The initial temperature of a liquid is 50∘C. After which changes in temperature will the liquid be the same as the initial temperature?
Answers
Answer:
45.2
Step-by-step explanation:
Explanation:
The idea here is that you need to use the mass of water, the heat added to the sample, and the specific heat of water to find the resulting change in temperature.
The equation that establishes a relationship between heat absorbed and change in temperature looks like this
q
=
m
⋅
c
⋅
Δ
T
, where
q
- heat absorbed
m
- the mass of the sample
c
- the specific heat of water, equal to
4.18
J
g
∘
C
Δ
T
- the change in temperature, defined as final temperature minus initial temperature
Plug in your values and solve for
Δ
T
- do not forget to convert the added heat from kilojoules to Joules
q
=
m
⋅
c
⋅
Δ
T
⇒
Δ
T
=
q
m
⋅
c
Δ
T
=
1.0
⋅
10
3
J
50.0
g
⋅
4.18
J
g
∘
C
=
4.785
∘
C
So, if the temperature of the water changed by
4.785
∘
C
, and its final temperature is now
50.0
∘
C
, it follows that its initial temperature was
Δ
T
=
T
f
−
T
i
⇒
T
i
=
T
f
−
Δ
T
T
i
=
50.0
∘
C
−
4.785
∘
C
=
45.2
∘
C
Answer
i dont know , thats why im here
Step-by-step explanation:
Related Questions
i need help pls help
Answers
Answer:
x is 5
Step-by-step explanation:
which graph represent the liner function y= 1/3 x -4?
Answers
Answer:
Graph 3
Step-by-step explanation:
equation: y = mx + b → y = 1/3x - 4
- m is the slope (slope = rise / run):
- b is the y intercept (when x = 0): -4
Graph 1 is incorrect because the y-intercept is 1.5 on this graph when the equation is -4
Graph 2 is incorrect because the slope is 3 / 1, the rise is 3 and the run is 1
the correct equation for this graph is y = 3x - 4
Graph 3 is correct because the slope is 1/3, the rise is 1 and the run is 3
and the y intercept is -4
Graph 4 is incorrect because the y-intercept is not even shown
Referring to the figure, the shaded region reprsents the product
of what two fractions?
a. 3/4 × 3/4 c. 4/3 × 4/4
b. 3/4 × 4/4 d. 3/3 × 2/3
Referring to the figure, the shaded region reprsents the product
of what two fractions?
a. 3/4 × 3/4 c. 4/3 × 4/4
b. 3/4 × 4/4 d. 3/3 × 2/3
Answers
Answer:
b
Step-by-step explanation:
...
Patrick uses scrap metal to build sculptures. He wants to build a sculpture with triangles. He finds metal rods that are 20 in., 27 in., 47 in., and 67 in. long. Which combinations of three of these lengths can Patrick use to form a triangle? Justify your answer.
Answers
Hello !
- for a triangle to be constructible, the longest side must be less than the sum of the other two sides. -
so :
67 smaller than 27+47 ?
67 ⟨ 74 it's the right answer.
I hope I helped you !!
Have a good evening !!!
Patrick can form a triangle using the rod lengths of 20 inches and 27 inches and 47 inches. The other combinations of rod lengths do not meet the conditions laid out by the triangle inequality theorem.
Explanation:The subject of this question is Mathematics, specifically focusing on geometric properties of triangles. According to the triangle inequality theorem, a triangle can only form if the sum of the lengths of the two shorter sides is greater than the length of the longest side. In this context, Patrick uses scrap metal to build sculptures and wants to create triangles from metal rods which are 20 inches, 27 inches, 47 inches, and 67 inches long. Using the triangle inequality theorem, we can determine which combinations of rod lengths can form a triangle:
If he uses the rod lengths 20 inches, 27 inches, and 47 inches, it would satisfy the theorem since 20+27 = 47. Therefore, these lengths can form a triangle.For the rods with lengths of 20 inches, 47 inches, and 67 inches, the sum of the two shorter lengths (20+47 = 67) is not greater than the length of the longest rod (67). Hence, these lengths cannot form a triangle.Similarly, for rods measuring 20 inches, 27 inches, and 67 inches, the sum of the two shorter rods (20+27 = 47) is less than the length of the longest rod (67). Therefore, this combination can't form a triangle either.Learn more about Triangle Inequality Theoremwhy are there so many letter what dose this mean (´･ω･`)?
Answers
Answer:
A.
Step-by-step explanation:
(The symbol with the two lines and the curved line over them means congruent.)
Edge notes
Here are my notes for Congruence, Proof, and Constructions: Part Two Notes
Answers
Answer:
Hold on, I'm answering your questions and downloading it, I'll tell you later ok?
Step-by-step explanation:
Michel started to drive from New York to Washington, DC, which is 120 miles away, at 7:00 AM. For the first hour and a half of her trip, Michel was driving at a speed of 50 mph. What was her average speed during the second part of the trip, if she reached Washington at 10:00 AM?
Answers
Answer:
30 mph
Step-by-step explanation:
An art class is making a mural for their school which has a triangle drawn in the middle. The length of the bottom of the triangle is x. Another side is 13 more than two times the length of the bottom of the triangle. The last side is 11 more than the bottom of the triangle. Write and simplify an expression for the perimeter of the triangle.<3
Answers
Multiply the pairs of numbers and match them with their products. Tiles (-5)(4.2) (-7)(-3) (4) (5) (2.5)(-9) Pairs 22.5 21 -22.5 -21 111
Answers
Here are the pairs matched with their products:
- (-5)(4.2) matches with -21
- (-7)(-3) matches with 21
- (2.5)(-9) matches with -22.5
Pairs (4) and (5) do not have corresponding products in the given options.
(-5)(4.2) = -21
(-7)(-3) = 21
(4)(5) = 20
(2.5)(-9) = -22.5
So, the pairs of numbers and their products are as follows:
(-5)(4.2) = -21 matches with -21.
(-7)(-3) = 21 matches with 21.
(4)(5) = 20 matches with 20.
(2.5)(-9) = -22.5 matches with -22.5.
I hope this helps!
This is a question from Khan Academy:
A company makes spherical tanks that store chemicals. Their standard model has a diameter of 666 meters, but a customer needs a larger tank whose capacity is 2.52.52, point, 5 times the volume of the standard model.
Sanjay wants to make a smaller pyramid using the same mold, so he plans to fill the mold 2 cm from the top.
What is the approximate volume of this smaller pyramid?
Round to the nearest cubic centimeter.
Answers
Answer:
coool
Step-by-step explanation:
If ∠8 measures 116°, what is the measure of ∠3? (Lines b and c are parallel.)
64°
58°
116°
84°
Answers
Did the quiz
The mean for Set A is 28 and the mean for set B is 32.5. The mean absolute deviation (MAD) is 3. What is the difference of the means as a multiple of the mean absolute deviation (MAD)?
The difference of the means as a multiple of the MAD is
Answers
Answer:
-13.5
Step-by-step explanation:
Answer:
-13.5
Step-by-step explanation:
mean of 8 5 7 5 9 3 5
Answers
The graph shows the relationship between time a machine soda can make. Use the points (5,240) and (8,384) to find the number of soda bottles the machine can make each minute
The machine can make (???) soda bottles each minute
Answers
Answer:
Aproximitly 50 soda bottles
Step-by-step explanation:
\(\frac{Number of soda bottles }{minutes }\) = \(\frac{389-240}{8-5}\)
Subtract the numbers : \(\frac{149 soda bottles}{3 minutes}\)Divide: 149 ÷ 3 ≈ 49. 66667Round up because there cant be .66667 of a soda bottle\(\frac{50 soda bottle}{minute}\)The number of soda bottles the machine can make each minute is 44.67 0r 45 bottles per minute.
What is a slope?In mathematics, a line's slope, also known as its gradient, is a numerical representation of the line's steepness and direction.
The graph shows the relationship between time a machine soda can make.
To find the number of soda bottles the machine can make each minute:
We will find slope.
If a line passes through two points (x₁ ,y₁) and (x₂, y₂) ,
then the equation of line is
y - y₁ = (y₂- y₁) / (x₂ - x₁) x (x - x₁)
To find the slope;
m = (y₂- y₁) / (x₂ - x₁)
The slope of the line that passes through each pair of coordinate points. (5,240) and (8,384) is,
m = (384 - 250)/(8-5)
m = 134/3
m = 44.67
Therefore, the slope of the line is 44.67.
To learn more about the slope;
brainly.com/question/3605446
#SPJ2
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.
Which measure is equivalent to 350 centimeters?
3.5 m
35 m
350 m
3500 m
Answers
350*0.01 = 3.5
Easy math :)
Answer:
The answer to your question is 3.5 m
Step-by-step explanation:
1 m= 100 cms
so 350 cms = 3.5 m
I hope this helps and have a good day!
Which angles are vertical to each other? Select all that apply.
Answers
Answer:
1 and 4
Step-by-step explanation:
Answer:
A. EAJ and IAH
Step-by-step explanation:
The answer is A. EAJ and IAH because if you notice, angle "EAJ" starts at "E", goes down to "A", and to the right to "J". Now, if you would again notice, angle "IAH" stars at "I", goes up to "A", and to the left to "H".
The definition of a verticle angle are angles opposite each other where two lines cross.
I have attacked an image below of an example of a verticle angle. If you would notice, the image of the vertical angle I attached looks the same as option "A. EAJ and IAH".
Have a nice day! <3
ILL GIVE BRAINLIEST TO FIRST CORRECT ANSWER AND 50 POINTS
Every even number (greater than two) is the sum of two primes. What are the two prime numbers?
Answers
Answer: This may be a trick question since it doesn't state the number it goes up to so this is your answer
Step-by-step explanation:
Evan decides to leave a 20% tip on his total bill. The subtotal for food was $23.48 and he had to pay an 8% food tax. How much will he spend altogether?
Answers
$23.48 x 0.20 = 4.696
Round 4.696 to the nearest cent —> $4.70
8% / 100% = 0.08
$23.48 x 0.08 =1.8784
Round 1.8784 to the nearest cent —> $1.88
$23.48 + $4.70 + $1.88 = $30.06
Evan will pay a total of $30.06
A college cafeteria is looking for a new dessert to offer its 5,000 students. The table shows the preference of 225 students.
Ice Cream Candy Cake Pie Cookies
81 9 72 36 27
Which statement is the best prediction about the scoops of ice cream the college will need?
The college will have about 1,800 students who prefer ice cream.
The college will have about 800 students who prefer ice cream.
The college will have about 600 students who prefer ice cream.
The college will have about 144 students who prefer ice cream.
I did C but I got it wrong so what is it?
Answers
To determine the best prediction about the number of students who prefer ice cream, let's analyze the data provided in the table. According to the table, out of the 225 surveyed students:
Ice Cream: 81 students
Candy: 9 students
Cake: 72 students
Pie: 36 students
Cookies: 27 students
To estimate the number of students who prefer ice cream among the 5,000 total students, we can use the proportions:
Ice Cream proportion = (Number of Ice Cream preference) / (Total surveyed students)
Ice Cream proportion = 81 / 225
To estimate the number of students who prefer ice cream among the 5,000 total students, we can multiply the Ice Cream proportion by the total number of students:
Estimated number of Ice Cream preferences = Ice Cream proportion * Total students
Estimated number of Ice Cream preference = (81 / 225) * 5000
Calculating the estimated number of students who prefer ice cream:
Estimated number of Ice Cream preference = (0.36) * 5000
Estimated number of Ice Cream preferences ≈ 1800
Therefore, the best prediction about the scoops of ice cream the college will need is:
The college will have about 1,800 students who prefer ice cream.
So, option A is the correct answer.
Answer: I think it’s option A
Step-by-step explanation:
Write the math sentence as an equation: Negative eight times the sum of a number and 14.5 is 64.5
−8(r − 14.5) = 64.5
−8r + 14.5 = 64.5
−8(r + 14.5) = 64.5
−8r − 14.5 = 64.5
Answers
Answer:
The correct equation is −8(r + 14.5) = 64.5
Step-by-step explanation:
This equation states that negative 8 times the sum of a number (r) and 14.5 is equal to 64.5.
The other equations are not correct because they do not correctly represent the given statement. In equation 1, the minus sign is in the wrong place, and in equation 3, the minus sign is missing before the 14.5. In equation 4, the minus sign is missing before the 8.
I hope this helps. Let me know if you have any further questions.
You start with -8, then to multiply it my a sum you need to put that addition equation in parentheses so -8(r+14.5), then we know the whole thing is equal to 64.5, so -8(r+14.5)=64.5
By process of elimination: We know A is not correct because it has a subtraction problem in the parenthesis, and we know it should be addition because of the key word “sum” with refers to an addition problem.
We know B is not correct because there are no parenthesis, and since we need to multiply -8 to the sum/total of the addition problem, it wouldn’t work without parenthesis.
We know D is not correct for the same reasons as A and B, there are no parenthesis and there is not addition sign
I’m knew to this, and I tried to simplify my answer so if you need any clarification let me know! Good luck!
Can someone help me solve this and explain it to me so that I can get the hang of it? Thank you! (Extra Points)
Answers
Answer:
√4
Step-by-step explanation:
because 9x9=81
Hope this helps!!
Find the Unit Rate (Slope).
A grocery store sells 6 oranges for $2. Assume that
the cost of the oranges varies directly with the
number of oranges. What is the cost per orange (cost
for 1 orange)?
depends on
Unit Rate(m) =
Equation (y = mx):
Answers
hope this helps you out .
The cost of four scarves and six hats is $52. The cost of two hats is $1 more than the cost of one scarf. What are the costs of one scarf and one hat?
A. $4; $7
B. $5; $9
C. $6; $11
D. $7; $4
Answers
Answer:
D.i belive if nor sryyy
Step-by-step explanation:
Answer:
D
Cost of one scarf= $7
Cost of one hat= $4
Step-by-step explanation:
Let s represents the cost of scarfs
and h represents the cost of hats.
Cost of four scarfs and six hats is $52.00
i.e. 4s+6h=52
Cost of two hats is $1.00 more than the cost of one scarf.
i.e. 2h=s+1
s=2h-1
substituting s in 4s+6h=52
4(2h-1)+6h=52
8h-4+6h=52
14h=56
h=4
s=2h-1
s=8-1
s=7
Hence,
Cost of one scarf= $7
and Cost of one hat= $4
ASAP some answer this ASAP
Answers
Answer:
(-3, 7)
Step-by-step explanation:
minus the x value by 2, minus the y value 3, rule for reflection over line y=-x is (-x, -y), so just swap the signs, and thats your answer.
Im confused I got 70
Answers
Answer:
$190
Step-by-step explanation:
you just have to add all the numbers up- 62.89+48.26+81.99 which is about 193 so you would round down
An American traveling in Japan wishes to exchange American money for Japanese money. If the exchange rate is $1 = 80 yen, then how many dollars will the traveler need to purchase 10,000yen?
Answers
Answer: $125
Step-by-step explanation:
1/80=x/10,000
10,000/80=125
Hope this helped!
Answer:125 yen
Step-by-step explanation:
Ratio and proportion
Ratio=1:80=x:10,000
x represents dollars which is unknown
1/80=x/10,000
Then you cross multiply
80x=10,000
80x/80=10,000/80
x=125
Therefore,$125 will give you 10,000yen
PLEASE HELP FINSIH MY TEST
Find the probability of getting a red ball first, replace it and get a green ball next.
Answers
Answer:
the probability woukd be two out six.
Randall would like to purchase a new pair of athletic shoes that are regularly priced at $88.00. The store is running a 20% off sale. There is also a rebate for $20. Which is the better deal?
Answers
Answer: The shoes would be $17.60 and the rebate would be $4.00
Explanation: The shoes are normally expensive so it would be a better deal on the shoes rather than the rebate that isn't normally that expensive.
16 lakh students in India use khan academy today. The number of users are expected to grow by 50% every year. How many students in India would be using Khan Academy two years from now ?
Answers
Answer: 32,00,000
Step-by-step explanation:
We can use the formula
16,00,000 x 0.5 x 2 = 16,00,000
Total no. of students using Khan Academy after 2 years will be:
1600000 + 1600000 = 32,00,000
Answer:
36 Iakh students
Step-by-step explanation:
