V = ?? in³
\(\hrulefill\)
Now solving,
Substitute the given values into the formula:
=> V = (3.14)(8)²(8)
Using a calculator to simplify:
=> V = 1607.68 in²
Rounded to the nearest tenth:
∴ V ≈ 1607.7 in²
Thus, the first option is correct.
Find the answer and simplify.
What is (4/9)^2?
What is 4 over 9(as a fraction) to the power of 2?
Answers
Answer:
16/81
Step-by-step explanation:
To square a fraction, you would have to square both the denominator and the numerator. You would have to do 4x4/9x9, which is 16/81.
Answer:
The answer is 16/81
Step-by-step explanation:
To evaluate this equation first find a understanding of what needs to be solved.
Here we see that we need to solve 4/9th to the power of 2.
to solve this we find what 4 to the power of 2 is and what 9 to the power of 2 is.
To use the power of 2 you multiply the number to itself that many times so if its 5 to the power of 3 you would right it as 5 x 5 x 5.
In this case we need to do 4 x 4 and 9 x 9.
4 x 4 = 16
9 x 9 = 81
The 4 x 4 solution remains as the numerator
The 9 x 9 solution remains as the denominator
After solving we get 16/81, due to the 81 not being even and 16 not being a multiple we can not simplify this fraction anymore.
The correct answer is 16/81 have a great day :)
This is the graph of f(x) = x+A/x+B. The grid lines in the graph are one unit apart. What is the value of A/B
Answers
The value of A/B is given as follows:
A/B = -2.
What are the asymptotes of a function f(x)?The vertical asymptotes are the values of x which are outside the domain, which in a fraction are the zeroes of the denominator.The horizontal asymptote is the value of f(x) as x goes to infinity, as long as this value is different of infinity.From the graph, the function has a vertical asymptote at x = 1, hence the value of B is given as follows:
B = -1 -> as x + B = 0 -> x = -B = -1.
When x = 0, y = -2, hence the value of A is obtained as follows:
A/-1 = -2
A = 2.
Then the division is given as follows:
A/B = 2/-1 = -2.
More can be learned about the asymptotes of a function at https://brainly.com/question/1851758
#SPJ1
Which layer of the earth is responsible for continental and oceanic plate movement?
(I know this is in the wrong category, I could not find the right one.)
A. crust
B. mantle
C. inner core
D. outer core
Answers
Answer: B. Mantle
Step-by-step explanation:
I just couldn't pass up answering this question. I think the earth is very interesting.
The Earth's mantle is a thick layer of hot, flowing rock that lies beneath the crust. Convection currents within the mantle are responsible for the movement of the Earth's tectonic plates, which make up the continents and the ocean floor. As the mantle convects, it drags the plates along with it, causing them to move and interact with each other at their boundaries. This movement is responsible for many geological phenomena, including earthquakes, volcanoes, and the formation of mountain ranges.
Does the point (3, 1) lie on the line? What does this mean in terms of the science experiment?
Answers
Answer:
No, the point (3, 1) does not lie on the graph. This means a weight of 3 kilograms will not stretch the spring 1 inch.
Step-by-step explanation:
what type of function is y=(x+1)^2-2
Answers
Step-by-step explanation:
Answer in the picture algebraic equation
I NEED HELP PZZ ASAP GOD BLESS U
Answers
Hope this helps!
Please solve QUICKLY
Answers
Answer:
C
Step-by-step explanation:
It isn't B because the point does not start at 600 and it is not A because it shows the entire decrease of the mass in one millennium. The correct answer is c.
Directions: Simplify each term by factoring.
1. 9rs
2. 14xy
3. 5x2
4. 32x2
5. 20x2
6. 30x2
7. 5x3
8. 25y3
9. 9xy
10. 12x4
Answers
can someone help me please
Answers
PLEASE HELP THANK YOU SO MUCH!!! :)
(solve, show work) Jennifer earns $1,920 in interest after making a deposit 6 months ago at a rate of 12.5%. What was the initial deposit 6 months ago? PLS answer this seriously its really important tysm!
Answers
Answer:
P = $1807.058
Step-by-step explanation:
Given
A=$1, 920
R=12.5% =12.5/100
T= 6month = 6/12 .... to change to year
Required
p=?
Solution
A= I + P ......... I= PRT
A = PRT + P
A= P(RT+1)
$1920 = P( 12.5/100 ( 6/12) + 1 )
$1920= P(1.0625)
P = $ 1920 / 1.0625
P = $1807.058
We can use the simple interest formula to solve this problem. The formula is:
I = P*r*t
where I is the interest earned, P is the principal (initial deposit), r is the annual interest rate, and t is the time in years.
First, we need to convert the annual interest rate of 12.5% to a monthly rate. We can do this by dividing the annual rate by 12 (the number of months in a year):
r = 12.5%/12 = 0.01041667
Next, we need to convert the time of 6 months to a fraction of a year. We can do this by dividing 6 by 12:
t = 6/12 = 0.5
Now we can plug in the given values and solve for P:
I = P*r*t
$1,920 = P*0.01041667*0.5
$1,920 = P*0.00520833
P = $1,920/0.00520833
P = $368,640
Therefore, the initial deposit 6 months ago was $368,640.
Which of q = -2,q = 2,q = 14, or q = -14 is the solution for 8 = q - 6 Use substitution to determine the answer. Plot the solution on a number line.
Answers
Answer:
q = 14
Step-by-step explanation:
q-6=8
+6 +6
The 6 cancels out.
q = 14 (just plot 14 on the number line)
Answer:
q = 14
Step-by-step explanation:
solve the formula for calculating the perimeter of a parallelogram with sides b and c for c p = 2b+2c
Answers
Answer:
Proved;
See Explanation
Step-by-step explanation:
Given:
Shape: Parallelogram
Sides: b and c
Required:
Show that P = 2b + 2c
Let P represents the perimeter of the parallelogram.
There are 4 sides in a parallelogram where 2 sides are opposite and parallel
Given that two of the side of the parallelogram is b and c; this implies that the next two sides are also b and c.
This means that the sides of the parallogram are b,c,b,c
The perimeter of any shape is calculated by adding the lengths of the shape;
This means that
\(P = b + c + b + c\)
Collect like terms
\(P = b + b + c + c\)
\(P = 2b + 2c\) ------ Proved
Use the Midpoint Rule with \(n=5\) to estimate the volume obtained by rotating about the y-axis the region under the curve \(y=\sqrt{1+x^3}\), \(0\leq x\leq 1\).
Answers
To estimate the volume using the Midpoint Rule with \(\displaystyle n=5\), we need to divide the interval \(\displaystyle 0\leq x\leq 1\) into \(\displaystyle n\) subintervals of equal width. Since \(\displaystyle n=5\), each subinterval will have a width of \(\displaystyle \Delta x=\frac{1-0}{5}=\frac{1}{5}\).
Now, let's calculate the volume using the Midpoint Rule. The formula for the volume obtained by rotating about the y-axis is:
\(\displaystyle V\approx 2\pi \sum _{i=1}^{n}y_{i}\Delta x\)
where \(\displaystyle y_{i}\) represents the value of the function \(\displaystyle y=\sqrt{1+x^{3}}\) evaluated at the midpoint of each subinterval.
First, let's find the midpoints of the subintervals. Since the width of each subinterval is \(\displaystyle \Delta x=\frac{1}{5}\), the midpoint of the \(\displaystyle i\)-th subinterval is given by:
\(\displaystyle x_{i}=\frac{\Delta x}{2}+\left( i-\frac{1}{2}\right) \Delta x=\frac{1}{10}+\left( i-\frac{1}{2}\right) \frac{1}{5}\)
Substituting \(\displaystyle x_{i}\) into the function \(\displaystyle y=\sqrt{1+x^{3}}\), we obtain:
\(\displaystyle y_{i}=\sqrt{1+\left( \frac{1}{10}+\left( i-\frac{1}{2}\right) \frac{1}{5}\right) ^{3}}\)
Now, we can calculate the approximate volume using the Midpoint Rule:
\(\displaystyle V\approx 2\pi \sum _{i=1}^{5}y_{i}\Delta x\)
Substituting the values of \(\displaystyle y_{i}\) and \(\displaystyle \Delta x\) into the formula, we can evaluate the sum and compute the estimated volume.
\(\huge{\mathfrak{\colorbox{black}{\textcolor{lime}{I\:hope\:this\:helps\:!\:\:}}}}\)
♥️ \(\large{\underline{\textcolor{red}{\mathcal{SUMIT\:\:ROY\:\:(:\:\:}}}}\)
Please answer these very easy fractions!
Answers
1 2/3 x 4/5 = 5/3 x 4/5 = 20/15 = 1 5/15 = 1 1/3
1 2/3 x 5/4 = 5/3 x 5/4 = 25/12 = 2 1/12
Answer:
2 1/12
Step-by-step explanation:
1 2/3 x 1 = 1 2/3
1 2/3 x 4/5 = 5/3 x 4/5 = 20/15 = 1 5/15 = 1 1/3
1 2/3 x 5/4 = 5/3 x 5/4 = 25/12 = 2 1/12
Please help asap its okay if you get it wrong i wont judge.
Answers
Answer:
hm... 9
Step-by-step explanation:
read warriors
by eren hunter
2x8=16
17-7=9
Trust me this is correct!
I NEED THIS DONE ASAP
There are 4 white, 3 green, 6 black, and 2 yellow ribbons in a box. If Todd picks one ribbon from the box without looking, which color is he least likely to pick?
White
Green
Black
Yellow
(i think its yellow but i dont know)
Answers
Answer:
It's yellow, you're right :)
Step-by-step explanation:
Prob of white: 4/15
Prob of green: 3/15
Prob of black: 6/15
Prob of yellow: 2/15 (the least(
hope this helps! <3
Please help me. Mark me the branliest.
Topic: Percentage
Q1) 80% of a dog's mass is equal to 24% of the mass of a lion. If the mass of the lion is 105 kg more than the mass of the dog, find the total mass of the dog and the lion.
Answers
We are given that 80% of the dog's mass is equal to 24% of the lion's mass. Mathematically, this can be expressed as:
0.80D = 0.24L
We are also given that the mass of the lion is 105 kg more than the mass of the dog:
L = D + 105
We can use these two equations to find the values of D and L.
Substituting the value of L from the second equation into the first equation:
0.80D = 0.24(D + 105)
Now, let's solve for D:
0.80D = 0.24D + 0.24(105)
0.80D - 0.24D = 25.2
0.56D = 25.2
D = 25.2 / 0.56
D ≈ 45
Now that we have the value of D, we can find the value of L by substituting it back into the second equation:
L = 45 + 105
L = 150
Therefore, the total mass of the dog and the lion is:
D + L = 45 + 150 = 195 kg
So, the total mass of the dog and the lion is 195 kg.
What is the name of a solid that has two parallel polygon bases and all other faces that are rectangles?
Answers
Answer: Rectugaler Prism
Step-by-step explanation: Because thats how its built i think i just need points
Answer:
Prism
Step-by-step explanation:
A prism is a three-dimensional figure with two parallel, congruent bases. The bases, which are also two of the faces, can be any polygon. The other faces are rectangles. A prism is named according to the shape of its bases.
Learn more about Prism here
Visit —
https://brainly.in/question/3753576
https://brainly.com/question/28795033
https://brainly.com/question/23963432
Hope my answer helps you ✌️
Mark BRAINLIEST
please help
What value of f makes the equation f + 4.02 = 6.5 true?
Enter your answer as a decimal number, like this: 42.53
Answers
Answer: f=2.48
Step-by-step explanation: hope you enjoy ;)
Given:-
\( \sf{f + 4.02 = 6.5 - - - eqⁿ}\)\( \: \)
Solution:-
\( \sf{f + 4.02 = 6.5}\)\( \: \)
\( \sf{f = 6.5 - 4.02}\)\( \: \)
\( \boxed{ \sf{ \red{\: f = 2.48 \: }}}\)\( \: \)
To check the equation f + 4.02 = 6.5 is true or false , put the value of f = 2.48 in eqⁿ
\( \: \)
\( \sf{f + 4.02 = 6.5}\)\( \: \)
\( \sf \: 2.48 + 4.02 \\ \underline{ \sf = 6.5}\)\( \: \)
The equation of f + 4.02 = 6.5 is true.
\( \: \)
hope it helps! :)
Use the number line, How many 1/4-yard long pieces of pipe can be cut from two 1-yard long pieces of pipe?
Answers
Answer:
8
Step-by-step explanation:
2 1-yard long pieces of pipe would basically equal to 2 yards. so divide 2 by 1/4 which equals 8... so 8 pieces of 1/4-yard pieces of pipe would fit into 2 1-yard pieces of pipe
hope u understand :))
Explanation: I took the test
Please Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
Step-by-step explanation:
its 2:3
Answer:
Step-by-step explanation:
2:3